4211 lines
109 KiB
C
4211 lines
109 KiB
C
/**********************************************************************
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* plperl.c - perl as a procedural language for PostgreSQL
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*
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* src/pl/plperl/plperl.c
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*
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**********************************************************************/
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#include "postgres.h"
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/* system stuff */
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#include <ctype.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <unistd.h>
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/* postgreSQL stuff */
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#include "access/htup_details.h"
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#include "access/xact.h"
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#include "catalog/pg_language.h"
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#include "catalog/pg_proc.h"
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#include "catalog/pg_type.h"
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#include "commands/event_trigger.h"
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#include "commands/trigger.h"
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#include "executor/spi.h"
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#include "funcapi.h"
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#include "mb/pg_wchar.h"
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#include "miscadmin.h"
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#include "nodes/makefuncs.h"
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#include "parser/parse_type.h"
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#include "storage/ipc.h"
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#include "tcop/tcopprot.h"
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#include "utils/builtins.h"
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#include "utils/fmgroids.h"
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#include "utils/guc.h"
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#include "utils/hsearch.h"
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#include "utils/lsyscache.h"
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#include "utils/memutils.h"
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#include "utils/rel.h"
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#include "utils/syscache.h"
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#include "utils/typcache.h"
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/* define our text domain for translations */
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#undef TEXTDOMAIN
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#define TEXTDOMAIN PG_TEXTDOMAIN("plperl")
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/* perl stuff */
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/* string literal macros defining chunks of perl code */
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#include "perlchunks.h"
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#include "plperl.h"
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#include "plperl_helpers.h"
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/* defines PLPERL_SET_OPMASK */
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#include "plperl_opmask.h"
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EXTERN_C void boot_DynaLoader(pTHX_ CV *cv);
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EXTERN_C void boot_PostgreSQL__InServer__Util(pTHX_ CV *cv);
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EXTERN_C void boot_PostgreSQL__InServer__SPI(pTHX_ CV *cv);
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PG_MODULE_MAGIC;
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/**********************************************************************
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* Information associated with a Perl interpreter. We have one interpreter
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* that is used for all plperlu (untrusted) functions. For plperl (trusted)
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* functions, there is a separate interpreter for each effective SQL userid.
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* (This is needed to ensure that an unprivileged user can't inject Perl code
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* that'll be executed with the privileges of some other SQL user.)
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*
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* The plperl_interp_desc structs are kept in a Postgres hash table indexed
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* by userid OID, with OID 0 used for the single untrusted interpreter.
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* Once created, an interpreter is kept for the life of the process.
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*
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* We start out by creating a "held" interpreter, which we initialize
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* only as far as we can do without deciding if it will be trusted or
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* untrusted. Later, when we first need to run a plperl or plperlu
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* function, we complete the initialization appropriately and move the
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* PerlInterpreter pointer into the plperl_interp_hash hashtable. If after
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* that we need more interpreters, we create them as needed if we can, or
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* fail if the Perl build doesn't support multiple interpreters.
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*
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* The reason for all the dancing about with a held interpreter is to make
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* it possible for people to preload a lot of Perl code at postmaster startup
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* (using plperl.on_init) and then use that code in backends. Of course this
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* will only work for the first interpreter created in any backend, but it's
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* still useful with that restriction.
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**********************************************************************/
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typedef struct plperl_interp_desc
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{
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Oid user_id; /* Hash key (must be first!) */
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PerlInterpreter *interp; /* The interpreter */
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HTAB *query_hash; /* plperl_query_entry structs */
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} plperl_interp_desc;
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/**********************************************************************
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* The information we cache about loaded procedures
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*
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* The fn_refcount field counts the struct's reference from the hash table
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* shown below, plus one reference for each function call level that is using
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* the struct. We can release the struct, and the associated Perl sub, when
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* the fn_refcount goes to zero. Releasing the struct itself is done by
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* deleting the fn_cxt, which also gets rid of all subsidiary data.
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**********************************************************************/
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typedef struct plperl_proc_desc
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{
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char *proname; /* user name of procedure */
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MemoryContext fn_cxt; /* memory context for this procedure */
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unsigned long fn_refcount; /* number of active references */
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TransactionId fn_xmin; /* xmin/TID of procedure's pg_proc tuple */
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ItemPointerData fn_tid;
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SV *reference; /* CODE reference for Perl sub */
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plperl_interp_desc *interp; /* interpreter it's created in */
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bool fn_readonly; /* is function readonly (not volatile)? */
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Oid lang_oid;
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List *trftypes;
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bool lanpltrusted; /* is it plperl, rather than plperlu? */
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bool fn_retistuple; /* true, if function returns tuple */
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bool fn_retisset; /* true, if function returns set */
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bool fn_retisarray; /* true if function returns array */
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/* Conversion info for function's result type: */
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Oid result_oid; /* Oid of result type */
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FmgrInfo result_in_func; /* I/O function and arg for result type */
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Oid result_typioparam;
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/* Per-argument info for function's argument types: */
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int nargs;
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FmgrInfo *arg_out_func; /* output fns for arg types */
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bool *arg_is_rowtype; /* is each arg composite? */
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Oid *arg_arraytype; /* InvalidOid if not an array */
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} plperl_proc_desc;
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#define increment_prodesc_refcount(prodesc) \
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((prodesc)->fn_refcount++)
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#define decrement_prodesc_refcount(prodesc) \
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do { \
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Assert((prodesc)->fn_refcount > 0); \
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if (--((prodesc)->fn_refcount) == 0) \
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free_plperl_function(prodesc); \
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} while(0)
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/**********************************************************************
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* For speedy lookup, we maintain a hash table mapping from
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* function OID + trigger flag + user OID to plperl_proc_desc pointers.
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* The reason the plperl_proc_desc struct isn't directly part of the hash
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* entry is to simplify recovery from errors during compile_plperl_function.
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*
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* Note: if the same function is called by multiple userIDs within a session,
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* there will be a separate plperl_proc_desc entry for each userID in the case
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* of plperl functions, but only one entry for plperlu functions, because we
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* set user_id = 0 for that case. If the user redeclares the same function
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* from plperl to plperlu or vice versa, there might be multiple
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* plperl_proc_ptr entries in the hashtable, but only one is valid.
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**********************************************************************/
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typedef struct plperl_proc_key
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{
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Oid proc_id; /* Function OID */
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/*
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* is_trigger is really a bool, but declare as Oid to ensure this struct
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* contains no padding
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*/
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Oid is_trigger; /* is it a trigger function? */
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Oid user_id; /* User calling the function, or 0 */
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} plperl_proc_key;
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typedef struct plperl_proc_ptr
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{
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plperl_proc_key proc_key; /* Hash key (must be first!) */
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plperl_proc_desc *proc_ptr;
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} plperl_proc_ptr;
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/*
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* The information we cache for the duration of a single call to a
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* function.
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*/
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typedef struct plperl_call_data
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{
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plperl_proc_desc *prodesc;
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FunctionCallInfo fcinfo;
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/* remaining fields are used only in a function returning set: */
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Tuplestorestate *tuple_store;
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TupleDesc ret_tdesc;
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Oid cdomain_oid; /* 0 unless returning domain-over-composite */
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void *cdomain_info;
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MemoryContext tmp_cxt;
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} plperl_call_data;
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/**********************************************************************
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* The information we cache about prepared and saved plans
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**********************************************************************/
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typedef struct plperl_query_desc
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{
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char qname[24];
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MemoryContext plan_cxt; /* context holding this struct */
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SPIPlanPtr plan;
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int nargs;
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Oid *argtypes;
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FmgrInfo *arginfuncs;
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Oid *argtypioparams;
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} plperl_query_desc;
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/* hash table entry for query desc */
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typedef struct plperl_query_entry
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{
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char query_name[NAMEDATALEN];
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plperl_query_desc *query_data;
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} plperl_query_entry;
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/**********************************************************************
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* Information for PostgreSQL - Perl array conversion.
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**********************************************************************/
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typedef struct plperl_array_info
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{
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int ndims;
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bool elem_is_rowtype; /* 't' if element type is a rowtype */
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Datum *elements;
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bool *nulls;
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int *nelems;
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FmgrInfo proc;
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FmgrInfo transform_proc;
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} plperl_array_info;
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/**********************************************************************
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* Global data
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**********************************************************************/
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static HTAB *plperl_interp_hash = NULL;
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static HTAB *plperl_proc_hash = NULL;
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static plperl_interp_desc *plperl_active_interp = NULL;
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/* If we have an unassigned "held" interpreter, it's stored here */
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static PerlInterpreter *plperl_held_interp = NULL;
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/* GUC variables */
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static bool plperl_use_strict = false;
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static char *plperl_on_init = NULL;
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static char *plperl_on_plperl_init = NULL;
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static char *plperl_on_plperlu_init = NULL;
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static bool plperl_ending = false;
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static OP *(*pp_require_orig) (pTHX) = NULL;
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static char plperl_opmask[MAXO];
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/* this is saved and restored by plperl_call_handler */
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static plperl_call_data *current_call_data = NULL;
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/**********************************************************************
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* Forward declarations
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**********************************************************************/
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void _PG_init(void);
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static PerlInterpreter *plperl_init_interp(void);
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static void plperl_destroy_interp(PerlInterpreter **);
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static void plperl_fini(int code, Datum arg);
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static void set_interp_require(bool trusted);
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static Datum plperl_func_handler(PG_FUNCTION_ARGS);
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static Datum plperl_trigger_handler(PG_FUNCTION_ARGS);
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static void plperl_event_trigger_handler(PG_FUNCTION_ARGS);
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static void free_plperl_function(plperl_proc_desc *prodesc);
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static plperl_proc_desc *compile_plperl_function(Oid fn_oid,
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bool is_trigger,
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bool is_event_trigger);
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static SV *plperl_hash_from_tuple(HeapTuple tuple, TupleDesc tupdesc, bool include_generated);
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static SV *plperl_hash_from_datum(Datum attr);
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static SV *plperl_ref_from_pg_array(Datum arg, Oid typid);
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static SV *split_array(plperl_array_info *info, int first, int last, int nest);
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static SV *make_array_ref(plperl_array_info *info, int first, int last);
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static SV *get_perl_array_ref(SV *sv);
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static Datum plperl_sv_to_datum(SV *sv, Oid typid, int32 typmod,
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FunctionCallInfo fcinfo,
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FmgrInfo *finfo, Oid typioparam,
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bool *isnull);
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static void _sv_to_datum_finfo(Oid typid, FmgrInfo *finfo, Oid *typioparam);
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static Datum plperl_array_to_datum(SV *src, Oid typid, int32 typmod);
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static void array_to_datum_internal(AV *av, ArrayBuildState *astate,
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int *ndims, int *dims, int cur_depth,
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Oid arraytypid, Oid elemtypid, int32 typmod,
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FmgrInfo *finfo, Oid typioparam);
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static Datum plperl_hash_to_datum(SV *src, TupleDesc td);
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static void plperl_init_shared_libs(pTHX);
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static void plperl_trusted_init(void);
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static void plperl_untrusted_init(void);
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static HV *plperl_spi_execute_fetch_result(SPITupleTable *, uint64, int);
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static void plperl_return_next_internal(SV *sv);
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static char *hek2cstr(HE *he);
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static SV **hv_store_string(HV *hv, const char *key, SV *val);
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static SV **hv_fetch_string(HV *hv, const char *key);
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static void plperl_create_sub(plperl_proc_desc *desc, const char *s, Oid fn_oid);
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static SV *plperl_call_perl_func(plperl_proc_desc *desc,
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FunctionCallInfo fcinfo);
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static void plperl_compile_callback(void *arg);
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static void plperl_exec_callback(void *arg);
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static void plperl_inline_callback(void *arg);
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static char *strip_trailing_ws(const char *msg);
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static OP *pp_require_safe(pTHX);
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static void activate_interpreter(plperl_interp_desc *interp_desc);
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#ifdef WIN32
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static char *setlocale_perl(int category, char *locale);
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#endif
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/*
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* Decrement the refcount of the given SV within the active Perl interpreter
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*
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* This is handy because it reloads the active-interpreter pointer, saving
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* some notation in callers that switch the active interpreter.
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*/
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static inline void
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SvREFCNT_dec_current(SV *sv)
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{
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dTHX;
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SvREFCNT_dec(sv);
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}
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/*
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* convert a HE (hash entry) key to a cstr in the current database encoding
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*/
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static char *
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hek2cstr(HE *he)
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{
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dTHX;
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char *ret;
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SV *sv;
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/*
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* HeSVKEY_force will return a temporary mortal SV*, so we need to make
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* sure to free it with ENTER/SAVE/FREE/LEAVE
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*/
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ENTER;
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SAVETMPS;
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/*-------------------------
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* Unfortunately, while HeUTF8 is true for most things > 256, for values
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* 128..255 it's not, but perl will treat them as unicode code points if
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* the utf8 flag is not set ( see The "Unicode Bug" in perldoc perlunicode
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* for more)
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*
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* So if we did the expected:
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* if (HeUTF8(he))
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* utf_u2e(key...);
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* else // must be ascii
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* return HePV(he);
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* we won't match columns with codepoints from 128..255
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*
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* For a more concrete example given a column with the name of the unicode
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* codepoint U+00ae (registered sign) and a UTF8 database and the perl
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* return_next { "\N{U+00ae}=>'text } would always fail as heUTF8 returns
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* 0 and HePV() would give us a char * with 1 byte contains the decimal
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* value 174
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*
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* Perl has the brains to know when it should utf8 encode 174 properly, so
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* here we force it into an SV so that perl will figure it out and do the
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* right thing
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*-------------------------
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*/
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sv = HeSVKEY_force(he);
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if (HeUTF8(he))
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SvUTF8_on(sv);
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ret = sv2cstr(sv);
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/* free sv */
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FREETMPS;
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LEAVE;
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return ret;
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}
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/*
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* _PG_init() - library load-time initialization
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*
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* DO NOT make this static nor change its name!
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*/
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void
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_PG_init(void)
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{
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/*
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* Be sure we do initialization only once.
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*
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* If initialization fails due to, e.g., plperl_init_interp() throwing an
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* exception, then we'll return here on the next usage and the user will
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* get a rather cryptic: ERROR: attempt to redefine parameter
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* "plperl.use_strict"
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*/
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static bool inited = false;
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HASHCTL hash_ctl;
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if (inited)
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return;
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/*
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* Support localized messages.
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*/
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pg_bindtextdomain(TEXTDOMAIN);
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/*
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* Initialize plperl's GUCs.
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*/
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DefineCustomBoolVariable("plperl.use_strict",
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gettext_noop("If true, trusted and untrusted Perl code will be compiled in strict mode."),
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NULL,
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&plperl_use_strict,
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false,
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PGC_USERSET, 0,
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NULL, NULL, NULL);
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/*
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* plperl.on_init is marked PGC_SIGHUP to support the idea that it might
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* be executed in the postmaster (if plperl is loaded into the postmaster
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* via shared_preload_libraries). This isn't really right either way,
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* though.
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*/
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DefineCustomStringVariable("plperl.on_init",
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gettext_noop("Perl initialization code to execute when a Perl interpreter is initialized."),
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NULL,
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&plperl_on_init,
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NULL,
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PGC_SIGHUP, 0,
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NULL, NULL, NULL);
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/*
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* plperl.on_plperl_init is marked PGC_SUSET to avoid issues whereby a
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* user who might not even have USAGE privilege on the plperl language
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* could nonetheless use SET plperl.on_plperl_init='...' to influence the
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* behaviour of any existing plperl function that they can execute (which
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* might be SECURITY DEFINER, leading to a privilege escalation). See
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* http://archives.postgresql.org/pgsql-hackers/2010-02/msg00281.php and
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* the overall thread.
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*
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* Note that because plperl.use_strict is USERSET, a nefarious user could
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* set it to be applied against other people's functions. This is judged
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* OK since the worst result would be an error. Your code oughta pass
|
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* use_strict anyway ;-)
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*/
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DefineCustomStringVariable("plperl.on_plperl_init",
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gettext_noop("Perl initialization code to execute once when plperl is first used."),
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NULL,
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&plperl_on_plperl_init,
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NULL,
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PGC_SUSET, 0,
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NULL, NULL, NULL);
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DefineCustomStringVariable("plperl.on_plperlu_init",
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gettext_noop("Perl initialization code to execute once when plperlu is first used."),
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NULL,
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&plperl_on_plperlu_init,
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NULL,
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PGC_SUSET, 0,
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NULL, NULL, NULL);
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|
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EmitWarningsOnPlaceholders("plperl");
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/*
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* Create hash tables.
