190 lines
7.8 KiB
C
190 lines
7.8 KiB
C
/*-------------------------------------------------------------------------
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*
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* lsyscache.h
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* Convenience routines for common queries in the system catalog cache.
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*
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* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/utils/lsyscache.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef LSYSCACHE_H
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#define LSYSCACHE_H
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#include "access/attnum.h"
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#include "access/htup.h"
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#include "nodes/pg_list.h"
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/* Result list element for get_op_btree_interpretation */
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typedef struct OpBtreeInterpretation
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{
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Oid opfamily_id; /* btree opfamily containing operator */
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int strategy; /* its strategy number */
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Oid oplefttype; /* declared left input datatype */
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Oid oprighttype; /* declared right input datatype */
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} OpBtreeInterpretation;
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/* I/O function selector for get_type_io_data */
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typedef enum IOFuncSelector
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{
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IOFunc_input,
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IOFunc_output,
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IOFunc_receive,
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IOFunc_send
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} IOFuncSelector;
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/* Flag bits for get_attstatsslot */
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#define ATTSTATSSLOT_VALUES 0x01
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#define ATTSTATSSLOT_NUMBERS 0x02
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/* Result struct for get_attstatsslot */
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typedef struct AttStatsSlot
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{
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/* Always filled: */
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Oid staop; /* Actual staop for the found slot */
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Oid stacoll; /* Actual collation for the found slot */
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/* Filled if ATTSTATSSLOT_VALUES is specified: */
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Oid valuetype; /* Actual datatype of the values */
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Datum *values; /* slot's "values" array, or NULL if none */
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int nvalues; /* length of values[], or 0 */
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/* Filled if ATTSTATSSLOT_NUMBERS is specified: */
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float4 *numbers; /* slot's "numbers" array, or NULL if none */
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int nnumbers; /* length of numbers[], or 0 */
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/* Remaining fields are private to get_attstatsslot/free_attstatsslot */
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void *values_arr; /* palloc'd values array, if any */
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void *numbers_arr; /* palloc'd numbers array, if any */
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} AttStatsSlot;
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/* Hook for plugins to get control in get_attavgwidth() */
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typedef int32 (*get_attavgwidth_hook_type) (Oid relid, AttrNumber attnum);
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extern PGDLLIMPORT get_attavgwidth_hook_type get_attavgwidth_hook;
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extern bool op_in_opfamily(Oid opno, Oid opfamily);
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extern int get_op_opfamily_strategy(Oid opno, Oid opfamily);
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extern Oid get_op_opfamily_sortfamily(Oid opno, Oid opfamily);
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extern void get_op_opfamily_properties(Oid opno, Oid opfamily, bool ordering_op,
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int *strategy,
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Oid *lefttype,
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Oid *righttype);
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extern Oid get_opfamily_member(Oid opfamily, Oid lefttype, Oid righttype,
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int16 strategy);
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extern bool get_ordering_op_properties(Oid opno,
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Oid *opfamily, Oid *opcintype, int16 *strategy);
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extern Oid get_equality_op_for_ordering_op(Oid opno, bool *reverse);
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extern Oid get_ordering_op_for_equality_op(Oid opno, bool use_lhs_type);
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extern List *get_mergejoin_opfamilies(Oid opno);
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extern bool get_compatible_hash_operators(Oid opno,
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Oid *lhs_opno, Oid *rhs_opno);
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extern bool get_op_hash_functions(Oid opno,
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RegProcedure *lhs_procno, RegProcedure *rhs_procno);
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extern List *get_op_btree_interpretation(Oid opno);
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extern bool equality_ops_are_compatible(Oid opno1, Oid opno2);
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extern Oid get_opfamily_proc(Oid opfamily, Oid lefttype, Oid righttype,
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int16 procnum);
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extern char *get_attname(Oid relid, AttrNumber attnum, bool missing_ok);
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extern AttrNumber get_attnum(Oid relid, const char *attname);
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extern Oid get_atttype(Oid relid, AttrNumber attnum);
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extern void get_atttypetypmodcoll(Oid relid, AttrNumber attnum,
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Oid *typid, int32 *typmod, Oid *collid);
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extern char *get_collation_name(Oid colloid);
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extern bool get_collation_isdeterministic(Oid colloid);
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extern char *get_constraint_name(Oid conoid);
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extern char *get_language_name(Oid langoid, bool missing_ok);
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extern Oid get_opclass_family(Oid opclass);
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extern Oid get_opclass_input_type(Oid opclass);
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extern bool get_opclass_opfamily_and_input_type(Oid opclass,
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Oid *opfamily, Oid *opcintype);
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extern RegProcedure get_opcode(Oid opno);
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extern char *get_opname(Oid opno);