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*/
|
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memset(&hash_ctl, 0, sizeof(hash_ctl));
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hash_ctl.keysize = sizeof(Oid);
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hash_ctl.entrysize = sizeof(plperl_interp_desc);
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plperl_interp_hash = hash_create("PL/Perl interpreters",
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8,
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&hash_ctl,
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HASH_ELEM | HASH_BLOBS);
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memset(&hash_ctl, 0, sizeof(hash_ctl));
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hash_ctl.keysize = sizeof(plperl_proc_key);
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hash_ctl.entrysize = sizeof(plperl_proc_ptr);
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plperl_proc_hash = hash_create("PL/Perl procedures",
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32,
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&hash_ctl,
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HASH_ELEM | HASH_BLOBS);
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|
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/*
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* Save the default opmask.
|
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*/
|
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PLPERL_SET_OPMASK(plperl_opmask);
|
|
|
|
/*
|
|
* Create the first Perl interpreter, but only partially initialize it.
|
|
*/
|
|
plperl_held_interp = plperl_init_interp();
|
|
|
|
inited = true;
|
|
}
|
|
|
|
|
|
static void
|
|
set_interp_require(bool trusted)
|
|
{
|
|
if (trusted)
|
|
{
|
|
PL_ppaddr[OP_REQUIRE] = pp_require_safe;
|
|
PL_ppaddr[OP_DOFILE] = pp_require_safe;
|
|
}
|
|
else
|
|
{
|
|
PL_ppaddr[OP_REQUIRE] = pp_require_orig;
|
|
PL_ppaddr[OP_DOFILE] = pp_require_orig;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Cleanup perl interpreters, including running END blocks.
|
|
* Does not fully undo the actions of _PG_init() nor make it callable again.
|
|
*/
|
|
static void
|
|
plperl_fini(int code, Datum arg)
|
|
{
|
|
HASH_SEQ_STATUS hash_seq;
|
|
plperl_interp_desc *interp_desc;
|
|
|
|
elog(DEBUG3, "plperl_fini");
|
|
|
|
/*
|
|
* Indicate that perl is terminating. Disables use of spi_* functions when
|
|
* running END/DESTROY code. See check_spi_usage_allowed(). Could be
|
|
* enabled in future, with care, using a transaction
|
|
* http://archives.postgresql.org/pgsql-hackers/2010-01/msg02743.php
|
|
*/
|
|
plperl_ending = true;
|
|
|
|
/* Only perform perl cleanup if we're exiting cleanly */
|
|
if (code)
|
|
{
|
|
elog(DEBUG3, "plperl_fini: skipped");
|
|
return;
|
|
}
|
|
|
|
/* Zap the "held" interpreter, if we still have it */
|
|
plperl_destroy_interp(&plperl_held_interp);
|
|
|
|
/* Zap any fully-initialized interpreters */
|
|
hash_seq_init(&hash_seq, plperl_interp_hash);
|
|
while ((interp_desc = hash_seq_search(&hash_seq)) != NULL)
|
|
{
|
|
if (interp_desc->interp)
|
|
{
|
|
activate_interpreter(interp_desc);
|
|
plperl_destroy_interp(&interp_desc->interp);
|
|
}
|
|
}
|
|
|
|
elog(DEBUG3, "plperl_fini: done");
|
|
}
|
|
|
|
|
|
/*
|
|
* Select and activate an appropriate Perl interpreter.
|
|
*/
|
|
static void
|
|
select_perl_context(bool trusted)
|
|
{
|
|
Oid user_id;
|
|
plperl_interp_desc *interp_desc;
|
|
bool found;
|
|
PerlInterpreter *interp = NULL;
|
|
|
|
/* Find or create the interpreter hashtable entry for this userid */
|
|
if (trusted)
|
|
user_id = GetUserId();
|
|
else
|
|
user_id = InvalidOid;
|
|
|
|
interp_desc = hash_search(plperl_interp_hash, &user_id,
|
|
HASH_ENTER,
|
|
&found);
|
|
if (!found)
|
|
{
|
|
/* Initialize newly-created hashtable entry */
|
|
interp_desc->interp = NULL;
|
|
interp_desc->query_hash = NULL;
|
|
}
|
|
|
|
/* Make sure we have a query_hash for this interpreter */
|
|
if (interp_desc->query_hash == NULL)
|
|
{
|
|
HASHCTL hash_ctl;
|
|
|
|
memset(&hash_ctl, 0, sizeof(hash_ctl));
|
|
hash_ctl.keysize = NAMEDATALEN;
|
|
hash_ctl.entrysize = sizeof(plperl_query_entry);
|
|
interp_desc->query_hash = hash_create("PL/Perl queries",
|
|
32,
|
|
&hash_ctl,
|
|
HASH_ELEM);
|
|
}
|
|
|
|
/*
|
|
* Quick exit if already have an interpreter
|
|
*/
|
|
if (interp_desc->interp)
|
|
{
|
|
activate_interpreter(interp_desc);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* adopt held interp if free, else create new one if possible
|
|
*/
|
|
if (plperl_held_interp != NULL)
|
|
{
|
|
/* first actual use of a perl interpreter */
|
|
interp = plperl_held_interp;
|
|
|
|
/*
|
|
* Reset the plperl_held_interp pointer first; if we fail during init
|
|
* we don't want to try again with the partially-initialized interp.
|
|
*/
|
|
plperl_held_interp = NULL;
|
|
|
|
if (trusted)
|
|
plperl_trusted_init();
|
|
else
|
|
plperl_untrusted_init();
|
|
|
|
/* successfully initialized, so arrange for cleanup */
|
|
on_proc_exit(plperl_fini, 0);
|
|
}
|
|
else
|
|
{
|
|
#ifdef MULTIPLICITY
|
|
|
|
/*
|
|
* plperl_init_interp will change Perl's idea of the active
|
|
* interpreter. Reset plperl_active_interp temporarily, so that if we
|
|
* hit an error partway through here, we'll make sure to switch back
|
|
* to a non-broken interpreter before running any other Perl
|
|
* functions.
|
|
*/
|
|
plperl_active_interp = NULL;
|
|
|
|
/* Now build the new interpreter */
|
|
interp = plperl_init_interp();
|
|
|
|
if (trusted)
|
|
plperl_trusted_init();
|
|
else
|
|
plperl_untrusted_init();
|
|
#else
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("cannot allocate multiple Perl interpreters on this platform")));
|
|
#endif
|
|
}
|
|
|
|
set_interp_require(trusted);
|
|
|
|
/*
|
|
* Since the timing of first use of PL/Perl can't be predicted, any
|
|
* database interaction during initialization is problematic. Including,
|
|
* but not limited to, security definer issues. So we only enable access
|
|
* to the database AFTER on_*_init code has run. See
|
|
* http://archives.postgresql.org/pgsql-hackers/2010-01/msg02669.php
|
|
*/
|
|
{
|
|
dTHX;
|
|
|
|
newXS("PostgreSQL::InServer::SPI::bootstrap",
|
|
boot_PostgreSQL__InServer__SPI, __FILE__);
|
|
|
|
eval_pv("PostgreSQL::InServer::SPI::bootstrap()", FALSE);
|
|
if (SvTRUE(ERRSV))
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
|
|
errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV))),
|
|
errcontext("while executing PostgreSQL::InServer::SPI::bootstrap")));
|
|
}
|
|
|
|
/* Fully initialized, so mark the hashtable entry valid */
|
|
interp_desc->interp = interp;
|
|
|
|
/* And mark this as the active interpreter */
|
|
plperl_active_interp = interp_desc;
|
|
}
|
|
|
|
/*
|
|
* Make the specified interpreter the active one
|
|
*
|
|
* A call with NULL does nothing. This is so that "restoring" to a previously
|
|
* null state of plperl_active_interp doesn't result in useless thrashing.
|
|
*/
|
|
static void
|
|
activate_interpreter(plperl_interp_desc *interp_desc)
|
|
{
|
|
if (interp_desc && plperl_active_interp != interp_desc)
|
|
{
|
|
Assert(interp_desc->interp);
|
|
PERL_SET_CONTEXT(interp_desc->interp);
|
|
/* trusted iff user_id isn't InvalidOid */
|
|
set_interp_require(OidIsValid(interp_desc->user_id));
|
|
plperl_active_interp = interp_desc;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Create a new Perl interpreter.
|
|
*
|
|
* We initialize the interpreter as far as we can without knowing whether
|
|
* it will become a trusted or untrusted interpreter; in particular, the
|
|
* plperl.on_init code will get executed. Later, either plperl_trusted_init
|
|
* or plperl_untrusted_init must be called to complete the initialization.
|
|
*/
|
|
static PerlInterpreter *
|
|
plperl_init_interp(void)
|
|
{
|
|
PerlInterpreter *plperl;
|
|
|
|
static char *embedding[3 + 2] = {
|
|
"", "-e", PLC_PERLBOOT
|
|
};
|
|
int nargs = 3;
|
|
|
|
#ifdef WIN32
|
|
|
|
/*
|
|
* The perl library on startup does horrible things like call
|
|
* setlocale(LC_ALL,""). We have protected against that on most platforms
|
|
* by setting the environment appropriately. However, on Windows,
|
|
* setlocale() does not consult the environment, so we need to save the
|
|
* existing locale settings before perl has a chance to mangle them and
|
|
* restore them after its dirty deeds are done.
|
|
*
|
|
* MSDN ref:
|
|
* http://msdn.microsoft.com/library/en-us/vclib/html/_crt_locale.asp
|
|
*
|
|
* It appears that we only need to do this on interpreter startup, and
|
|
* subsequent calls to the interpreter don't mess with the locale
|
|
* settings.
|
|
*
|
|
* We restore them using setlocale_perl(), defined below, so that Perl
|
|
* doesn't have a different idea of the locale from Postgres.
|
|
*
|
|
*/
|
|
|
|
char *loc;
|
|
char *save_collate,
|
|
*save_ctype,
|
|
*save_monetary,
|
|
*save_numeric,
|
|
*save_time;
|
|
|
|
loc = setlocale(LC_COLLATE, NULL);
|
|
save_collate = loc ? pstrdup(loc) : NULL;
|
|
loc = setlocale(LC_CTYPE, NULL);
|
|
save_ctype = loc ? pstrdup(loc) : NULL;
|
|
loc = setlocale(LC_MONETARY, NULL);
|
|
save_monetary = loc ? pstrdup(loc) : NULL;
|
|
loc = setlocale(LC_NUMERIC, NULL);
|
|
save_numeric = loc ? pstrdup(loc) : NULL;
|
|
loc = setlocale(LC_TIME, NULL);
|
|
save_time = loc ? pstrdup(loc) : NULL;
|
|
|
|
#define PLPERL_RESTORE_LOCALE(name, saved) \
|
|
STMT_START { \
|
|
if (saved != NULL) { setlocale_perl(name, saved); pfree(saved); } \
|
|
} STMT_END
|
|
#endif /* WIN32 */
|
|
|
|
if (plperl_on_init && *plperl_on_init)
|
|
{
|
|
embedding[nargs++] = "-e";
|
|
embedding[nargs++] = plperl_on_init;
|
|
}
|
|
|
|
/*
|
|
* The perl API docs state that PERL_SYS_INIT3 should be called before
|
|
* allocating interpreters. Unfortunately, on some platforms this fails in
|
|
* the Perl_do_taint() routine, which is called when the platform is using
|
|
* the system's malloc() instead of perl's own. Other platforms, notably
|
|
* Windows, fail if PERL_SYS_INIT3 is not called. So we call it if it's
|
|
* available, unless perl is using the system malloc(), which is true when
|
|
* MYMALLOC is set.
|
|
*/
|
|
#if defined(PERL_SYS_INIT3) && !defined(MYMALLOC)
|
|
{
|
|
static int perl_sys_init_done;
|
|
|
|
/* only call this the first time through, as per perlembed man page */
|
|
if (!perl_sys_init_done)
|
|
{
|
|
char *dummy_env[1] = {NULL};
|
|
|
|
PERL_SYS_INIT3(&nargs, (char ***) &embedding, (char ***) &dummy_env);
|
|
|
|
/*
|
|
* For unclear reasons, PERL_SYS_INIT3 sets the SIGFPE handler to
|
|
* SIG_IGN. Aside from being extremely unfriendly behavior for a
|
|
* library, this is dumb on the grounds that the results of a
|
|
* SIGFPE in this state are undefined according to POSIX, and in
|
|
* fact you get a forced process kill at least on Linux. Hence,
|
|
* restore the SIGFPE handler to the backend's standard setting.
|
|
* (See Perl bug 114574 for more information.)
|
|
*/
|
|
pqsignal(SIGFPE, FloatExceptionHandler);
|
|
|
|
perl_sys_init_done = 1;
|
|
/* quiet warning if PERL_SYS_INIT3 doesn't use the third argument */
|
|
dummy_env[0] = NULL;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
plperl = perl_alloc();
|
|
if (!plperl)
|
|
elog(ERROR, "could not allocate Perl interpreter");
|
|
|
|
PERL_SET_CONTEXT(plperl);
|
|
perl_construct(plperl);
|
|
|
|
/*
|
|
* Run END blocks in perl_destruct instead of perl_run. Note that dTHX
|
|
* loads up a pointer to the current interpreter, so we have to postpone
|
|
* it to here rather than put it at the function head.
|
|
*/
|
|
{
|
|
dTHX;
|
|
|
|
PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
|
|
|
|
/*
|
|
* Record the original function for the 'require' and 'dofile'
|
|
* opcodes. (They share the same implementation.) Ensure it's used
|
|
* for new interpreters.
|
|
*/
|
|
if (!pp_require_orig)
|
|
pp_require_orig = PL_ppaddr[OP_REQUIRE];
|
|
else
|
|
{
|
|
PL_ppaddr[OP_REQUIRE] = pp_require_orig;
|
|
PL_ppaddr[OP_DOFILE] = pp_require_orig;
|
|
}
|
|
|
|
#ifdef PLPERL_ENABLE_OPMASK_EARLY
|
|
|
|
/*
|
|
* For regression testing to prove that the PLC_PERLBOOT and
|
|
* PLC_TRUSTED code doesn't even compile any unsafe ops. In future
|
|
* there may be a valid need for them to do so, in which case this
|
|
* could be softened (perhaps moved to plperl_trusted_init()) or
|
|
* removed.
|
|
*/
|
|
PL_op_mask = plperl_opmask;
|
|
#endif
|
|
|
|
if (perl_parse(plperl, plperl_init_shared_libs,
|
|
nargs, embedding, NULL) != 0)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
|
|
errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV))),
|
|
errcontext("while parsing Perl initialization")));
|
|
|
|
if (perl_run(plperl) != 0)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
|
|
errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV))),
|
|
errcontext("while running Perl initialization")));
|
|
|
|
#ifdef PLPERL_RESTORE_LOCALE
|
|
PLPERL_RESTORE_LOCALE(LC_COLLATE, save_collate);
|
|
PLPERL_RESTORE_LOCALE(LC_CTYPE, save_ctype);
|
|
PLPERL_RESTORE_LOCALE(LC_MONETARY, save_monetary);
|
|
PLPERL_RESTORE_LOCALE(LC_NUMERIC, save_numeric);
|
|
PLPERL_RESTORE_LOCALE(LC_TIME, save_time);
|
|
#endif
|
|
}
|
|
|
|
return plperl;
|
|
}
|
|
|
|
|
|
/*
|
|
* Our safe implementation of the require opcode.
|
|
* This is safe because it's completely unable to load any code.
|
|
* If the requested file/module has already been loaded it'll return true.
|
|
* If not, it'll die.
|
|
* So now "use Foo;" will work iff Foo has already been loaded.
|
|
*/
|
|
static OP *
|
|
pp_require_safe(pTHX)
|
|
{
|
|
dVAR;
|
|
dSP;
|
|
SV *sv,
|
|
**svp;
|
|
char *name;
|
|
STRLEN len;
|
|
|
|
sv = POPs;
|
|
name = SvPV(sv, len);
|
|
if (!(name && len > 0 && *name))
|
|
RETPUSHNO;
|
|
|
|
svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
|
|
if (svp && *svp != &PL_sv_undef)
|
|
RETPUSHYES;
|
|
|
|
DIE(aTHX_ "Unable to load %s into plperl", name);
|
|
|
|
/*
|
|
* In most Perl versions, DIE() expands to a return statement, so the next
|
|
* line is not necessary. But in versions between but not including
|
|
* 5.11.1 and 5.13.3 it does not, so the next line is necessary to avoid a
|
|
* "control reaches end of non-void function" warning from gcc. Other
|
|
* compilers such as Solaris Studio will, however, issue a "statement not
|
|
* reached" warning instead.
|
|
*/
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/*
|
|
* Destroy one Perl interpreter ... actually we just run END blocks.
|
|
*
|
|
* Caller must have ensured this interpreter is the active one.
|
|
*/
|
|
static void
|
|
plperl_destroy_interp(PerlInterpreter **interp)
|
|
{
|
|
if (interp && *interp)
|
|
{
|
|
/*
|
|
* Only a very minimal destruction is performed: - just call END
|
|
* blocks.
|
|
*
|
|
* We could call perl_destruct() but we'd need to audit its actions
|
|
* very carefully and work-around any that impact us. (Calling
|
|
* sv_clean_objs() isn't an option because it's not part of perl's
|
|
* public API so isn't portably available.) Meanwhile END blocks can
|
|
* be used to perform manual cleanup.
|
|
*/
|
|
dTHX;
|
|
|
|
/* Run END blocks - based on perl's perl_destruct() */
|
|
if (PL_exit_flags & PERL_EXIT_DESTRUCT_END)
|
|
{
|
|
dJMPENV;
|
|
int x = 0;
|
|
|
|
JMPENV_PUSH(x);
|
|
PERL_UNUSED_VAR(x);
|
|
if (PL_endav && !PL_minus_c)
|
|
call_list(PL_scopestack_ix, PL_endav);
|
|
JMPENV_POP;
|
|
}
|
|
LEAVE;
|
|
FREETMPS;
|
|
|
|
*interp = NULL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Initialize the current Perl interpreter as a trusted interp
|
|
*/
|
|
static void
|
|
plperl_trusted_init(void)
|
|
{
|
|
dTHX;
|
|
HV *stash;
|
|
SV *sv;
|
|
char *key;
|
|
I32 klen;
|
|
|
|
/* use original require while we set up */
|
|
PL_ppaddr[OP_REQUIRE] = pp_require_orig;
|
|
PL_ppaddr[OP_DOFILE] = pp_require_orig;
|
|
|
|
eval_pv(PLC_TRUSTED, FALSE);
|
|
if (SvTRUE(ERRSV))
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
|
|
errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV))),
|
|
errcontext("while executing PLC_TRUSTED")));
|
|
|
|
/*
|
|
* Force loading of utf8 module now to prevent errors that can arise from
|
|
* the regex code later trying to load utf8 modules. See
|
|
* http://rt.perl.org/rt3/Ticket/Display.html?id=47576
|
|
*/
|
|
eval_pv("my $a=chr(0x100); return $a =~ /\\xa9/i", FALSE);
|
|
if (SvTRUE(ERRSV))
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
|
|
errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV))),
|
|
errcontext("while executing utf8fix")));
|
|
|
|
/*
|
|
* Lock down the interpreter
|
|
*/
|
|
|
|
/* switch to the safe require/dofile opcode for future code */
|
|
PL_ppaddr[OP_REQUIRE] = pp_require_safe;
|
|
PL_ppaddr[OP_DOFILE] = pp_require_safe;
|
|
|
|
/*
|
|
* prevent (any more) unsafe opcodes being compiled PL_op_mask is per
|
|
* interpreter, so this only needs to be set once
|
|
*/
|
|
PL_op_mask = plperl_opmask;
|
|
|
|
/* delete the DynaLoader:: namespace so extensions can't be loaded */
|
|
stash = gv_stashpv("DynaLoader", GV_ADDWARN);
|
|
hv_iterinit(stash);
|
|
while ((sv = hv_iternextsv(stash, &key, &klen)))
|
|
{
|
|
if (!isGV_with_GP(sv) || !GvCV(sv))
|
|
continue;
|
|
SvREFCNT_dec(GvCV(sv)); /* free the CV */
|
|
GvCV_set(sv, NULL); /* prevent call via GV */
|
|
}
|
|
hv_clear(stash);
|
|
|
|
/* invalidate assorted caches */
|
|
++PL_sub_generation;
|
|
hv_clear(PL_stashcache);
|
|
|
|
/*
|
|
* Execute plperl.on_plperl_init in the locked-down interpreter
|
|
*/
|
|
if (plperl_on_plperl_init && *plperl_on_plperl_init)
|
|
{
|
|
eval_pv(plperl_on_plperl_init, FALSE);
|
|
/* XXX need to find a way to determine a better errcode here */
|
|
if (SvTRUE(ERRSV))
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
|
|
errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV))),
|
|
errcontext("while executing plperl.on_plperl_init")));
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Initialize the current Perl interpreter as an untrusted interp
|
|
*/
|
|
static void
|
|
plperl_untrusted_init(void)
|
|
{
|
|
dTHX;
|
|
|
|
/*
|
|
* Nothing to do except execute plperl.on_plperlu_init
|
|
*/
|
|
if (plperl_on_plperlu_init && *plperl_on_plperlu_init)
|
|
{
|
|
eval_pv(plperl_on_plperlu_init, FALSE);
|
|
if (SvTRUE(ERRSV))
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
|
|
errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV))),
|
|
errcontext("while executing plperl.on_plperlu_init")));
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Perl likes to put a newline after its error messages; clean up such
|
|
*/
|
|
static char *
|
|
strip_trailing_ws(const char *msg)
|
|
{
|
|
char *res = pstrdup(msg);
|
|
int len = strlen(res);
|
|
|
|
while (len > 0 && isspace((unsigned char) res[len - 1]))
|
|
res[--len] = '\0';
|
|
return res;
|
|
}
|
|
|
|
|
|
/* Build a tuple from a hash. */
|
|
|
|
static HeapTuple
|
|
plperl_build_tuple_result(HV *perlhash, TupleDesc td)
|
|
{
|
|
dTHX;
|
|
Datum *values;
|
|
bool *nulls;
|
|
HE *he;
|
|
HeapTuple tup;
|
|
|
|
values = palloc0(sizeof(Datum) * td->natts);
|
|
nulls = palloc(sizeof(bool) * td->natts);
|
|
memset(nulls, true, sizeof(bool) * td->natts);
|
|
|
|
hv_iterinit(perlhash);
|
|
while ((he = hv_iternext(perlhash)))
|
|
{
|
|
SV *val = HeVAL(he);
|
|
char *key = hek2cstr(he);
|
|
int attn = SPI_fnumber(td, key);
|
|
Form_pg_attribute attr = TupleDescAttr(td, attn - 1);
|
|
|
|
if (attn == SPI_ERROR_NOATTRIBUTE)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_UNDEFINED_COLUMN),
|
|
errmsg("Perl hash contains nonexistent column \"%s\"",
|
|
key)));
|
|
if (attn <= 0)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("cannot set system attribute \"%s\"",
|
|
key)));
|
|
|
|
values[attn - 1] = plperl_sv_to_datum(val,
|
|
attr->atttypid,
|
|
attr->atttypmod,
|
|
NULL,
|
|
NULL,
|
|
InvalidOid,
|
|
&nulls[attn - 1]);
|
|
|
|
pfree(key);
|
|
}
|
|
hv_iterinit(perlhash);
|
|
|
|
tup = heap_form_tuple(td, values, nulls);
|
|
pfree(values);
|
|
pfree(nulls);
|
|
return tup;
|
|
}
|
|
|
|
/* convert a hash reference to a datum */
|
|
static Datum
|
|
plperl_hash_to_datum(SV *src, TupleDesc td)
|
|
{
|
|
HeapTuple tup = plperl_build_tuple_result((HV *) SvRV(src), td);
|
|
|
|
return HeapTupleGetDatum(tup);
|
|
}
|
|
|
|
/*
|
|
* if we are an array ref return the reference. this is special in that if we
|
|
* are a PostgreSQL::InServer::ARRAY object we will return the 'magic' array.
|
|
*/
|
|
static SV *
|
|
get_perl_array_ref(SV *sv)
|
|
{
|
|
dTHX;
|
|
|
|
if (SvOK(sv) && SvROK(sv))
|
|
{
|
|
if (SvTYPE(SvRV(sv)) == SVt_PVAV)
|
|
return sv;
|
|
else if (sv_isa(sv, "PostgreSQL::InServer::ARRAY"))
|
|
{
|
|
HV *hv = (HV *) SvRV(sv);
|
|
SV **sav = hv_fetch_string(hv, "array");
|
|
|
|
if (*sav && SvOK(*sav) && SvROK(*sav) &&
|
|
SvTYPE(SvRV(*sav)) == SVt_PVAV)
|
|
return *sav;
|
|
|
|
elog(ERROR, "could not get array reference from PostgreSQL::InServer::ARRAY object");
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* helper function for plperl_array_to_datum, recurses for multi-D arrays
|
|
*/
|
|
static void
|
|
array_to_datum_internal(AV *av, ArrayBuildState *astate,
|
|
int *ndims, int *dims, int cur_depth,
|
|
Oid arraytypid, Oid elemtypid, int32 typmod,
|
|
FmgrInfo *finfo, Oid typioparam)
|
|
{
|
|
dTHX;
|
|
int i;
|
|
int len = av_len(av) + 1;
|
|
|
|
for (i = 0; i < len; i++)
|
|
{
|
|
/* fetch the array element */
|
|
SV **svp = av_fetch(av, i, FALSE);
|
|
|
|
/* see if this element is an array, if so get that */
|
|
SV *sav = svp ? get_perl_array_ref(*svp) : NULL;
|
|
|
|
/* multi-dimensional array? */
|
|
if (sav)
|
|
{
|
|
AV *nav = (AV *) SvRV(sav);
|
|
|
|
/* dimensionality checks */
|
|
if (cur_depth + 1 > MAXDIM)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
|
|
errmsg("number of array dimensions (%d) exceeds the maximum allowed (%d)",
|
|
cur_depth + 1, MAXDIM)));
|
|
|
|
/* set size when at first element in this level, else compare */
|
|
if (i == 0 && *ndims == cur_depth)
|
|
{
|
|
dims[*ndims] = av_len(nav) + 1;
|
|
(*ndims)++;
|
|
}
|
|
else if (av_len(nav) + 1 != dims[cur_depth])
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
|
|
errmsg("multidimensional arrays must have array expressions with matching dimensions")));
|
|
|
|
/* recurse to fetch elements of this sub-array */
|
|
array_to_datum_internal(nav, astate,
|
|
ndims, dims, cur_depth + 1,
|
|
arraytypid, elemtypid, typmod,
|
|
finfo, typioparam);
|
|
}
|
|
else
|
|
{
|
|
Datum dat;
|
|
bool isnull;
|
|
|
|
/* scalar after some sub-arrays at same level? */
|
|
if (*ndims != cur_depth)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
|
|
errmsg("multidimensional arrays must have array expressions with matching dimensions")));
|
|
|
|
dat = plperl_sv_to_datum(svp ? *svp : NULL,
|
|
elemtypid,
|
|
typmod,
|
|
NULL,
|
|
finfo,
|
|
typioparam,
|
|
&isnull);
|
|
|
|
(void) accumArrayResult(astate, dat, isnull,
|
|
elemtypid, CurrentMemoryContext);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* convert perl array ref to a datum
|
|
*/
|
|
static Datum
|
|
plperl_array_to_datum(SV *src, Oid typid, int32 typmod)
|
|
{
|
|
dTHX;
|
|
ArrayBuildState *astate;
|
|
Oid elemtypid;
|
|
FmgrInfo finfo;
|
|
Oid typioparam;
|
|
int dims[MAXDIM];
|
|
int lbs[MAXDIM];
|
|
int ndims = 1;
|
|
int i;
|
|
|
|
elemtypid = get_element_type(typid);
|
|
if (!elemtypid)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_DATATYPE_MISMATCH),
|
|
errmsg("cannot convert Perl array to non-array type %s",
|
|
format_type_be(typid))));
|
|
|
|
astate = initArrayResult(elemtypid, CurrentMemoryContext, true);
|
|
|
|
_sv_to_datum_finfo(elemtypid, &finfo, &typioparam);
|
|
|
|
memset(dims, 0, sizeof(dims));
|
|
dims[0] = av_len((AV *) SvRV(src)) + 1;
|
|
|
|
array_to_datum_internal((AV *) SvRV(src), astate,
|
|
&ndims, dims, 1,
|
|
typid, elemtypid, typmod,
|
|
&finfo, typioparam);
|
|
|
|
/* ensure we get zero-D array for no inputs, as per PG convention */
|
|
if (dims[0] <= 0)
|
|
ndims = 0;
|
|
|
|
for (i = 0; i < ndims; i++)
|
|
lbs[i] = 1;
|
|
|
|
return makeMdArrayResult(astate, ndims, dims, lbs,
|
|
CurrentMemoryContext, true);
|
|
}
|
|
|
|
/* Get the information needed to convert data to the specified PG type */
|
|
static void
|
|
_sv_to_datum_finfo(Oid typid, FmgrInfo *finfo, Oid *typioparam)
|
|
{
|
|
Oid typinput;
|
|
|
|
/* XXX would be better to cache these lookups */
|
|
getTypeInputInfo(typid,
|
|
&typinput, typioparam);
|
|
fmgr_info(typinput, finfo);
|
|
}
|
|
|
|
/*
|
|
* convert Perl SV to PG datum of type typid, typmod typmod
|
|
*
|
|
* Pass the PL/Perl function's fcinfo when attempting to convert to the
|
|
* function's result type; otherwise pass NULL. This is used when we need to
|
|
* resolve the actual result type of a function returning RECORD.
|
|
*
|
|
* finfo and typioparam should be the results of _sv_to_datum_finfo for the
|
|
* given typid, or NULL/InvalidOid to let this function do the lookups.
|
|
*
|
|
* *isnull is an output parameter.
|
|
*/
|
|
static Datum
|
|
plperl_sv_to_datum(SV *sv, Oid typid, int32 typmod,
|
|
FunctionCallInfo fcinfo,
|
|
FmgrInfo *finfo, Oid typioparam,
|
|
bool *isnull)
|
|
{
|
|
FmgrInfo tmp;
|
|
Oid funcid;
|
|
|
|
/* we might recurse */
|
|
check_stack_depth();
|
|
|
|
*isnull = false;
|
|
|
|
/*
|
|
* Return NULL if result is undef, or if we're in a function returning
|
|
* VOID. In the latter case, we should pay no attention to the last Perl
|
|
* statement's result, and this is a convenient means to ensure that.
|
|
*/
|
|
if (!sv || !SvOK(sv) || typid == VOIDOID)
|
|
{
|
|
/* look up type info if they did not pass it */
|
|
if (!finfo)
|
|
{
|
|
_sv_to_datum_finfo(typid, &tmp, &typioparam);
|
|
finfo = &tmp;
|
|
}
|
|
*isnull = true;
|
|
/* must call typinput in case it wants to reject NULL */
|
|
return InputFunctionCall(finfo, NULL, typioparam, typmod);
|
|
}
|
|
else if ((funcid = get_transform_tosql(typid, current_call_data->prodesc->lang_oid, current_call_data->prodesc->trftypes)))
|
|
return OidFunctionCall1(funcid, PointerGetDatum(sv));
|
|
else if (SvROK(sv))
|
|
{
|
|
/* handle references */
|
|
SV *sav = get_perl_array_ref(sv);
|
|
|
|
if (sav)
|
|
{
|
|
/* handle an arrayref */
|
|
return plperl_array_to_datum(sav, typid, typmod);
|
|
}
|
|
else if (SvTYPE(SvRV(sv)) == SVt_PVHV)
|
|
{
|
|
/* handle a hashref */
|
|
Datum ret;
|
|
TupleDesc td;
|
|
bool isdomain;
|
|
|
|
if (!type_is_rowtype(typid))
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_DATATYPE_MISMATCH),
|
|
errmsg("cannot convert Perl hash to non-composite type %s",
|
|
format_type_be(typid))));
|
|
|
|
td = lookup_rowtype_tupdesc_domain(typid, typmod, true);
|
|
if (td != NULL)
|
|
{
|
|
/* Did we look through a domain? */
|
|
isdomain = (typid != td->tdtypeid);
|
|
}
|
|
else
|
|
{
|
|
/* Must be RECORD, try to resolve based on call info */
|
|
TypeFuncClass funcclass;
|
|
|
|
if (fcinfo)
|
|
funcclass = get_call_result_type(fcinfo, &typid, &td);
|
|
else
|
|
funcclass = TYPEFUNC_OTHER;
|
|
if (funcclass != TYPEFUNC_COMPOSITE &&
|
|
funcclass != TYPEFUNC_COMPOSITE_DOMAIN)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("function returning record called in context "
|
|
"that cannot accept type record")));
|
|
Assert(td);
|
|
isdomain = (funcclass == TYPEFUNC_COMPOSITE_DOMAIN);
|
|
}
|
|
|
|
ret = plperl_hash_to_datum(sv, td);
|
|
|
|
if (isdomain)
|
|
domain_check(ret, false, typid, NULL, NULL);
|
|
|
|
/* Release on the result of get_call_result_type is harmless */
|
|
ReleaseTupleDesc(td);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* If it's a reference to something else, such as a scalar, just
|
|
* recursively look through the reference.
|
|
*/
|
|
return plperl_sv_to_datum(SvRV(sv), typid, typmod,
|
|
fcinfo, finfo, typioparam,
|
|
isnull);
|
|
}
|
|
else
|
|
{
|
|
/* handle a string/number */
|
|
Datum ret;
|
|
char *str = sv2cstr(sv);
|
|
|
|
/* did not pass in any typeinfo? look it up */
|
|
if (!finfo)
|
|
{
|
|
_sv_to_datum_finfo(typid, &tmp, &typioparam);
|
|
finfo = &tmp;
|
|
}
|
|
|
|
ret = InputFunctionCall(finfo, str, typioparam, typmod);
|
|
pfree(str);
|
|
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* Convert the perl SV to a string returned by the type output function */
|
|
char *
|
|
plperl_sv_to_literal(SV *sv, char *fqtypename)
|
|
{
|
|
Datum str = CStringGetDatum(fqtypename);
|
|
Oid typid = DirectFunctionCall1(regtypein, str);
|
|
Oid typoutput;
|
|
Datum datum;
|
|
bool typisvarlena,
|
|
isnull;
|
|
|
|
if (!OidIsValid(typid))
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_UNDEFINED_OBJECT),
|
|
errmsg("lookup failed for type %s", fqtypename)));
|
|
|
|
datum = plperl_sv_to_datum(sv,
|
|
typid, -1,
|
|
NULL, NULL, InvalidOid,
|
|
&isnull);
|
|
|
|
if (isnull)
|
|
return NULL;
|
|
|
|
getTypeOutputInfo(typid,
|
|
&typoutput, &typisvarlena);
|
|
|
|
return OidOutputFunctionCall(typoutput, datum);
|
|
}
|
|
|
|
/*
|
|
* Convert PostgreSQL array datum to a perl array reference.
|
|
*
|
|
* typid is arg's OID, which must be an array type.
|
|
*/
|
|
static SV *
|
|
plperl_ref_from_pg_array(Datum arg, Oid typid)
|
|
{
|
|
dTHX;
|
|
ArrayType *ar = DatumGetArrayTypeP(arg);
|
|
Oid elementtype = ARR_ELEMTYPE(ar);
|
|
int16 typlen;
|
|
bool typbyval;
|
|
char typalign,
|
|
typdelim;
|
|
Oid typioparam;
|
|
Oid typoutputfunc;
|
|
Oid transform_funcid;
|
|
int i,
|
|
nitems,
|
|
*dims;
|
|
plperl_array_info *info;
|
|
SV *av;
|
|
HV *hv;
|
|
|
|
/*
|
|
* Currently we make no effort to cache any of the stuff we look up here,
|
|
* which is bad.
|
|
*/
|
|
info = palloc0(sizeof(plperl_array_info));
|
|
|
|
/* get element type information, including output conversion function */
|
|
get_type_io_data(elementtype, IOFunc_output,
|
|
&typlen, &typbyval, &typalign,
|
|
&typdelim, &typioparam, &typoutputfunc);
|
|
|
|
/* Check for a transform function */
|
|
transform_funcid = get_transform_fromsql(elementtype,
|
|
current_call_data->prodesc->lang_oid,
|
|
current_call_data->prodesc->trftypes);
|
|
|
|
/* Look up transform or output function as appropriate */
|
|
if (OidIsValid(transform_funcid))
|
|
fmgr_info(transform_funcid, &info->transform_proc);
|
|
else
|
|
fmgr_info(typoutputfunc, &info->proc);
|
|
|
|
info->elem_is_rowtype = type_is_rowtype(elementtype);
|
|
|
|
/* Get the number and bounds of array dimensions */
|
|
info->ndims = ARR_NDIM(ar);
|
|
dims = ARR_DIMS(ar);
|
|
|
|
/* No dimensions? Return an empty array */
|
|
if (info->ndims == 0)
|
|
{
|
|
av = newRV_noinc((SV *) newAV());
|
|
}
|
|
else
|
|
{
|
|
deconstruct_array(ar, elementtype, typlen, typbyval,
|
|
typalign, &info->elements, &info->nulls,
|
|
&nitems);
|
|
|
|
/* Get total number of elements in each dimension */
|
|
info->nelems = palloc(sizeof(int) * info->ndims);
|
|
info->nelems[0] = nitems;
|
|
for (i = 1; i < info->ndims; i++)
|
|
info->nelems[i] = info->nelems[i - 1] / dims[i - 1];
|
|
|
|
av = split_array(info, 0, nitems, 0);
|
|
}
|
|
|
|
hv = newHV();
|
|
(void) hv_store(hv, "array", 5, av, 0);
|
|
(void) hv_store(hv, "typeoid", 7, newSVuv(typid), 0);
|
|
|
|
return sv_bless(newRV_noinc((SV *) hv),
|
|
gv_stashpv("PostgreSQL::InServer::ARRAY", 0));
|
|
}
|
|
|
|
/*
|
|
* Recursively form array references from splices of the initial array
|
|
*/
|
|
static SV *
|
|
split_array(plperl_array_info *info, int first, int last, int nest)
|
|
{
|
|
dTHX;
|
|
int i;
|
|
AV *result;
|
|
|
|
/* we should only be called when we have something to split */
|
|
Assert(info->ndims > 0);
|
|
|
|
/* since this function recurses, it could be driven to stack overflow */
|
|
check_stack_depth();
|
|
|
|
/*
|
|
* Base case, return a reference to a single-dimensional array
|
|
*/
|
|
if (nest >= info->ndims - 1)
|
|
return make_array_ref(info, first, last);
|
|
|
|
result = newAV();
|
|
for (i = first; i < last; i += info->nelems[nest + 1])
|
|
{
|
|
/* Recursively form references to arrays of lower dimensions */
|
|
SV *ref = split_array(info, i, i + info->nelems[nest + 1], nest + 1);
|
|
|
|
av_push(result, ref);
|
|
}
|
|
return newRV_noinc((SV *) result);
|
|
}
|
|
|
|
/*
|
|
* Create a Perl reference from a one-dimensional C array, converting
|
|
* composite type elements to hash references.