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extern Oid get_op_rettype(Oid opno);
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extern void op_input_types(Oid opno, Oid *lefttype, Oid *righttype);
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extern bool op_mergejoinable(Oid opno, Oid inputtype);
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extern bool op_hashjoinable(Oid opno, Oid inputtype);
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extern bool op_strict(Oid opno);
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extern char op_volatile(Oid opno);
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extern Oid get_commutator(Oid opno);
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extern Oid get_negator(Oid opno);
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extern RegProcedure get_oprrest(Oid opno);
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extern RegProcedure get_oprjoin(Oid opno);
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extern char *get_func_name(Oid funcid);
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extern Oid get_func_namespace(Oid funcid);
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extern Oid get_func_rettype(Oid funcid);
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extern int get_func_nargs(Oid funcid);
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extern Oid get_func_signature(Oid funcid, Oid **argtypes, int *nargs);
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extern Oid get_func_variadictype(Oid funcid);
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extern bool get_func_retset(Oid funcid);
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extern bool func_strict(Oid funcid);
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extern char func_volatile(Oid funcid);
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extern char func_parallel(Oid funcid);
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extern char get_func_prokind(Oid funcid);
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extern bool get_func_leakproof(Oid funcid);
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extern RegProcedure get_func_support(Oid funcid);
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extern Oid get_relname_relid(const char *relname, Oid relnamespace);
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extern char *get_rel_name(Oid relid);
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extern Oid get_rel_namespace(Oid relid);
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extern Oid get_rel_type_id(Oid relid);
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extern char get_rel_relkind(Oid relid);
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extern bool get_rel_relispartition(Oid relid);
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extern Oid get_rel_tablespace(Oid relid);
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extern char get_rel_persistence(Oid relid);
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extern Oid get_transform_fromsql(Oid typid, Oid langid, List *trftypes);
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extern Oid get_transform_tosql(Oid typid, Oid langid, List *trftypes);
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extern bool get_typisdefined(Oid typid);
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extern int16 get_typlen(Oid typid);
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extern bool get_typbyval(Oid typid);
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extern void get_typlenbyval(Oid typid, int16 *typlen, bool *typbyval);
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extern void get_typlenbyvalalign(Oid typid, int16 *typlen, bool *typbyval,
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char *typalign);
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extern Oid getTypeIOParam(HeapTuple typeTuple);
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extern void get_type_io_data(Oid typid,
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IOFuncSelector which_func,
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int16 *typlen,
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bool *typbyval,
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char *typalign,
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char *typdelim,
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Oid *typioparam,
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Oid *func);
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extern char get_typstorage(Oid typid);
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extern Node *get_typdefault(Oid typid);
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extern char get_typtype(Oid typid);
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extern bool type_is_rowtype(Oid typid);
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extern bool type_is_enum(Oid typid);
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extern bool type_is_range(Oid typid);
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extern void get_type_category_preferred(Oid typid,
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char *typcategory,
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bool *typispreferred);
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extern Oid get_typ_typrelid(Oid typid);
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extern Oid get_element_type(Oid typid);
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extern Oid get_array_type(Oid typid);
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extern Oid get_promoted_array_type(Oid typid);
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extern Oid get_base_element_type(Oid typid);
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extern void getTypeInputInfo(Oid type, Oid *typInput, Oid *typIOParam);
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extern void getTypeOutputInfo(Oid type, Oid *typOutput, bool *typIsVarlena);
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extern void getTypeBinaryInputInfo(Oid type, Oid *typReceive, Oid *typIOParam);
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extern void getTypeBinaryOutputInfo(Oid type, Oid *typSend, bool *typIsVarlena);
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extern Oid get_typmodin(Oid typid);
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extern Oid get_typcollation(Oid typid);
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extern bool type_is_collatable(Oid typid);
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extern Oid getBaseType(Oid typid);
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extern Oid getBaseTypeAndTypmod(Oid typid, int32 *typmod);
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extern int32 get_typavgwidth(Oid typid, int32 typmod);
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extern int32 get_attavgwidth(Oid relid, AttrNumber attnum);
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extern bool get_attstatsslot(AttStatsSlot *sslot, HeapTuple statstuple,
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int reqkind, Oid reqop, int flags);
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extern void free_attstatsslot(AttStatsSlot *sslot);
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extern char *get_namespace_name(Oid nspid);
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extern char *get_namespace_name_or_temp(Oid nspid);
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extern Oid get_range_subtype(Oid rangeOid);
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extern Oid get_index_column_opclass(Oid index_oid, int attno);
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#define type_is_array(typid) (get_element_type(typid) != InvalidOid)
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/* type_is_array_domain accepts both plain arrays and domains over arrays */
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#define type_is_array_domain(typid) (get_base_element_type(typid) != InvalidOid)
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#define TypeIsToastable(typid) (get_typstorage(typid) != 'p')
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#endif /* LSYSCACHE_H */
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