|
|
*/
|
|
static SV *
|
|
make_array_ref(plperl_array_info *info, int first, int last)
|
|
{
|
|
dTHX;
|
|
int i;
|
|
AV *result = newAV();
|
|
|
|
for (i = first; i < last; i++)
|
|
{
|
|
if (info->nulls[i])
|
|
{
|
|
/*
|
|
* We can't use &PL_sv_undef here. See "AVs, HVs and undefined
|
|
* values" in perlguts.
|
|
*/
|
|
av_push(result, newSV(0));
|
|
}
|
|
else
|
|
{
|
|
Datum itemvalue = info->elements[i];
|
|
|
|
if (info->transform_proc.fn_oid)
|
|
av_push(result, (SV *) DatumGetPointer(FunctionCall1(&info->transform_proc, itemvalue)));
|
|
else if (info->elem_is_rowtype)
|
|
/* Handle composite type elements */
|
|
av_push(result, plperl_hash_from_datum(itemvalue));
|
|
else
|
|
{
|
|
char *val = OutputFunctionCall(&info->proc, itemvalue);
|
|
|
|
av_push(result, cstr2sv(val));
|
|
}
|
|
}
|
|
}
|
|
return newRV_noinc((SV *) result);
|
|
}
|
|
|
|
/* Set up the arguments for a trigger call. */
|
|
static SV *
|
|
plperl_trigger_build_args(FunctionCallInfo fcinfo)
|
|
{
|
|
dTHX;
|
|
TriggerData *tdata;
|
|
TupleDesc tupdesc;
|
|
int i;
|
|
char *level;
|
|
char *event;
|
|
char *relid;
|
|
char *when;
|
|
HV *hv;
|
|
|
|
hv = newHV();
|
|
hv_ksplit(hv, 12); /* pre-grow the hash */
|
|
|
|
tdata = (TriggerData *) fcinfo->context;
|
|
tupdesc = tdata->tg_relation->rd_att;
|
|
|
|
relid = DatumGetCString(DirectFunctionCall1(oidout,
|
|
ObjectIdGetDatum(tdata->tg_relation->rd_id)));
|
|
|
|
hv_store_string(hv, "name", cstr2sv(tdata->tg_trigger->tgname));
|
|
hv_store_string(hv, "relid", cstr2sv(relid));
|
|
|
|
/*
|
|
* Note: In BEFORE trigger, stored generated columns are not computed yet,
|
|
* so don't make them accessible in NEW row.
|
|
*/
|
|
|
|
if (TRIGGER_FIRED_BY_INSERT(tdata->tg_event))
|
|
{
|
|
event = "INSERT";
|
|
if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
|
|
hv_store_string(hv, "new",
|
|
plperl_hash_from_tuple(tdata->tg_trigtuple,
|
|
tupdesc,
|
|
!TRIGGER_FIRED_BEFORE(tdata->tg_event)));
|
|
}
|
|
else if (TRIGGER_FIRED_BY_DELETE(tdata->tg_event))
|
|
{
|
|
event = "DELETE";
|
|
if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
|
|
hv_store_string(hv, "old",
|
|
plperl_hash_from_tuple(tdata->tg_trigtuple,
|
|
tupdesc,
|
|
true));
|
|
}
|
|
else if (TRIGGER_FIRED_BY_UPDATE(tdata->tg_event))
|
|
{
|
|
event = "UPDATE";
|
|
if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
|
|
{
|
|
hv_store_string(hv, "old",
|
|
plperl_hash_from_tuple(tdata->tg_trigtuple,
|
|
tupdesc,
|
|
true));
|
|
hv_store_string(hv, "new",
|
|
plperl_hash_from_tuple(tdata->tg_newtuple,
|
|
tupdesc,
|
|
!TRIGGER_FIRED_BEFORE(tdata->tg_event)));
|
|
}
|
|
}
|
|
else if (TRIGGER_FIRED_BY_TRUNCATE(tdata->tg_event))
|
|
event = "TRUNCATE";
|
|
else
|
|
event = "UNKNOWN";
|
|
|
|
hv_store_string(hv, "event", cstr2sv(event));
|
|
hv_store_string(hv, "argc", newSViv(tdata->tg_trigger->tgnargs));
|
|
|
|
if (tdata->tg_trigger->tgnargs > 0)
|
|
{
|
|
AV *av = newAV();
|
|
|
|
av_extend(av, tdata->tg_trigger->tgnargs);
|
|
for (i = 0; i < tdata->tg_trigger->tgnargs; i++)
|
|
av_push(av, cstr2sv(tdata->tg_trigger->tgargs[i]));
|
|
hv_store_string(hv, "args", newRV_noinc((SV *) av));
|
|
}
|
|
|
|
hv_store_string(hv, "relname",
|
|
cstr2sv(SPI_getrelname(tdata->tg_relation)));
|
|
|
|
hv_store_string(hv, "table_name",
|
|
cstr2sv(SPI_getrelname(tdata->tg_relation)));
|
|
|
|
hv_store_string(hv, "table_schema",
|
|
cstr2sv(SPI_getnspname(tdata->tg_relation)));
|
|
|
|
if (TRIGGER_FIRED_BEFORE(tdata->tg_event))
|
|
when = "BEFORE";
|
|
else if (TRIGGER_FIRED_AFTER(tdata->tg_event))
|
|
when = "AFTER";
|
|
else if (TRIGGER_FIRED_INSTEAD(tdata->tg_event))
|
|
when = "INSTEAD OF";
|
|
else
|
|
when = "UNKNOWN";
|
|
hv_store_string(hv, "when", cstr2sv(when));
|
|
|
|
if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
|
|
level = "ROW";
|
|
else if (TRIGGER_FIRED_FOR_STATEMENT(tdata->tg_event))
|
|
level = "STATEMENT";
|
|
else
|
|
level = "UNKNOWN";
|
|
hv_store_string(hv, "level", cstr2sv(level));
|
|
|
|
return newRV_noinc((SV *) hv);
|
|
}
|
|
|
|
|
|
/* Set up the arguments for an event trigger call. */
|
|
static SV *
|
|
plperl_event_trigger_build_args(FunctionCallInfo fcinfo)
|
|
{
|
|
dTHX;
|
|
EventTriggerData *tdata;
|
|
HV *hv;
|
|
|
|
hv = newHV();
|
|
|
|
tdata = (EventTriggerData *) fcinfo->context;
|
|
|
|
hv_store_string(hv, "event", cstr2sv(tdata->event));
|
|
hv_store_string(hv, "tag", cstr2sv(tdata->tag));
|
|
|
|
return newRV_noinc((SV *) hv);
|
|
}
|
|
|
|
/* Construct the modified new tuple to be returned from a trigger. */
|
|
static HeapTuple
|
|
plperl_modify_tuple(HV *hvTD, TriggerData *tdata, HeapTuple otup)
|
|
{
|
|
dTHX;
|
|
SV **svp;
|
|
HV *hvNew;
|
|
HE *he;
|
|
HeapTuple rtup;
|
|
TupleDesc tupdesc;
|
|
int natts;
|
|
Datum *modvalues;
|
|
bool *modnulls;
|
|
bool *modrepls;
|
|
|
|
svp = hv_fetch_string(hvTD, "new");
|
|
if (!svp)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_UNDEFINED_COLUMN),
|
|
errmsg("$_TD->{new} does not exist")));
|
|
if (!SvOK(*svp) || !SvROK(*svp) || SvTYPE(SvRV(*svp)) != SVt_PVHV)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_DATATYPE_MISMATCH),
|
|
errmsg("$_TD->{new} is not a hash reference")));
|
|
hvNew = (HV *) SvRV(*svp);
|
|
|
|
tupdesc = tdata->tg_relation->rd_att;
|
|
natts = tupdesc->natts;
|
|
|
|
modvalues = (Datum *) palloc0(natts * sizeof(Datum));
|
|
modnulls = (bool *) palloc0(natts * sizeof(bool));
|
|
modrepls = (bool *) palloc0(natts * sizeof(bool));
|
|
|
|
hv_iterinit(hvNew);
|
|
while ((he = hv_iternext(hvNew)))
|
|
{
|
|
char *key = hek2cstr(he);
|
|
SV *val = HeVAL(he);
|
|
int attn = SPI_fnumber(tupdesc, key);
|
|
Form_pg_attribute attr = TupleDescAttr(tupdesc, attn - 1);
|
|
|
|
if (attn == SPI_ERROR_NOATTRIBUTE)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_UNDEFINED_COLUMN),
|
|
errmsg("Perl hash contains nonexistent column \"%s\"",
|
|
key)));
|
|
if (attn <= 0)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("cannot set system attribute \"%s\"",
|
|
key)));
|
|
if (attr->attgenerated)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
|
|
errmsg("cannot set generated column \"%s\"",
|
|
key)));
|
|
|
|
modvalues[attn - 1] = plperl_sv_to_datum(val,
|
|
attr->atttypid,
|
|
attr->atttypmod,
|
|
NULL,
|
|
NULL,
|
|
InvalidOid,
|
|
&modnulls[attn - 1]);
|
|
modrepls[attn - 1] = true;
|
|
|
|
pfree(key);
|
|
}
|
|
hv_iterinit(hvNew);
|
|
|
|
rtup = heap_modify_tuple(otup, tupdesc, modvalues, modnulls, modrepls);
|
|
|
|
pfree(modvalues);
|
|
pfree(modnulls);
|
|
pfree(modrepls);
|
|
|
|
return rtup;
|
|
}
|
|
|
|
|
|
/*
|
|
* There are three externally visible pieces to plperl: plperl_call_handler,
|
|
* plperl_inline_handler, and plperl_validator.
|
|
*/
|
|
|
|
/*
|
|
* The call handler is called to run normal functions (including trigger
|
|
* functions) that are defined in pg_proc.
|
|
*/
|
|
PG_FUNCTION_INFO_V1(plperl_call_handler);
|
|
|
|
Datum
|
|
plperl_call_handler(PG_FUNCTION_ARGS)
|
|
{
|
|
Datum retval = (Datum) 0;
|
|
plperl_call_data *volatile save_call_data = current_call_data;
|
|
plperl_interp_desc *volatile oldinterp = plperl_active_interp;
|
|
plperl_call_data this_call_data;
|
|
|
|
/* Initialize current-call status record */
|
|
MemSet(&this_call_data, 0, sizeof(this_call_data));
|
|
this_call_data.fcinfo = fcinfo;
|
|
|
|
PG_TRY();
|
|
{
|
|
current_call_data = &this_call_data;
|
|
if (CALLED_AS_TRIGGER(fcinfo))
|
|
retval = PointerGetDatum(plperl_trigger_handler(fcinfo));
|
|
else if (CALLED_AS_EVENT_TRIGGER(fcinfo))
|
|
{
|
|
plperl_event_trigger_handler(fcinfo);
|
|
retval = (Datum) 0;
|
|
}
|
|
else
|
|
retval = plperl_func_handler(fcinfo);
|
|
}
|
|
PG_FINALLY();
|
|
{
|
|
current_call_data = save_call_data;
|
|
activate_interpreter(oldinterp);
|
|
if (this_call_data.prodesc)
|
|
decrement_prodesc_refcount(this_call_data.prodesc);
|
|
}
|
|
PG_END_TRY();
|
|
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
* The inline handler runs anonymous code blocks (DO blocks).
|
|
*/
|
|
PG_FUNCTION_INFO_V1(plperl_inline_handler);
|
|
|
|
Datum
|
|
plperl_inline_handler(PG_FUNCTION_ARGS)
|
|
{
|
|
LOCAL_FCINFO(fake_fcinfo, 0);
|
|
InlineCodeBlock *codeblock = (InlineCodeBlock *) PG_GETARG_POINTER(0);
|
|
FmgrInfo flinfo;
|
|
plperl_proc_desc desc;
|
|
plperl_call_data *volatile save_call_data = current_call_data;
|
|
plperl_interp_desc *volatile oldinterp = plperl_active_interp;
|
|
plperl_call_data this_call_data;
|
|
ErrorContextCallback pl_error_context;
|
|
|
|
/* Initialize current-call status record */
|
|
MemSet(&this_call_data, 0, sizeof(this_call_data));
|
|
|
|
/* Set up a callback for error reporting */
|
|
pl_error_context.callback = plperl_inline_callback;
|
|
pl_error_context.previous = error_context_stack;
|
|
pl_error_context.arg = NULL;
|
|
error_context_stack = &pl_error_context;
|
|
|
|
/*
|
|
* Set up a fake fcinfo and descriptor with just enough info to satisfy
|
|
* plperl_call_perl_func(). In particular note that this sets things up
|
|
* with no arguments passed, and a result type of VOID.
|
|
*/
|
|
MemSet(fake_fcinfo, 0, SizeForFunctionCallInfo(0));
|
|
MemSet(&flinfo, 0, sizeof(flinfo));
|
|
MemSet(&desc, 0, sizeof(desc));
|
|
fake_fcinfo->flinfo = &flinfo;
|
|
flinfo.fn_oid = InvalidOid;
|
|
flinfo.fn_mcxt = CurrentMemoryContext;
|
|
|
|
desc.proname = "inline_code_block";
|
|
desc.fn_readonly = false;
|
|
|
|
desc.lang_oid = codeblock->langOid;
|
|
desc.trftypes = NIL;
|
|
desc.lanpltrusted = codeblock->langIsTrusted;
|
|
|
|
desc.fn_retistuple = false;
|
|
desc.fn_retisset = false;
|
|
desc.fn_retisarray = false;
|
|
desc.result_oid = InvalidOid;
|
|
desc.nargs = 0;
|
|
desc.reference = NULL;
|
|
|
|
this_call_data.fcinfo = fake_fcinfo;
|
|
this_call_data.prodesc = &desc;
|
|
/* we do not bother with refcounting the fake prodesc */
|
|
|
|
PG_TRY();
|
|
{
|
|
SV *perlret;
|
|
|
|
current_call_data = &this_call_data;
|
|
|
|
if (SPI_connect_ext(codeblock->atomic ? 0 : SPI_OPT_NONATOMIC) != SPI_OK_CONNECT)
|
|
elog(ERROR, "could not connect to SPI manager");
|
|
|
|
select_perl_context(desc.lanpltrusted);
|
|
|
|
plperl_create_sub(&desc, codeblock->source_text, 0);
|
|
|
|
if (!desc.reference) /* can this happen? */
|
|
elog(ERROR, "could not create internal procedure for anonymous code block");
|
|
|
|
perlret = plperl_call_perl_func(&desc, fake_fcinfo);
|
|
|
|
SvREFCNT_dec_current(perlret);
|
|
|
|
if (SPI_finish() != SPI_OK_FINISH)
|
|
elog(ERROR, "SPI_finish() failed");
|
|
}
|
|
PG_FINALLY();
|
|
{
|
|
if (desc.reference)
|
|
SvREFCNT_dec_current(desc.reference);
|
|
current_call_data = save_call_data;
|
|
activate_interpreter(oldinterp);
|
|
}
|
|
PG_END_TRY();
|
|
|
|
error_context_stack = pl_error_context.previous;
|
|
|
|
PG_RETURN_VOID();
|
|
}
|
|
|
|
/*
|
|
* The validator is called during CREATE FUNCTION to validate the function
|
|
* being created/replaced. The precise behavior of the validator may be
|
|
* modified by the check_function_bodies GUC.
|
|
*/
|
|
PG_FUNCTION_INFO_V1(plperl_validator);
|
|
|
|
Datum
|
|
plperl_validator(PG_FUNCTION_ARGS)
|
|
{
|
|
Oid funcoid = PG_GETARG_OID(0);
|
|
HeapTuple tuple;
|
|
Form_pg_proc proc;
|
|
char functyptype;
|
|
int numargs;
|
|
Oid *argtypes;
|
|
char **argnames;
|
|
char *argmodes;
|
|
bool is_trigger = false;
|
|
bool is_event_trigger = false;
|
|
int i;
|
|
|
|
if (!CheckFunctionValidatorAccess(fcinfo->flinfo->fn_oid, funcoid))
|
|
PG_RETURN_VOID();
|
|
|
|
/* Get the new function's pg_proc entry */
|
|
tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcoid));
|
|
if (!HeapTupleIsValid(tuple))
|
|
elog(ERROR, "cache lookup failed for function %u", funcoid);
|
|
proc = (Form_pg_proc) GETSTRUCT(tuple);
|
|
|
|
functyptype = get_typtype(proc->prorettype);
|
|
|
|
/* Disallow pseudotype result */
|
|
/* except for TRIGGER, EVTTRIGGER, RECORD, or VOID */
|
|
if (functyptype == TYPTYPE_PSEUDO)
|
|
{
|
|
/* we assume OPAQUE with no arguments means a trigger */
|
|
if (proc->prorettype == TRIGGEROID ||
|
|
(proc->prorettype == OPAQUEOID && proc->pronargs == 0))
|
|
is_trigger = true;
|
|
else if (proc->prorettype == EVTTRIGGEROID)
|
|
is_event_trigger = true;
|
|
else if (proc->prorettype != RECORDOID &&
|
|
proc->prorettype != VOIDOID)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("PL/Perl functions cannot return type %s",
|
|
format_type_be(proc->prorettype))));
|
|
}
|
|
|
|
/* Disallow pseudotypes in arguments (either IN or OUT) */
|
|
numargs = get_func_arg_info(tuple,
|
|
&argtypes, &argnames, &argmodes);
|
|
for (i = 0; i < numargs; i++)
|
|
{
|
|
if (get_typtype(argtypes[i]) == TYPTYPE_PSEUDO &&
|
|
argtypes[i] != RECORDOID)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("PL/Perl functions cannot accept type %s",
|
|
format_type_be(argtypes[i]))));
|
|
}
|
|
|
|
ReleaseSysCache(tuple);
|
|
|
|
/* Postpone body checks if !check_function_bodies */
|
|
if (check_function_bodies)
|
|
{
|
|
(void) compile_plperl_function(funcoid, is_trigger, is_event_trigger);
|
|
}
|
|
|
|
/* the result of a validator is ignored */
|
|
PG_RETURN_VOID();
|
|
}
|
|
|
|
|
|
/*
|
|
* plperlu likewise requires three externally visible functions:
|
|
* plperlu_call_handler, plperlu_inline_handler, and plperlu_validator.
|
|
* These are currently just aliases that send control to the plperl
|
|
* handler functions, and we decide whether a particular function is
|
|
* trusted or not by inspecting the actual pg_language tuple.
|
|
*/
|
|
|
|
PG_FUNCTION_INFO_V1(plperlu_call_handler);
|
|
|
|
Datum
|
|
plperlu_call_handler(PG_FUNCTION_ARGS)
|
|
{
|
|
return plperl_call_handler(fcinfo);
|
|
}
|
|
|
|
PG_FUNCTION_INFO_V1(plperlu_inline_handler);
|
|
|
|
Datum
|
|
plperlu_inline_handler(PG_FUNCTION_ARGS)
|
|
{
|
|
return plperl_inline_handler(fcinfo);
|
|
}
|
|
|
|
PG_FUNCTION_INFO_V1(plperlu_validator);
|
|
|
|
Datum
|
|
plperlu_validator(PG_FUNCTION_ARGS)
|
|
{
|
|
/* call plperl validator with our fcinfo so it gets our oid */
|
|
return plperl_validator(fcinfo);
|
|
}
|
|
|
|
|
|
/*
|
|
* Uses mkfunc to create a subroutine whose text is
|
|
* supplied in s, and returns a reference to it
|
|
*/
|
|
static void
|
|
plperl_create_sub(plperl_proc_desc *prodesc, const char *s, Oid fn_oid)
|
|
{
|
|
dTHX;
|
|
dSP;
|
|
char subname[NAMEDATALEN + 40];
|
|
HV *pragma_hv = newHV();
|
|
SV *subref = NULL;
|
|
int count;
|
|
|
|
sprintf(subname, "%s__%u", prodesc->proname, fn_oid);
|
|
|
|
if (plperl_use_strict)
|
|
hv_store_string(pragma_hv, "strict", (SV *) newAV());
|
|
|
|
ENTER;
|
|
SAVETMPS;
|
|
PUSHMARK(SP);
|
|
EXTEND(SP, 4);
|
|
PUSHs(sv_2mortal(cstr2sv(subname)));
|
|
PUSHs(sv_2mortal(newRV_noinc((SV *) pragma_hv)));
|
|
|
|
/*
|
|
* Use 'false' for $prolog in mkfunc, which is kept for compatibility in
|
|
* case a module such as PostgreSQL::PLPerl::NYTprof replaces the function
|
|
* compiler.
|
|
*/
|
|
PUSHs(&PL_sv_no);
|
|
PUSHs(sv_2mortal(cstr2sv(s)));
|
|
PUTBACK;
|
|
|
|
/*
|
|
* G_KEEPERR seems to be needed here, else we don't recognize compile
|
|
* errors properly. Perhaps it's because there's another level of eval
|
|
* inside mksafefunc?
|
|
*/
|
|
count = perl_call_pv("PostgreSQL::InServer::mkfunc",
|
|
G_SCALAR | G_EVAL | G_KEEPERR);
|
|
SPAGAIN;
|
|
|
|
if (count == 1)
|
|
{
|
|
SV *sub_rv = (SV *) POPs;
|
|
|
|
if (sub_rv && SvROK(sub_rv) && SvTYPE(SvRV(sub_rv)) == SVt_PVCV)
|
|
{
|
|
subref = newRV_inc(SvRV(sub_rv));
|
|
}
|
|
}
|
|
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
|
|
if (SvTRUE(ERRSV))
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_SYNTAX_ERROR),
|
|
errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV)))));
|
|
|
|
if (!subref)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_SYNTAX_ERROR),
|
|
errmsg("didn't get a CODE reference from compiling function \"%s\"",
|
|
prodesc->proname)));
|
|
|
|
prodesc->reference = subref;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* plperl_init_shared_libs() -
|
|
**********************************************************************/
|
|
|
|
static void
|
|
plperl_init_shared_libs(pTHX)
|
|
{
|
|
char *file = __FILE__;
|
|
|
|
newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
|
|
newXS("PostgreSQL::InServer::Util::bootstrap",
|
|
boot_PostgreSQL__InServer__Util, file);
|
|
/* newXS for...::SPI::bootstrap is in select_perl_context() */
|
|
}
|
|
|
|
|
|
static SV *
|
|
plperl_call_perl_func(plperl_proc_desc *desc, FunctionCallInfo fcinfo)
|
|
{
|
|
dTHX;
|
|
dSP;
|
|
SV *retval;
|
|
int i;
|
|
int count;
|
|
Oid *argtypes = NULL;
|
|
int nargs = 0;
|
|
|
|
ENTER;
|
|
SAVETMPS;
|
|
|
|
PUSHMARK(SP);
|
|
EXTEND(sp, desc->nargs);
|
|
|
|
/* Get signature for true functions; inline blocks have no args. */
|
|
if (fcinfo->flinfo->fn_oid)
|
|
get_func_signature(fcinfo->flinfo->fn_oid, &argtypes, &nargs);
|
|
Assert(nargs == desc->nargs);
|
|
|
|
for (i = 0; i < desc->nargs; i++)
|
|
{
|
|
if (fcinfo->args[i].isnull)
|
|
PUSHs(&PL_sv_undef);
|
|
else if (desc->arg_is_rowtype[i])
|
|
{
|
|
SV *sv = plperl_hash_from_datum(fcinfo->args[i].value);
|
|
|
|
PUSHs(sv_2mortal(sv));
|
|
}
|
|
else
|
|
{
|
|
SV *sv;
|
|
Oid funcid;
|
|
|
|
if (OidIsValid(desc->arg_arraytype[i]))
|
|
sv = plperl_ref_from_pg_array(fcinfo->args[i].value, desc->arg_arraytype[i]);
|
|
else if ((funcid = get_transform_fromsql(argtypes[i], current_call_data->prodesc->lang_oid, current_call_data->prodesc->trftypes)))
|
|
sv = (SV *) DatumGetPointer(OidFunctionCall1(funcid, fcinfo->args[i].value));
|
|
else
|
|
{
|
|
char *tmp;
|
|
|
|
tmp = OutputFunctionCall(&(desc->arg_out_func[i]),
|
|
fcinfo->args[i].value);
|
|
sv = cstr2sv(tmp);
|
|
pfree(tmp);
|
|
}
|
|
|
|
PUSHs(sv_2mortal(sv));
|
|
}
|
|
}
|
|
PUTBACK;
|
|
|
|
/* Do NOT use G_KEEPERR here */
|
|
count = perl_call_sv(desc->reference, G_SCALAR | G_EVAL);
|
|
|
|
SPAGAIN;
|
|
|
|
if (count != 1)
|
|
{
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
|
|
errmsg("didn't get a return item from function")));
|
|
}
|
|
|
|
if (SvTRUE(ERRSV))
|
|
{
|
|
(void) POPs;
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
/* XXX need to find a way to determine a better errcode here */
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
|
|
errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV)))));
|
|
}
|
|
|
|
retval = newSVsv(POPs);
|
|
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
static SV *
|
|
plperl_call_perl_trigger_func(plperl_proc_desc *desc, FunctionCallInfo fcinfo,
|
|
SV *td)
|
|
{
|
|
dTHX;
|
|
dSP;
|
|
SV *retval,
|
|
*TDsv;
|
|
int i,
|
|
count;
|
|
Trigger *tg_trigger = ((TriggerData *) fcinfo->context)->tg_trigger;
|
|
|
|
ENTER;
|
|
SAVETMPS;
|
|
|
|
TDsv = get_sv("main::_TD", 0);
|
|
if (!TDsv)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
|
|
errmsg("couldn't fetch $_TD")));
|
|
|
|
save_item(TDsv); /* local $_TD */
|
|
sv_setsv(TDsv, td);
|
|
|
|
PUSHMARK(sp);
|
|
EXTEND(sp, tg_trigger->tgnargs);
|
|
|
|
for (i = 0; i < tg_trigger->tgnargs; i++)
|
|
PUSHs(sv_2mortal(cstr2sv(tg_trigger->tgargs[i])));
|
|
PUTBACK;
|
|
|
|
/* Do NOT use G_KEEPERR here */
|
|
count = perl_call_sv(desc->reference, G_SCALAR | G_EVAL);
|
|
|
|
SPAGAIN;
|
|
|
|
if (count != 1)
|
|
{
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
|
|
errmsg("didn't get a return item from trigger function")));
|
|
}
|
|
|
|
if (SvTRUE(ERRSV))
|
|
{
|
|
(void) POPs;
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
/* XXX need to find a way to determine a better errcode here */
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
|
|
errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV)))));
|
|
}
|
|
|
|
retval = newSVsv(POPs);
|
|
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
static void
|
|
plperl_call_perl_event_trigger_func(plperl_proc_desc *desc,
|
|
FunctionCallInfo fcinfo,
|
|
SV *td)
|
|
{
|
|
dTHX;
|
|
dSP;
|
|
SV *retval,
|
|
*TDsv;
|
|
int count;
|
|
|
|
ENTER;
|
|
SAVETMPS;
|
|
|
|
TDsv = get_sv("main::_TD", 0);
|
|
if (!TDsv)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
|
|
errmsg("couldn't fetch $_TD")));
|
|
|
|
save_item(TDsv); /* local $_TD */
|
|
sv_setsv(TDsv, td);
|
|
|
|
PUSHMARK(sp);
|
|
PUTBACK;
|
|
|
|
/* Do NOT use G_KEEPERR here */
|
|
count = perl_call_sv(desc->reference, G_SCALAR | G_EVAL);
|
|
|
|
SPAGAIN;
|
|
|
|
if (count != 1)
|
|
{
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
|
|
errmsg("didn't get a return item from trigger function")));
|
|
}
|
|
|
|
if (SvTRUE(ERRSV))
|
|
{
|
|
(void) POPs;
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
/* XXX need to find a way to determine a better errcode here */
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
|
|
errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV)))));
|
|
}
|
|
|
|
retval = newSVsv(POPs);
|
|
(void) retval; /* silence compiler warning */
|
|
|
|
PUTBACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
}
|
|
|
|
static Datum
|
|
plperl_func_handler(PG_FUNCTION_ARGS)
|
|
{
|
|
bool nonatomic;
|
|
plperl_proc_desc *prodesc;
|
|
SV *perlret;
|
|
Datum retval = 0;
|
|
ReturnSetInfo *rsi;
|
|
ErrorContextCallback pl_error_context;
|
|
|
|
nonatomic = fcinfo->context &&
|
|
IsA(fcinfo->context, CallContext) &&
|
|
!castNode(CallContext, fcinfo->context)->atomic;
|
|
|
|
if (SPI_connect_ext(nonatomic ? SPI_OPT_NONATOMIC : 0) != SPI_OK_CONNECT)
|
|
elog(ERROR, "could not connect to SPI manager");
|
|
|
|
prodesc = compile_plperl_function(fcinfo->flinfo->fn_oid, false, false);
|
|
current_call_data->prodesc = prodesc;
|
|
increment_prodesc_refcount(prodesc);
|
|
|
|
/* Set a callback for error reporting */
|
|
pl_error_context.callback = plperl_exec_callback;
|
|
pl_error_context.previous = error_context_stack;
|
|
pl_error_context.arg = prodesc->proname;
|
|
error_context_stack = &pl_error_context;
|
|
|
|
rsi = (ReturnSetInfo *) fcinfo->resultinfo;
|
|
|
|
if (prodesc->fn_retisset)
|
|
{
|
|
/* Check context before allowing the call to go through */
|
|
if (!rsi || !IsA(rsi, ReturnSetInfo) ||
|
|
(rsi->allowedModes & SFRM_Materialize) == 0)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("set-valued function called in context that "
|
|
"cannot accept a set")));
|
|
}
|
|
|
|
activate_interpreter(prodesc->interp);
|
|
|
|
perlret = plperl_call_perl_func(prodesc, fcinfo);
|
|
|
|
/************************************************************
|
|
* Disconnect from SPI manager and then create the return
|
|
* values datum (if the input function does a palloc for it
|
|
* this must not be allocated in the SPI memory context
|
|
* because SPI_finish would free it).
|
|
************************************************************/
|
|
if (SPI_finish() != SPI_OK_FINISH)
|
|
elog(ERROR, "SPI_finish() failed");
|
|
|
|
if (prodesc->fn_retisset)
|
|
{
|
|
SV *sav;
|
|
|
|
/*
|
|
* If the Perl function returned an arrayref, we pretend that it
|
|
* called return_next() for each element of the array, to handle old
|
|
* SRFs that didn't know about return_next(). Any other sort of return
|
|
* value is an error, except undef which means return an empty set.
|
|
*/
|
|
sav = get_perl_array_ref(perlret);
|
|
if (sav)
|
|
{
|
|
dTHX;
|
|
int i = 0;
|
|
SV **svp = 0;
|
|
AV *rav = (AV *) SvRV(sav);
|
|
|
|
while ((svp = av_fetch(rav, i, FALSE)) != NULL)
|
|
{
|
|
plperl_return_next_internal(*svp);
|
|
i++;
|
|
}
|
|
}
|
|
else if (SvOK(perlret))
|
|
{
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_DATATYPE_MISMATCH),
|
|
errmsg("set-returning PL/Perl function must return "
|
|
"reference to array or use return_next")));
|
|
}
|
|
|
|
rsi->returnMode = SFRM_Materialize;
|
|
if (current_call_data->tuple_store)
|
|
{
|
|
rsi->setResult = current_call_data->tuple_store;
|
|
rsi->setDesc = current_call_data->ret_tdesc;
|
|
}
|
|
retval = (Datum) 0;
|
|
}
|
|
else if (prodesc->result_oid)
|
|
{
|
|
retval = plperl_sv_to_datum(perlret,
|
|
prodesc->result_oid,
|
|
-1,
|
|
fcinfo,
|
|
&prodesc->result_in_func,
|
|
prodesc->result_typioparam,
|
|
&fcinfo->isnull);
|
|
|
|
if (fcinfo->isnull && rsi && IsA(rsi, ReturnSetInfo))
|
|
rsi->isDone = ExprEndResult;
|
|
}
|
|
|
|
/* Restore the previous error callback */
|
|
error_context_stack = pl_error_context.previous;
|
|
|
|
SvREFCNT_dec_current(perlret);
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
static Datum
|
|
plperl_trigger_handler(PG_FUNCTION_ARGS)
|
|
{
|
|
plperl_proc_desc *prodesc;
|
|
SV *perlret;
|
|
Datum retval;
|
|
SV *svTD;
|
|
HV *hvTD;
|
|
ErrorContextCallback pl_error_context;
|
|
TriggerData *tdata;
|
|
int rc PG_USED_FOR_ASSERTS_ONLY;
|
|
|
|
/* Connect to SPI manager */
|
|
if (SPI_connect() != SPI_OK_CONNECT)
|
|
elog(ERROR, "could not connect to SPI manager");
|
|
|
|
/* Make transition tables visible to this SPI connection */
|
|
tdata = (TriggerData *) fcinfo->context;
|
|
rc = SPI_register_trigger_data(tdata);
|
|
Assert(rc >= 0);
|
|
|
|
/* Find or compile the function */
|
|
prodesc = compile_plperl_function(fcinfo->flinfo->fn_oid, true, false);
|
|
current_call_data->prodesc = prodesc;
|
|
increment_prodesc_refcount(prodesc);
|
|
|
|
/* Set a callback for error reporting */
|
|
pl_error_context.callback = plperl_exec_callback;
|
|
pl_error_context.previous = error_context_stack;
|
|
pl_error_context.arg = prodesc->proname;
|
|
error_context_stack = &pl_error_context;
|
|
|
|
activate_interpreter(prodesc->interp);
|
|
|
|
svTD = plperl_trigger_build_args(fcinfo);
|
|
perlret = plperl_call_perl_trigger_func(prodesc, fcinfo, svTD);
|
|
hvTD = (HV *) SvRV(svTD);
|
|
|
|
/************************************************************
|
|
* Disconnect from SPI manager and then create the return
|
|
* values datum (if the input function does a palloc for it
|
|
* this must not be allocated in the SPI memory context
|
|
* because SPI_finish would free it).
|
|
************************************************************/
|
|
if (SPI_finish() != SPI_OK_FINISH)
|
|
elog(ERROR, "SPI_finish() failed");
|
|
|
|
if (perlret == NULL || !SvOK(perlret))
|
|
{
|
|
/* undef result means go ahead with original tuple */
|
|
TriggerData *trigdata = ((TriggerData *) fcinfo->context);
|
|
|
|
if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
|
|
retval = (Datum) trigdata->tg_trigtuple;
|
|
else if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
|
|
retval = (Datum) trigdata->tg_newtuple;
|
|
else if (TRIGGER_FIRED_BY_DELETE(trigdata->tg_event))
|
|
retval = (Datum) trigdata->tg_trigtuple;
|
|
else if (TRIGGER_FIRED_BY_TRUNCATE(trigdata->tg_event))
|
|
retval = (Datum) trigdata->tg_trigtuple;
|
|
else
|
|
retval = (Datum) 0; /* can this happen? */
|
|
}
|
|
else
|
|
{
|
|
HeapTuple trv;
|
|
char *tmp;
|
|
|
|
tmp = sv2cstr(perlret);
|
|
|
|
if (pg_strcasecmp(tmp, "SKIP") == 0)
|
|
trv = NULL;
|
|
else if (pg_strcasecmp(tmp, "MODIFY") == 0)
|
|
{
|
|
TriggerData *trigdata = (TriggerData *) fcinfo->context;
|
|
|
|
if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
|
|
trv = plperl_modify_tuple(hvTD, trigdata,
|
|
trigdata->tg_trigtuple);
|
|
else if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
|
|
trv = plperl_modify_tuple(hvTD, trigdata,
|
|
trigdata->tg_newtuple);
|
|
else
|
|
{
|
|
ereport(WARNING,
|
|
(errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
|
|
errmsg("ignoring modified row in DELETE trigger")));
|
|
trv = NULL;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
|
|
errmsg("result of PL/Perl trigger function must be undef, "
|
|
"\"SKIP\", or \"MODIFY\"")));
|
|
trv = NULL;
|
|
}
|
|
retval = PointerGetDatum(trv);
|
|
pfree(tmp);
|
|
}
|
|
|
|
/* Restore the previous error callback */
|
|
error_context_stack = pl_error_context.previous;
|
|
|
|
SvREFCNT_dec_current(svTD);
|
|
if (perlret)
|
|
SvREFCNT_dec_current(perlret);
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
static void
|
|
plperl_event_trigger_handler(PG_FUNCTION_ARGS)
|
|
{
|
|
plperl_proc_desc *prodesc;
|
|
SV *svTD;
|
|
ErrorContextCallback pl_error_context;
|
|
|
|
/* Connect to SPI manager */
|
|
if (SPI_connect() != SPI_OK_CONNECT)
|
|
elog(ERROR, "could not connect to SPI manager");
|
|
|
|
/* Find or compile the function */
|
|
prodesc = compile_plperl_function(fcinfo->flinfo->fn_oid, false, true);
|
|
current_call_data->prodesc = prodesc;
|
|
increment_prodesc_refcount(prodesc);
|
|
|
|
/* Set a callback for error reporting */
|
|
pl_error_context.callback = plperl_exec_callback;
|
|
pl_error_context.previous = error_context_stack;
|
|
pl_error_context.arg = prodesc->proname;
|
|
error_context_stack = &pl_error_context;
|
|
|
|
activate_interpreter(prodesc->interp);
|
|
|
|
svTD = plperl_event_trigger_build_args(fcinfo);
|
|
plperl_call_perl_event_trigger_func(prodesc, fcinfo, svTD);
|
|
|
|
if (SPI_finish() != SPI_OK_FINISH)
|
|
elog(ERROR, "SPI_finish() failed");
|
|
|
|
/* Restore the previous error callback */
|
|
error_context_stack = pl_error_context.previous;
|
|
|
|
SvREFCNT_dec_current(svTD);
|
|
}
|
|
|
|
|
|
static bool
|
|
validate_plperl_function(plperl_proc_ptr *proc_ptr, HeapTuple procTup)
|
|
{
|
|
if (proc_ptr && proc_ptr->proc_ptr)
|
|
{
|
|
plperl_proc_desc *prodesc = proc_ptr->proc_ptr;
|
|
bool uptodate;
|
|
|
|
/************************************************************
|
|
* If it's present, must check whether it's still up to date.
|
|
* This is needed because CREATE OR REPLACE FUNCTION can modify the
|
|
* function's pg_proc entry without changing its OID.
|
|
************************************************************/
|
|
uptodate = (prodesc->fn_xmin == HeapTupleHeaderGetRawXmin(procTup->t_data) &&
|
|
ItemPointerEquals(&prodesc->fn_tid, &procTup->t_self));
|
|
|
|
if (uptodate)
|
|
return true;
|
|
|
|
/* Otherwise, unlink the obsoleted entry from the hashtable ... */
|
|
proc_ptr->proc_ptr = NULL;
|
|
/* ... and release the corresponding refcount, probably deleting it */
|
|
decrement_prodesc_refcount(prodesc);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
static void
|
|
free_plperl_function(plperl_proc_desc *prodesc)
|
|
{
|
|
Assert(prodesc->fn_refcount == 0);
|
|
/* Release CODE reference, if we have one, from the appropriate interp */
|
|
if (prodesc->reference)
|
|
{
|
|
plperl_interp_desc *oldinterp = plperl_active_interp;
|
|
|
|
activate_interpreter(prodesc->interp);
|
|
SvREFCNT_dec_current(prodesc->reference);
|
|
activate_interpreter(oldinterp);
|
|
}
|
|
/* Release all PG-owned data for this proc */
|
|
MemoryContextDelete(prodesc->fn_cxt);
|
|
}
|
|
|
|
|
|
static plperl_proc_desc *
|
|
compile_plperl_function(Oid fn_oid, bool is_trigger, bool is_event_trigger)
|
|
{
|
|
HeapTuple procTup;
|
|
Form_pg_proc procStruct;
|
|
plperl_proc_key proc_key;
|
|
plperl_proc_ptr *proc_ptr;
|
|
plperl_proc_desc *volatile prodesc = NULL;
|
|
volatile MemoryContext proc_cxt = NULL;
|
|
plperl_interp_desc *oldinterp = plperl_active_interp;
|
|
ErrorContextCallback plperl_error_context;
|
|
|
|
/* We'll need the pg_proc tuple in any case... */
|
|
procTup = SearchSysCache1(PROCOID, ObjectIdGetDatum(fn_oid));
|
|
if (!HeapTupleIsValid(procTup))
|
|
elog(ERROR, "cache lookup failed for function %u", fn_oid);
|
|
procStruct = (Form_pg_proc) GETSTRUCT(procTup);
|
|
|
|
/*
|
|
* Try to find function in plperl_proc_hash. The reason for this
|
|
* overcomplicated-seeming lookup procedure is that we don't know whether
|
|
* it's plperl or plperlu, and don't want to spend a lookup in pg_language
|
|
* to find out.
|
|
*/
|
|
proc_key.proc_id = fn_oid;
|
|
proc_key.is_trigger = is_trigger;
|
|
proc_key.user_id = GetUserId();
|
|
proc_ptr = hash_search(plperl_proc_hash, &proc_key,
|
|
HASH_FIND, NULL);
|
|
if (validate_plperl_function(proc_ptr, procTup))
|
|
{
|
|
/* Found valid plperl entry */
|
|
ReleaseSysCache(procTup);
|
|
return proc_ptr->proc_ptr;
|
|
}
|
|
|
|
/* If not found or obsolete, maybe it's plperlu */
|
|
proc_key.user_id = InvalidOid;
|
|
proc_ptr = hash_search(plperl_proc_hash, &proc_key,
|
|
HASH_FIND, NULL);
|
|
if (validate_plperl_function(proc_ptr, procTup))
|
|
{
|
|
/* Found valid plperlu entry */
|
|
ReleaseSysCache(procTup);
|
|
return proc_ptr->proc_ptr;
|
|
}
|
|
|
|
/************************************************************
|
|
* If we haven't found it in the hashtable, we analyze
|
|
* the function's arguments and return type and store
|
|
* the in-/out-functions in the prodesc block,
|
|
* then we load the procedure into the Perl interpreter,
|
|
* and last we create a new hashtable entry for it.
|
|
************************************************************/
|
|
|
|
/* Set a callback for reporting compilation errors */
|
|
plperl_error_context.callback = plperl_compile_callback;
|
|
plperl_error_context.previous = error_context_stack;
|
|
plperl_error_context.arg = NameStr(procStruct->proname);
|
|
error_context_stack = &plperl_error_context;
|
|
|
|
PG_TRY();
|
|
{
|
|
HeapTuple langTup;
|
|
HeapTuple typeTup;
|
|
Form_pg_language langStruct;
|
|
Form_pg_type typeStruct;
|
|
Datum protrftypes_datum;
|
|
Datum prosrcdatum;
|
|
bool isnull;
|
|
char *proc_source;
|
|
MemoryContext oldcontext;
|
|
|
|
/************************************************************
|
|
* Allocate a context that will hold all PG data for the procedure.
|
|
************************************************************/
|
|
proc_cxt = AllocSetContextCreate(TopMemoryContext,
|
|
"PL/Perl function",
|
|
ALLOCSET_SMALL_SIZES);
|
|
|
|
/************************************************************
|
|
* Allocate and fill a new procedure description block.
|
|
* struct prodesc and subsidiary data must all live in proc_cxt.
|
|
************************************************************/
|
|
oldcontext = MemoryContextSwitchTo(proc_cxt);
|
|
prodesc = (plperl_proc_desc *) palloc0(sizeof(plperl_proc_desc));
|
|
prodesc->proname = pstrdup(NameStr(procStruct->proname));
|
|
MemoryContextSetIdentifier(proc_cxt, prodesc->proname);
|
|
prodesc->fn_cxt = proc_cxt;
|
|
prodesc->fn_refcount = 0;
|
|
prodesc->fn_xmin = HeapTupleHeaderGetRawXmin(procTup->t_data);
|
|
prodesc->fn_tid = procTup->t_self;
|
|
prodesc->nargs = procStruct->pronargs;
|
|
prodesc->arg_out_func = (FmgrInfo *) palloc0(prodesc->nargs * sizeof(FmgrInfo));
|
|
prodesc->arg_is_rowtype = (bool *) palloc0(prodesc->nargs * sizeof(bool));
|
|
prodesc->arg_arraytype = (Oid *) palloc0(prodesc->nargs * sizeof(Oid));
|
|
MemoryContextSwitchTo(oldcontext);
|
|
|
|
/* Remember if function is STABLE/IMMUTABLE */
|
|
prodesc->fn_readonly =
|
|
(procStruct->provolatile != PROVOLATILE_VOLATILE);
|
|
|
|
/* Fetch protrftypes */
|
|
protrftypes_datum = SysCacheGetAttr(PROCOID, procTup,
|
|
Anum_pg_proc_protrftypes, &isnull);
|
|
MemoryContextSwitchTo(proc_cxt);
|
|
prodesc->trftypes = isnull ? NIL : oid_array_to_list(protrftypes_datum);
|
|
MemoryContextSwitchTo(oldcontext);
|
|
|
|
/************************************************************
|
|
* Lookup the pg_language tuple by Oid
|
|
************************************************************/
|
|
langTup = SearchSysCache1(LANGOID,
|
|
ObjectIdGetDatum(procStruct->prolang));
|
|
if (!HeapTupleIsValid(langTup))
|
|
elog(ERROR, "cache lookup failed for language %u",
|
|
procStruct->prolang);
|
|
langStruct = (Form_pg_language) GETSTRUCT(langTup);
|
|
prodesc->lang_oid = langStruct->oid;
|
|
prodesc->lanpltrusted = langStruct->lanpltrusted;
|
|
ReleaseSysCache(langTup);
|
|
|
|
/************************************************************
|
|
* Get the required information for input conversion of the
|
|
* return value.
|
|
************************************************************/
|
|
if (!is_trigger && !is_event_trigger)
|
|
{
|
|
Oid rettype = procStruct->prorettype;
|
|
|
|
typeTup = SearchSysCache1(TYPEOID, ObjectIdGetDatum(rettype));
|
|
if (!HeapTupleIsValid(typeTup))
|
|
elog(ERROR, "cache lookup failed for type %u", rettype);
|
|
typeStruct = (Form_pg_type) GETSTRUCT(typeTup);
|
|
|
|
/* Disallow pseudotype result, except VOID or RECORD */
|
|
if (typeStruct->typtype == TYPTYPE_PSEUDO)
|
|
{
|
|
if (rettype == VOIDOID ||
|
|
rettype == RECORDOID)
|
|
/* okay */ ;
|
|
else if (rettype == TRIGGEROID ||
|
|
rettype == EVTTRIGGEROID)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("trigger functions can only be called "
|
|
"as triggers")));
|
|
else
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("PL/Perl functions cannot return type %s",
|
|
format_type_be(rettype))));
|
|
}
|
|
|
|
prodesc->result_oid = rettype;
|
|
prodesc->fn_retisset = procStruct->proretset;
|
|
prodesc->fn_retistuple = type_is_rowtype(rettype);
|
|
|
|
prodesc->fn_retisarray =
|
|
(typeStruct->typlen == -1 && typeStruct->typelem);
|
|
|
|
fmgr_info_cxt(typeStruct->typinput,
|
|
&(prodesc->result_in_func),
|
|
proc_cxt);
|
|
prodesc->result_typioparam = getTypeIOParam(typeTup);
|
|
|
|
ReleaseSysCache(typeTup);
|
|
}
|
|
|
|
/************************************************************
|
|
* Get the required information for output conversion
|
|
* of all procedure arguments
|
|
************************************************************/
|
|
if (!is_trigger && !is_event_trigger)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < prodesc->nargs; i++)
|
|
{
|
|
Oid argtype = procStruct->proargtypes.values[i];
|
|
|
|
typeTup = SearchSysCache1(TYPEOID, ObjectIdGetDatum(argtype));
|
|
if (!HeapTupleIsValid(typeTup))
|
|
elog(ERROR, "cache lookup failed for type %u", argtype);
|
|
typeStruct = (Form_pg_type) GETSTRUCT(typeTup);
|
|
|
|
/* Disallow pseudotype argument, except RECORD */
|
|
if (typeStruct->typtype == TYPTYPE_PSEUDO &&
|
|
argtype != RECORDOID)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("PL/Perl functions cannot accept type %s",
|
|
format_type_be(argtype))));
|
|
|
|
if (type_is_rowtype(argtype))
|
|
prodesc->arg_is_rowtype[i] = true;
|
|
else
|
|
{
|
|
prodesc->arg_is_rowtype[i] = false;
|
|
fmgr_info_cxt(typeStruct->typoutput,
|
|
&(prodesc->arg_out_func[i]),
|
|
proc_cxt);
|
|
}
|
|
|
|
/* Identify array-type arguments */
|
|
if (typeStruct->typelem != 0 && typeStruct->typlen == -1)
|
|
prodesc->arg_arraytype[i] = argtype;
|
|
else
|
|
prodesc->arg_arraytype[i] = InvalidOid;
|
|
|
|
ReleaseSysCache(typeTup);
|
|
}
|
|
}
|
|
|
|
/************************************************************
|
|
* create the text of the anonymous subroutine.
|
|
* we do not use a named subroutine so that we can call directly
|
|
* through the reference.
|
|
************************************************************/
|
|
prosrcdatum = SysCacheGetAttr(PROCOID, procTup,
|
|
Anum_pg_proc_prosrc, &isnull);
|
|
if (isnull)
|
|
elog(ERROR, "null prosrc");
|
|
proc_source = TextDatumGetCString(prosrcdatum);
|
|
|
|
/************************************************************
|
|
* Create the procedure in the appropriate interpreter
|
|
************************************************************/
|
|
|
|
select_perl_context(prodesc->lanpltrusted);
|
|
|
|
prodesc->interp = plperl_active_interp;
|
|
|
|
plperl_create_sub(prodesc, proc_source, fn_oid);
|
|
|
|
activate_interpreter(oldinterp);
|
|
|
|
pfree(proc_source);
|
|
|
|
if (!prodesc->reference) /* can this happen? */
|
|
elog(ERROR, "could not create PL/Perl internal procedure");
|
|
|
|
/************************************************************
|
|
* OK, link the procedure into the correct hashtable entry.
|
|
* Note we assume that the hashtable entry either doesn't exist yet,
|
|
* or we already cleared its proc_ptr during the validation attempts
|
|
* above. So no need to decrement an old refcount here.
|
|
************************************************************/
|
|
proc_key.user_id = prodesc->lanpltrusted ? GetUserId() : InvalidOid;
|
|
|
|
proc_ptr = hash_search(plperl_proc_hash, &proc_key,
|
|
HASH_ENTER, NULL);
|
|
/* We assume these two steps can't throw an error: */
|
|
proc_ptr->proc_ptr = prodesc;
|
|
increment_prodesc_refcount(prodesc);
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
/*
|
|
* If we got as far as creating a reference, we should be able to use
|
|
* free_plperl_function() to clean up. If not, then at most we have
|
|
* some PG memory resources in proc_cxt, which we can just delete.
|
|
*/
|
|
if (prodesc && prodesc->reference)
|
|
free_plperl_function(prodesc);
|
|
else if (proc_cxt)
|
|
MemoryContextDelete(proc_cxt);
|
|
|
|
/* Be sure to restore the previous interpreter, too, for luck */
|
|
activate_interpreter(oldinterp);
|
|
|
|
PG_RE_THROW();
|
|
}
|
|
PG_END_TRY();
|
|
|
|
/* restore previous error callback */
|
|
error_context_stack = plperl_error_context.previous;
|
|
|
|
ReleaseSysCache(procTup);
|
|
|
|
return prodesc;
|
|
}
|
|
|
|
/* Build a hash from a given composite/row datum */
|
|
static SV *
|
|
plperl_hash_from_datum(Datum attr)
|
|
{
|
|
HeapTupleHeader td;
|
|
Oid tupType;
|
|
int32 tupTypmod;
|
|
TupleDesc tupdesc;
|
|
HeapTupleData tmptup;
|
|
SV *sv;
|
|
|
|
td = DatumGetHeapTupleHeader(attr);
|
|
|
|
/* Extract rowtype info and find a tupdesc */
|
|
tupType = HeapTupleHeaderGetTypeId(td);
|
|
tupTypmod = HeapTupleHeaderGetTypMod(td);
|
|
tupdesc = lookup_rowtype_tupdesc(tupType, tupTypmod);
|
|
|
|
/* Build a temporary HeapTuple control structure */
|
|
tmptup.t_len = HeapTupleHeaderGetDatumLength(td);
|
|
tmptup.t_data = td;
|
|
|
|
sv = plperl_hash_from_tuple(&tmptup, tupdesc, true);
|
|
ReleaseTupleDesc(tupdesc);
|
|
|
|
return sv;
|
|
}
|
|
|
|
/* Build a hash from all attributes of a given tuple. */
|
|
static SV *
|
|
plperl_hash_from_tuple(HeapTuple tuple, TupleDesc tupdesc, bool include_generated)
|
|
{
|
|
dTHX;
|
|
HV *hv;
|
|
int i;
|
|
|
|
/* since this function recurses, it could be driven to stack overflow */
|
|
check_stack_depth();
|
|
|
|
hv = newHV();
|
|
hv_ksplit(hv, tupdesc->natts); /* pre-grow the hash */
|
|
|
|
for (i = 0; i < tupdesc->natts; i++)
|
|
{
|
|
Datum attr;
|
|
bool isnull,
|
|
typisvarlena;
|
|
char *attname;
|
|
Oid typoutput;
|
|
Form_pg_attribute att = TupleDescAttr(tupdesc, i);
|
|
|
|
if (att->attisdropped)
|
|
continue;
|
|
|
|
if (att->attgenerated)
|
|
{
|
|
/* don't include unless requested */
|
|
if (!include_generated)
|
|
continue;
|
|
}
|
|
|
|
attname = NameStr(att->attname);
|
|
attr = heap_getattr(tuple, i + 1, tupdesc, &isnull);
|
|
|
|
if (isnull)
|
|
{
|
|
/*
|
|
* Store (attname => undef) and move on. Note we can't use
|
|
* &PL_sv_undef here; see "AVs, HVs and undefined values" in
|
|
* perlguts for an explanation.
|
|
*/
|
|
hv_store_string(hv, attname, newSV(0));
|
|
continue;
|
|
}
|
|
|
|
if (type_is_rowtype(att->atttypid))
|
|
{
|
|
SV *sv = plperl_hash_from_datum(attr);
|
|
|
|
hv_store_string(hv, attname, sv);
|
|
}
|
|
else
|
|
{
|
|
SV *sv;
|
|
Oid funcid;
|
|
|
|
if (OidIsValid(get_base_element_type(att->atttypid)))
|
|
sv = plperl_ref_from_pg_array(attr, att->atttypid);
|
|
else if ((funcid = get_transform_fromsql(att->atttypid, current_call_data->prodesc->lang_oid, current_call_data->prodesc->trftypes)))
|
|
sv = (SV *) DatumGetPointer(OidFunctionCall1(funcid, attr));
|
|
else
|
|
{
|
|
char *outputstr;
|
|
|
|
/* XXX should have a way to cache these lookups */
|
|
getTypeOutputInfo(att->atttypid, &typoutput, &typisvarlena);
|
|
|
|
outputstr = OidOutputFunctionCall(typoutput, attr);
|
|
sv = cstr2sv(outputstr);
|
|
pfree(outputstr);
|
|
}
|
|
|
|
hv_store_string(hv, attname, sv);
|
|
}
|
|
}
|
|
return newRV_noinc((SV *) hv);
|
|
}
|
|
|
|
|
|
static void
|
|
check_spi_usage_allowed(void)
|
|
{
|
|
/* see comment in plperl_fini() */
|
|
if (plperl_ending)
|
|
{
|
|
/* simple croak as we don't want to involve PostgreSQL code */
|
|
croak("SPI functions can not be used in END blocks");
|
|
}
|
|
}
|
|
|
|
|
|
HV *
|
|
plperl_spi_exec(char *query, int limit)
|
|
{
|
|
HV *ret_hv;
|
|
|
|
/*
|
|
* Execute the query inside a sub-transaction, so we can cope with errors
|
|
* sanely
|
|
*/
|
|
MemoryContext oldcontext = CurrentMemoryContext;
|
|
ResourceOwner oldowner = CurrentResourceOwner;
|
|
|
|
check_spi_usage_allowed();
|
|
|
|
BeginInternalSubTransaction(NULL);
|
|
/* Want to run inside function's memory context */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
|
|
PG_TRY();
|
|
{
|
|
int spi_rv;
|
|
|
|
pg_verifymbstr(query, strlen(query), false);
|
|
|
|
spi_rv = SPI_execute(query, current_call_data->prodesc->fn_readonly,
|
|
limit);
|
|
ret_hv = plperl_spi_execute_fetch_result(SPI_tuptable, SPI_processed,
|
|
spi_rv);
|
|
|
|
/* Commit the inner transaction, return to outer xact context */
|
|
ReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
ErrorData *edata;
|
|
|
|
/* Save error info */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
edata = CopyErrorData();
|
|
FlushErrorState();
|
|
|
|
/* Abort the inner transaction */
|
|
RollbackAndReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/* Punt the error to Perl */
|
|
croak_cstr(edata->message);
|
|
|
|
/* Can't get here, but keep compiler quiet */
|
|
return NULL;
|
|
}
|
|
PG_END_TRY();
|
|
|
|
return ret_hv;
|
|
}
|
|
|
|
|
|
static HV *
|
|
plperl_spi_execute_fetch_result(SPITupleTable *tuptable, uint64 processed,
|
|
int status)
|
|
{
|
|
dTHX;
|
|
HV *result;
|
|
|
|
check_spi_usage_allowed();
|
|
|
|
result = newHV();
|
|
|
|
hv_store_string(result, "status",
|
|
cstr2sv(SPI_result_code_string(status)));
|
|
hv_store_string(result, "processed",
|
|
(processed > (uint64) UV_MAX) ?
|
|
newSVnv((NV) processed) :
|
|
newSVuv((UV) processed));
|
|
|
|
if (status > 0 && tuptable)
|
|
{
|
|
AV *rows;
|
|
SV *row;
|
|
uint64 i;
|
|
|
|
/* Prevent overflow in call to av_extend() */
|
|
if (processed > (uint64) AV_SIZE_MAX)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
|
|
errmsg("query result has too many rows to fit in a Perl array")));
|
|
|
|
rows = newAV();
|
|
av_extend(rows, processed);
|
|
for (i = 0; i < processed; i++)
|
|
{
|
|
row = plperl_hash_from_tuple(tuptable->vals[i], tuptable->tupdesc, true);
|
|
av_push(rows, row);
|
|
}
|
|
hv_store_string(result, "rows",
|
|
newRV_noinc((SV *) rows));
|
|
}
|
|
|
|
SPI_freetuptable(tuptable);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
/*
|
|
* plperl_return_next catches any error and converts it to a Perl error.
|
|
* We assume (perhaps without adequate justification) that we need not abort
|
|
* the current transaction if the Perl code traps the error.
|
|
*/
|
|
void
|
|
plperl_return_next(SV *sv)
|
|
{
|
|
MemoryContext oldcontext = CurrentMemoryContext;
|
|
|
|
PG_TRY();
|
|
{
|
|
plperl_return_next_internal(sv);
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
ErrorData *edata;
|
|
|
|
/* Must reset elog.c's state */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
edata = CopyErrorData();
|
|
FlushErrorState();
|
|
|
|
/* Punt the error to Perl */
|
|
croak_cstr(edata->message);
|
|
}
|
|
PG_END_TRY();
|
|
}
|
|
|
|
/*
|
|
* plperl_return_next_internal reports any errors in Postgres fashion
|
|
* (via ereport).
|
|
*/
|
|
static void
|
|
plperl_return_next_internal(SV *sv)
|
|
{
|
|
plperl_proc_desc *prodesc;
|
|
FunctionCallInfo fcinfo;
|
|
ReturnSetInfo *rsi;
|
|
MemoryContext old_cxt;
|
|
|
|
if (!sv)
|
|
return;
|
|
|
|
prodesc = current_call_data->prodesc;
|
|
fcinfo = current_call_data->fcinfo;
|
|
rsi = (ReturnSetInfo *) fcinfo->resultinfo;
|
|
|
|
if (!prodesc->fn_retisset)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_SYNTAX_ERROR),
|
|
errmsg("cannot use return_next in a non-SETOF function")));
|
|
|
|
if (!current_call_data->ret_tdesc)
|
|
{
|
|
TupleDesc tupdesc;
|
|
|
|
Assert(!current_call_data->tuple_store);
|
|
|
|
/*
|
|
* This is the first call to return_next in the current PL/Perl
|
|
* function call, so identify the output tuple type and create a
|
|
* tuplestore to hold the result rows.
|
|
*/
|
|
if (prodesc->fn_retistuple)
|
|
{
|
|
TypeFuncClass funcclass;
|
|
Oid typid;
|
|
|
|
funcclass = get_call_result_type(fcinfo, &typid, &tupdesc);
|
|
if (funcclass != TYPEFUNC_COMPOSITE &&
|
|
funcclass != TYPEFUNC_COMPOSITE_DOMAIN)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("function returning record called in context "
|
|
"that cannot accept type record")));
|
|
/* if domain-over-composite, remember the domain's type OID */
|
|
if (funcclass == TYPEFUNC_COMPOSITE_DOMAIN)
|
|
current_call_data->cdomain_oid = typid;
|
|
}
|
|
else
|
|
{
|
|
tupdesc = rsi->expectedDesc;
|
|
/* Protect assumption below that we return exactly one column */
|
|
if (tupdesc == NULL || tupdesc->natts != 1)
|
|
elog(ERROR, "expected single-column result descriptor for non-composite SETOF result");
|
|
}
|
|
|
|
/*
|
|
* Make sure the tuple_store and ret_tdesc are sufficiently
|
|
* long-lived.
|
|
*/
|
|
old_cxt = MemoryContextSwitchTo(rsi->econtext->ecxt_per_query_memory);
|
|
|
|
current_call_data->ret_tdesc = CreateTupleDescCopy(tupdesc);
|
|
current_call_data->tuple_store =
|
|
tuplestore_begin_heap(rsi->allowedModes & SFRM_Materialize_Random,
|
|
false, work_mem);
|
|
|
|
MemoryContextSwitchTo(old_cxt);
|
|
}
|
|
|
|
/*
|
|
* Producing the tuple we want to return requires making plenty of
|
|
* palloc() allocations that are not cleaned up. Since this function can
|
|
* be called many times before the current memory context is reset, we
|
|
* need to do those allocations in a temporary context.
|
|
*/
|
|
if (!current_call_data->tmp_cxt)
|
|
{
|
|
current_call_data->tmp_cxt =
|
|
AllocSetContextCreate(CurrentMemoryContext,
|
|
"PL/Perl return_next temporary cxt",
|
|
ALLOCSET_DEFAULT_SIZES);
|
|
}
|
|
|
|
old_cxt = MemoryContextSwitchTo(current_call_data->tmp_cxt);
|
|
|
|
if (prodesc->fn_retistuple)
|
|
{
|
|
HeapTuple tuple;
|
|
|
|
if (!(SvOK(sv) && SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVHV))
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_DATATYPE_MISMATCH),
|
|
errmsg("SETOF-composite-returning PL/Perl function "
|
|
"must call return_next with reference to hash")));
|
|
|
|
tuple = plperl_build_tuple_result((HV *) SvRV(sv),
|
|
current_call_data->ret_tdesc);
|
|
|
|
if (OidIsValid(current_call_data->cdomain_oid))
|
|
domain_check(HeapTupleGetDatum(tuple), false,
|
|
current_call_data->cdomain_oid,
|
|
¤t_call_data->cdomain_info,
|
|
rsi->econtext->ecxt_per_query_memory);
|
|
|
|
tuplestore_puttuple(current_call_data->tuple_store, tuple);
|
|
}
|
|
else if (prodesc->result_oid)
|
|
{
|
|
Datum ret[1];
|
|
bool isNull[1];
|
|
|
|
ret[0] = plperl_sv_to_datum(sv,
|
|
prodesc->result_oid,
|
|
-1,
|
|
fcinfo,
|
|
&prodesc->result_in_func,
|
|
prodesc->result_typioparam,
|
|
&isNull[0]);
|
|
|
|
tuplestore_putvalues(current_call_data->tuple_store,
|
|
current_call_data->ret_tdesc,
|
|
ret, isNull);
|
|
}
|
|
|
|
MemoryContextSwitchTo(old_cxt);
|
|
MemoryContextReset(current_call_data->tmp_cxt);
|
|
}
|
|
|
|
|
|
SV *
|
|
plperl_spi_query(char *query)
|
|
{
|
|
SV *cursor;
|
|
|
|
/*
|
|
* Execute the query inside a sub-transaction, so we can cope with errors
|
|
* sanely
|
|
*/
|
|
MemoryContext oldcontext = CurrentMemoryContext;
|
|
ResourceOwner oldowner = CurrentResourceOwner;
|
|
|
|
check_spi_usage_allowed();
|
|
|
|
BeginInternalSubTransaction(NULL);
|
|
/* Want to run inside function's memory context */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
|
|
PG_TRY();
|
|
{
|
|
SPIPlanPtr plan;
|
|
Portal portal;
|
|
|
|
/* Make sure the query is validly encoded */
|
|
pg_verifymbstr(query, strlen(query), false);
|
|
|
|
/* Create a cursor for the query */
|
|
plan = SPI_prepare(query, 0, NULL);
|
|
if (plan == NULL)
|
|
elog(ERROR, "SPI_prepare() failed:%s",
|
|
SPI_result_code_string(SPI_result));
|
|
|
|
portal = SPI_cursor_open(NULL, plan, NULL, NULL, false);
|
|
SPI_freeplan(plan);
|
|
if (portal == NULL)
|
|
elog(ERROR, "SPI_cursor_open() failed:%s",
|
|
SPI_result_code_string(SPI_result));
|
|
cursor = cstr2sv(portal->name);
|
|
|
|
PinPortal(portal);
|
|
|
|
/* Commit the inner transaction, return to outer xact context */
|
|
ReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
ErrorData *edata;
|
|
|
|
/* Save error info */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
edata = CopyErrorData();
|
|
FlushErrorState();
|
|
|
|
/* Abort the inner transaction */
|
|
RollbackAndReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/* Punt the error to Perl */
|
|
croak_cstr(edata->message);
|
|
|
|
/* Can't get here, but keep compiler quiet */
|
|
return NULL;
|
|
}
|
|
PG_END_TRY();
|
|
|
|
return cursor;
|
|
}
|
|
|
|
|
|
SV *
|
|
plperl_spi_fetchrow(char *cursor)
|
|
{
|
|
SV *row;
|
|
|
|
/*
|
|
* Execute the FETCH inside a sub-transaction, so we can cope with errors
|
|
* sanely
|
|
*/
|
|
MemoryContext oldcontext = CurrentMemoryContext;
|
|
ResourceOwner oldowner = CurrentResourceOwner;
|
|
|
|
check_spi_usage_allowed();
|
|
|
|
BeginInternalSubTransaction(NULL);
|
|
/* Want to run inside function's memory context */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
|
|
PG_TRY();
|
|
{
|
|
dTHX;
|
|
Portal p = SPI_cursor_find(cursor);
|
|
|
|
if (!p)
|
|
{
|
|
row = &PL_sv_undef;
|
|
}
|
|
else
|
|
{
|
|
SPI_cursor_fetch(p, true, 1);
|
|
if (SPI_processed == 0)
|
|
{
|
|
UnpinPortal(p);
|
|
SPI_cursor_close(p);
|
|
row = &PL_sv_undef;
|
|
}
|
|
else
|
|
{
|
|
row = plperl_hash_from_tuple(SPI_tuptable->vals[0],
|
|
SPI_tuptable->tupdesc,
|
|
true);
|
|
}
|
|
SPI_freetuptable(SPI_tuptable);
|
|
}
|
|
|
|
/* Commit the inner transaction, return to outer xact context */
|
|
ReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
ErrorData *edata;
|
|
|
|
/* Save error info */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
edata = CopyErrorData();
|
|
FlushErrorState();
|
|
|
|
/* Abort the inner transaction */
|
|
RollbackAndReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/* Punt the error to Perl */
|
|
croak_cstr(edata->message);
|
|
|
|
/* Can't get here, but keep compiler quiet */
|
|
return NULL;
|
|
}
|
|
PG_END_TRY();
|
|
|
|
return row;
|
|
}
|
|
|
|
void
|
|
plperl_spi_cursor_close(char *cursor)
|
|
{
|
|
Portal p;
|
|
|
|
check_spi_usage_allowed();
|
|
|
|
p = SPI_cursor_find(cursor);
|
|
|
|
if (p)
|
|
{
|
|
UnpinPortal(p);
|
|
SPI_cursor_close(p);
|
|
}
|
|
}
|
|
|
|
SV *
|
|
plperl_spi_prepare(char *query, int argc, SV **argv)
|
|
{
|
|
volatile SPIPlanPtr plan = NULL;
|
|
volatile MemoryContext plan_cxt = NULL;
|
|
plperl_query_desc *volatile qdesc = NULL;
|
|
plperl_query_entry *volatile hash_entry = NULL;
|
|
MemoryContext oldcontext = CurrentMemoryContext;
|
|
ResourceOwner oldowner = CurrentResourceOwner;
|
|
MemoryContext work_cxt;
|
|
bool found;
|
|
int i;
|
|
|
|
check_spi_usage_allowed();
|
|
|
|
BeginInternalSubTransaction(NULL);
|
|
MemoryContextSwitchTo(oldcontext);
|
|
|
|
PG_TRY();
|
|
{
|
|
CHECK_FOR_INTERRUPTS();
|
|
|
|
/************************************************************
|
|
* Allocate the new querydesc structure
|
|
*
|
|
* The qdesc struct, as well as all its subsidiary data, lives in its
|
|
* plan_cxt. But note that the SPIPlan does not.
|
|
************************************************************/
|
|
plan_cxt = AllocSetContextCreate(TopMemoryContext,
|
|
"PL/Perl spi_prepare query",
|
|
ALLOCSET_SMALL_SIZES);
|
|
MemoryContextSwitchTo(plan_cxt);
|
|
qdesc = (plperl_query_desc *) palloc0(sizeof(plperl_query_desc));
|
|
snprintf(qdesc->qname, sizeof(qdesc->qname), "%p", qdesc);
|
|
qdesc->plan_cxt = plan_cxt;
|
|
qdesc->nargs = argc;
|
|
qdesc->argtypes = (Oid *) palloc(argc * sizeof(Oid));
|
|
qdesc->arginfuncs = (FmgrInfo *) palloc(argc * sizeof(FmgrInfo));
|
|
qdesc->argtypioparams = (Oid *) palloc(argc * sizeof(Oid));
|
|
MemoryContextSwitchTo(oldcontext);
|
|
|
|
/************************************************************
|
|
* Do the following work in a short-lived context so that we don't
|
|
* leak a lot of memory in the PL/Perl function's SPI Proc context.
|
|
************************************************************/
|
|
work_cxt = AllocSetContextCreate(CurrentMemoryContext,
|
|
"PL/Perl spi_prepare workspace",
|
|
ALLOCSET_DEFAULT_SIZES);
|
|
MemoryContextSwitchTo(work_cxt);
|
|
|
|
/************************************************************
|
|
* Resolve argument type names and then look them up by oid
|
|
* in the system cache, and remember the required information
|
|
* for input conversion.
|
|
************************************************************/
|
|
for (i = 0; i < argc; i++)
|
|
{
|
|
Oid typId,
|
|
typInput,
|
|
typIOParam;
|
|
int32 typmod;
|
|
char *typstr;
|
|
|
|
typstr = sv2cstr(argv[i]);
|
|
parseTypeString(typstr, &typId, &typmod, false);
|
|
pfree(typstr);
|
|
|
|
getTypeInputInfo(typId, &typInput, &typIOParam);
|
|
|
|
qdesc->argtypes[i] = typId;
|
|
fmgr_info_cxt(typInput, &(qdesc->arginfuncs[i]), plan_cxt);
|
|
qdesc->argtypioparams[i] = typIOParam;
|
|
}
|
|
|
|
/* Make sure the query is validly encoded */
|
|
pg_verifymbstr(query, strlen(query), false);
|
|
|
|
/************************************************************
|
|
* Prepare the plan and check for errors
|
|
************************************************************/
|
|
plan = SPI_prepare(query, argc, qdesc->argtypes);
|
|
|
|
if (plan == NULL)
|
|
elog(ERROR, "SPI_prepare() failed:%s",
|
|
SPI_result_code_string(SPI_result));
|
|
|
|
/************************************************************
|
|
* Save the plan into permanent memory (right now it's in the
|
|
* SPI procCxt, which will go away at function end).
|
|
************************************************************/
|
|
if (SPI_keepplan(plan))
|
|
elog(ERROR, "SPI_keepplan() failed");
|
|
qdesc->plan = plan;
|
|
|
|
/************************************************************
|
|
* Insert a hashtable entry for the plan.
|
|
************************************************************/
|
|
hash_entry = hash_search(plperl_active_interp->query_hash,
|
|
qdesc->qname,
|
|
HASH_ENTER, &found);
|
|
hash_entry->query_data = qdesc;
|
|
|
|
/* Get rid of workspace */
|
|
MemoryContextDelete(work_cxt);
|
|
|
|
/* Commit the inner transaction, return to outer xact context */
|
|
ReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
ErrorData *edata;
|
|
|
|
/* Save error info */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
edata = CopyErrorData();
|
|
FlushErrorState();
|
|
|
|
/* Drop anything we managed to allocate */
|
|
if (hash_entry)
|
|
hash_search(plperl_active_interp->query_hash,
|
|
qdesc->qname,
|
|
HASH_REMOVE, NULL);
|
|
if (plan_cxt)
|
|
MemoryContextDelete(plan_cxt);
|
|
if (plan)
|
|
SPI_freeplan(plan);
|
|
|
|
/* Abort the inner transaction */
|
|
RollbackAndReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/* Punt the error to Perl */
|
|
croak_cstr(edata->message);
|
|
|
|
/* Can't get here, but keep compiler quiet */
|
|
return NULL;
|
|
}
|
|
PG_END_TRY();
|
|
|
|
/************************************************************
|
|
* Return the query's hash key to the caller.
|
|
************************************************************/
|
|
return cstr2sv(qdesc->qname);
|
|
}
|
|
|
|
HV *
|
|
plperl_spi_exec_prepared(char *query, HV *attr, int argc, SV **argv)
|
|
{
|
|
HV *ret_hv;
|
|
SV **sv;
|
|
int i,
|
|
limit,
|
|
spi_rv;
|
|
char *nulls;
|
|
Datum *argvalues;
|
|
plperl_query_desc *qdesc;
|
|
plperl_query_entry *hash_entry;
|
|
|
|
/*
|
|
* Execute the query inside a sub-transaction, so we can cope with errors
|
|
* sanely
|
|
*/
|
|
MemoryContext oldcontext = CurrentMemoryContext;
|
|
ResourceOwner oldowner = CurrentResourceOwner;
|
|
|
|
check_spi_usage_allowed();
|
|
|
|
BeginInternalSubTransaction(NULL);
|
|
/* Want to run inside function's memory context */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
|
|
PG_TRY();
|
|
{
|
|
dTHX;
|
|
|
|
/************************************************************
|
|
* Fetch the saved plan descriptor, see if it's o.k.
|
|
************************************************************/
|
|
hash_entry = hash_search(plperl_active_interp->query_hash, query,
|
|
HASH_FIND, NULL);
|
|
if (hash_entry == NULL)
|
|
elog(ERROR, "spi_exec_prepared: Invalid prepared query passed");
|
|
|
|
qdesc = hash_entry->query_data;
|
|
if (qdesc == NULL)
|
|
elog(ERROR, "spi_exec_prepared: plperl query_hash value vanished");
|
|
|
|
if (qdesc->nargs != argc)
|
|
elog(ERROR, "spi_exec_prepared: expected %d argument(s), %d passed",
|
|
qdesc->nargs, argc);
|
|
|
|
/************************************************************
|
|
* Parse eventual attributes
|
|
************************************************************/
|
|
limit = 0;
|
|
if (attr != NULL)
|
|
{
|
|
sv = hv_fetch_string(attr, "limit");
|
|
if (sv && *sv && SvIOK(*sv))
|
|
limit = SvIV(*sv);
|
|
}
|
|
/************************************************************
|
|
* Set up arguments
|
|
************************************************************/
|
|
if (argc > 0)
|
|
{
|
|
nulls = (char *) palloc(argc);
|
|
argvalues = (Datum *) palloc(argc * sizeof(Datum));
|
|
}
|
|
else
|
|
{
|
|
nulls = NULL;
|
|
argvalues = NULL;
|
|
}
|
|
|
|
for (i = 0; i < argc; i++)
|
|
{
|
|
bool isnull;
|
|
|
|
argvalues[i] = plperl_sv_to_datum(argv[i],
|
|
qdesc->argtypes[i],
|
|
-1,
|
|
NULL,
|
|
&qdesc->arginfuncs[i],
|
|
qdesc->argtypioparams[i],
|
|
&isnull);
|
|
nulls[i] = isnull ? 'n' : ' ';
|
|
}
|
|
|
|
/************************************************************
|
|
* go
|
|
************************************************************/
|
|
spi_rv = SPI_execute_plan(qdesc->plan, argvalues, nulls,
|
|
current_call_data->prodesc->fn_readonly, limit);
|
|
ret_hv = plperl_spi_execute_fetch_result(SPI_tuptable, SPI_processed,
|
|
spi_rv);
|
|
if (argc > 0)
|
|
{
|
|
pfree(argvalues);
|
|
pfree(nulls);
|
|
}
|
|
|
|
/* Commit the inner transaction, return to outer xact context */
|
|
ReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
ErrorData *edata;
|
|
|
|
/* Save error info */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
edata = CopyErrorData();
|
|
FlushErrorState();
|
|
|
|
/* Abort the inner transaction */
|
|
RollbackAndReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/* Punt the error to Perl */
|
|
croak_cstr(edata->message);
|
|
|
|
/* Can't get here, but keep compiler quiet */
|
|
return NULL;
|
|
}
|
|
PG_END_TRY();
|
|
|
|
return ret_hv;
|
|
}
|
|
|
|
SV *
|
|
plperl_spi_query_prepared(char *query, int argc, SV **argv)
|
|
{
|
|
int i;
|
|
char *nulls;
|
|
Datum *argvalues;
|
|
plperl_query_desc *qdesc;
|
|
plperl_query_entry *hash_entry;
|
|
SV *cursor;
|
|
Portal portal = NULL;
|
|
|
|
/*
|
|
* Execute the query inside a sub-transaction, so we can cope with errors
|
|
* sanely
|
|
*/
|
|
MemoryContext oldcontext = CurrentMemoryContext;
|
|
ResourceOwner oldowner = CurrentResourceOwner;
|
|
|
|
check_spi_usage_allowed();
|
|
|
|
BeginInternalSubTransaction(NULL);
|
|
/* Want to run inside function's memory context */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
|
|
PG_TRY();
|
|
{
|
|
/************************************************************
|
|
* Fetch the saved plan descriptor, see if it's o.k.
|
|
************************************************************/
|
|
hash_entry = hash_search(plperl_active_interp->query_hash, query,
|
|
HASH_FIND, NULL);
|
|
if (hash_entry == NULL)
|
|
elog(ERROR, "spi_query_prepared: Invalid prepared query passed");
|
|
|
|
qdesc = hash_entry->query_data;
|
|
if (qdesc == NULL)
|
|
elog(ERROR, "spi_query_prepared: plperl query_hash value vanished");
|
|
|
|
if (qdesc->nargs != argc)
|
|
elog(ERROR, "spi_query_prepared: expected %d argument(s), %d passed",
|
|
qdesc->nargs, argc);
|
|
|
|
/************************************************************
|
|
* Set up arguments
|
|
************************************************************/
|
|
if (argc > 0)
|
|
{
|
|
nulls = (char *) palloc(argc);
|
|
argvalues = (Datum *) palloc(argc * sizeof(Datum));
|
|
}
|
|
else
|
|
{
|
|
nulls = NULL;
|
|
argvalues = NULL;
|
|
}
|
|
|
|
for (i = 0; i < argc; i++)
|
|
{
|
|
bool isnull;
|
|
|
|
argvalues[i] = plperl_sv_to_datum(argv[i],
|
|
qdesc->argtypes[i],
|
|
-1,
|
|
NULL,
|
|
&qdesc->arginfuncs[i],
|
|
qdesc->argtypioparams[i],
|
|
&isnull);
|
|
nulls[i] = isnull ? 'n' : ' ';
|
|
}
|
|
|
|
/************************************************************
|
|
* go
|
|
************************************************************/
|
|
portal = SPI_cursor_open(NULL, qdesc->plan, argvalues, nulls,
|
|
current_call_data->prodesc->fn_readonly);
|
|
if (argc > 0)
|
|
{
|
|
pfree(argvalues);
|
|
pfree(nulls);
|
|
}
|
|
if (portal == NULL)
|
|
elog(ERROR, "SPI_cursor_open() failed:%s",
|
|
SPI_result_code_string(SPI_result));
|
|
|
|
cursor = cstr2sv(portal->name);
|
|
|
|
PinPortal(portal);
|
|
|
|
/* Commit the inner transaction, return to outer xact context */
|
|
ReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
ErrorData *edata;
|
|
|
|
/* Save error info */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
edata = CopyErrorData();
|
|
FlushErrorState();
|
|
|
|
/* Abort the inner transaction */
|
|
RollbackAndReleaseCurrentSubTransaction();
|
|
MemoryContextSwitchTo(oldcontext);
|
|
CurrentResourceOwner = oldowner;
|
|
|
|
/* Punt the error to Perl */
|
|
croak_cstr(edata->message);
|
|
|
|
/* Can't get here, but keep compiler quiet */
|
|
return NULL;
|
|
}
|
|
PG_END_TRY();
|
|
|
|
return cursor;
|
|
}
|
|
|
|
void
|
|
plperl_spi_freeplan(char *query)
|
|
{
|
|
SPIPlanPtr plan;
|
|
plperl_query_desc *qdesc;
|
|
plperl_query_entry *hash_entry;
|
|
|
|
check_spi_usage_allowed();
|
|
|
|
hash_entry = hash_search(plperl_active_interp->query_hash, query,
|
|
HASH_FIND, NULL);
|
|
if (hash_entry == NULL)
|
|
elog(ERROR, "spi_freeplan: Invalid prepared query passed");
|
|
|
|
qdesc = hash_entry->query_data;
|
|
if (qdesc == NULL)
|
|
elog(ERROR, "spi_freeplan: plperl query_hash value vanished");
|
|
plan = qdesc->plan;
|
|
|
|
/*
|
|
* free all memory before SPI_freeplan, so if it dies, nothing will be
|
|
* left over
|
|
*/
|
|
hash_search(plperl_active_interp->query_hash, query,
|
|
HASH_REMOVE, NULL);
|
|
|
|
MemoryContextDelete(qdesc->plan_cxt);
|
|
|
|
SPI_freeplan(plan);
|
|
}
|
|
|
|
void
|
|
plperl_spi_commit(void)
|
|
{
|
|
MemoryContext oldcontext = CurrentMemoryContext;
|
|
|
|
PG_TRY();
|
|
{
|
|
SPI_commit();
|
|
SPI_start_transaction();
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
ErrorData *edata;
|
|
|
|
/* Save error info */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
edata = CopyErrorData();
|
|
FlushErrorState();
|
|
|
|
/* Punt the error to Perl */
|
|
croak_cstr(edata->message);
|
|
}
|
|
PG_END_TRY();
|
|
}
|
|
|
|
void
|
|
plperl_spi_rollback(void)
|
|
{
|
|
MemoryContext oldcontext = CurrentMemoryContext;
|
|
|
|
PG_TRY();
|
|
{
|
|
SPI_rollback();
|
|
SPI_start_transaction();
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
ErrorData *edata;
|
|
|
|
/* Save error info */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
edata = CopyErrorData();
|
|
FlushErrorState();
|
|
|
|
/* Punt the error to Perl */
|
|
croak_cstr(edata->message);
|
|
}
|
|
PG_END_TRY();
|
|
}
|
|
|
|
/*
|
|
* Implementation of plperl's elog() function
|
|
*
|
|
* If the error level is less than ERROR, we'll just emit the message and
|
|
* return. When it is ERROR, elog() will longjmp, which we catch and
|
|
* turn into a Perl croak(). Note we are assuming that elog() can't have
|
|
* any internal failures that are so bad as to require a transaction abort.
|
|
*
|
|
* The main reason this is out-of-line is to avoid conflicts between XSUB.h
|
|
* and the PG_TRY macros.
|
|
*/
|
|
void
|
|
plperl_util_elog(int level, SV *msg)
|
|
{
|
|
MemoryContext oldcontext = CurrentMemoryContext;
|
|
char *volatile cmsg = NULL;
|
|
|
|
PG_TRY();
|
|
{
|
|
cmsg = sv2cstr(msg);
|
|
elog(level, "%s", cmsg);
|
|
pfree(cmsg);
|
|
}
|
|
PG_CATCH();
|
|
{
|
|
ErrorData *edata;
|
|
|
|
/* Must reset elog.c's state */
|
|
MemoryContextSwitchTo(oldcontext);
|
|
edata = CopyErrorData();
|
|
FlushErrorState();
|
|
|
|
if (cmsg)
|
|
pfree(cmsg);
|
|
|
|
/* Punt the error to Perl */
|
|
croak_cstr(edata->message);
|
|
}
|
|
PG_END_TRY();
|
|
}
|
|
|
|
/*
|
|
* Store an SV into a hash table under a key that is a string assumed to be
|
|
* in the current database's encoding.
|
|
*/
|
|
static SV **
|
|
hv_store_string(HV *hv, const char *key, SV *val)
|
|
{
|
|
dTHX;
|
|
int32 hlen;
|
|
char *hkey;
|
|
SV **ret;
|
|
|
|
hkey = pg_server_to_any(key, strlen(key), PG_UTF8);
|
|
|
|
/*
|
|
* hv_store() recognizes a negative klen parameter as meaning a UTF-8
|
|
* encoded key.
|
|
*/
|
|
hlen = -(int) strlen(hkey);
|
|
ret = hv_store(hv, hkey, hlen, val, 0);
|
|
|
|
if (hkey != key)
|
|
pfree(hkey);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Fetch an SV from a hash table under a key that is a string assumed to be
|
|
* in the current database's encoding.
|
|
*/
|
|
static SV **
|
|
hv_fetch_string(HV *hv, const char *key)
|
|
{
|
|
dTHX;
|
|
int32 hlen;
|
|
char *hkey;
|
|
SV **ret;
|
|
|
|
hkey = pg_server_to_any(key, strlen(key), PG_UTF8);
|
|
|
|
/* See notes in hv_store_string */
|
|
hlen = -(int) strlen(hkey);
|
|
ret = hv_fetch(hv, hkey, hlen, 0);
|
|
|
|
if (hkey != key)
|
|
pfree(hkey);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Provide function name for PL/Perl execution errors
|
|
*/
|
|
static void
|
|
plperl_exec_callback(void *arg)
|
|
{
|
|
char *procname = (char *) arg;
|
|
|
|
if (procname)
|
|
errcontext("PL/Perl function \"%s\"", procname);
|
|
}
|
|
|
|
/*
|
|
* Provide function name for PL/Perl compilation errors
|
|
*/
|
|
static void
|
|
plperl_compile_callback(void *arg)
|
|
{
|
|
char *procname = (char *) arg;
|
|
|
|
if (procname)
|
|
errcontext("compilation of PL/Perl function \"%s\"", procname);
|
|
}
|
|
|
|
/*
|
|
* Provide error context for the inline handler
|
|
*/
|
|
static void
|
|
plperl_inline_callback(void *arg)
|
|
{
|
|
errcontext("PL/Perl anonymous code block");
|
|
}
|
|
|
|
|
|
/*
|
|
* Perl's own setlocale(), copied from POSIX.xs
|
|
* (needed because of the calls to new_*())
|
|
*/
|
|
#ifdef WIN32
|
|
static char *
|
|
setlocale_perl(int category, char *locale)
|
|
{
|
|
dTHX;
|
|
char *RETVAL = setlocale(category, locale);
|
|
|
|
if (RETVAL)
|
|
{
|
|
#ifdef USE_LOCALE_CTYPE
|
|
if (category == LC_CTYPE
|
|
#ifdef LC_ALL
|
|
|| category == LC_ALL
|
|
#endif
|
|
)
|
|
{
|
|
char *newctype;
|
|
|
|
#ifdef LC_ALL
|
|
if (category == LC_ALL)
|
|
newctype = setlocale(LC_CTYPE, NULL);
|
|
else
|
|
#endif
|
|
newctype = RETVAL;
|
|
new_ctype(newctype);
|
|
}
|
|
#endif /* USE_LOCALE_CTYPE */
|
|
#ifdef USE_LOCALE_COLLATE
|
|
if (category == LC_COLLATE
|
|
#ifdef LC_ALL
|
|
|| category == LC_ALL
|
|
#endif
|
|
)
|
|
{
|
|
char *newcoll;
|
|
|
|
#ifdef LC_ALL
|
|
if (category == LC_ALL)
|
|
newcoll = setlocale(LC_COLLATE, NULL);
|
|
else
|
|
#endif
|
|
newcoll = RETVAL;
|
|
new_collate(newcoll);
|
|
}
|
|
#endif /* USE_LOCALE_COLLATE */
|
|
|
|
#ifdef USE_LOCALE_NUMERIC
|
|
if (category == LC_NUMERIC
|
|
#ifdef LC_ALL
|
|
|| category == LC_ALL
|
|
#endif
|
|
)
|
|
{
|
|
char *newnum;
|
|
|
|
#ifdef LC_ALL
|
|
if (category == LC_ALL)
|
|
newnum = setlocale(LC_NUMERIC, NULL);
|
|
else
|
|
#endif
|
|
newnum = RETVAL;
|
|
new_numeric(newnum);
|
|
}
|
|
#endif /* USE_LOCALE_NUMERIC */
|
|
}
|
|
|
|
return RETVAL;
|
|
}
|
|
|
|
#endif /* WIN32 */
|