279 lines
9.1 KiB
C
279 lines
9.1 KiB
C
/*-------------------------------------------------------------------------
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*
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* brin_validate.c
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* Opclass validator for BRIN.
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*
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* Portions Copyright (c) 1996-2020, 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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* IDENTIFICATION
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* src/backend/access/brin/brin_validate.c
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include "access/amvalidate.h"
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#include "access/brin_internal.h"
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#include "access/htup_details.h"
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#include "catalog/pg_amop.h"
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#include "catalog/pg_amproc.h"
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#include "catalog/pg_opclass.h"
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#include "catalog/pg_opfamily.h"
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#include "catalog/pg_type.h"
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#include "utils/builtins.h"
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#include "utils/regproc.h"
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#include "utils/syscache.h"
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/*
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* Validator for a BRIN opclass.
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*
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* Some of the checks done here cover the whole opfamily, and therefore are
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* redundant when checking each opclass in a family. But they don't run long
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* enough to be much of a problem, so we accept the duplication rather than
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* complicate the amvalidate API.
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*/
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bool
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brinvalidate(Oid opclassoid)
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{
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bool result = true;
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HeapTuple classtup;
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Form_pg_opclass classform;
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Oid opfamilyoid;
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Oid opcintype;
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char *opclassname;
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HeapTuple familytup;
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Form_pg_opfamily familyform;
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char *opfamilyname;
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CatCList *proclist,
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*oprlist;
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uint64 allfuncs = 0;
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uint64 allops = 0;
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List *grouplist;
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OpFamilyOpFuncGroup *opclassgroup;
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int i;
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ListCell *lc;
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/* Fetch opclass information */
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classtup = SearchSysCache1(CLAOID, ObjectIdGetDatum(opclassoid));
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if (!HeapTupleIsValid(classtup))
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elog(ERROR, "cache lookup failed for operator class %u", opclassoid);
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classform = (Form_pg_opclass) GETSTRUCT(classtup);
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opfamilyoid = classform->opcfamily;
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opcintype = classform->opcintype;
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opclassname = NameStr(classform->opcname);
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/* Fetch opfamily information */
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familytup = SearchSysCache1(OPFAMILYOID, ObjectIdGetDatum(opfamilyoid));
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if (!HeapTupleIsValid(familytup))
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elog(ERROR, "cache lookup failed for operator family %u", opfamilyoid);
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familyform = (Form_pg_opfamily) GETSTRUCT(familytup);
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opfamilyname = NameStr(familyform->opfname);
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/* Fetch all operators and support functions of the opfamily */
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oprlist = SearchSysCacheList1(AMOPSTRATEGY, ObjectIdGetDatum(opfamilyoid));
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proclist = SearchSysCacheList1(AMPROCNUM, ObjectIdGetDatum(opfamilyoid));
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/* Check individual support functions */
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for (i = 0; i < proclist->n_members; i++)
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{
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HeapTuple proctup = &proclist->members[i]->tuple;
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Form_pg_amproc procform = (Form_pg_amproc) GETSTRUCT(proctup);
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bool ok;
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/* Check procedure numbers and function signatures */
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switch (procform->amprocnum)
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{
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case BRIN_PROCNUM_OPCINFO:
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ok = check_amproc_signature(procform->amproc, INTERNALOID, true,
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1, 1, INTERNALOID);
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break;
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case BRIN_PROCNUM_ADDVALUE:
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ok = check_amproc_signature(procform->amproc, BOOLOID, true,
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4, 4, INTERNALOID, INTERNALOID,
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INTERNALOID, INTERNALOID);
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break;
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case BRIN_PROCNUM_CONSISTENT:
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ok = check_amproc_signature(procform->amproc, BOOLOID, true,
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3, 3, INTERNALOID, INTERNALOID,
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INTERNALOID);
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break;
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case BRIN_PROCNUM_UNION:
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ok = check_amproc_signature(procform->amproc, BOOLOID, true,
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3, 3, INTERNALOID, INTERNALOID,
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INTERNALOID);
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break;
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default:
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/* Complain if it's not a valid optional proc number */
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if (procform->amprocnum < BRIN_FIRST_OPTIONAL_PROCNUM ||
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procform->amprocnum > BRIN_LAST_OPTIONAL_PROCNUM)
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{
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ereport(INFO,
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(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
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errmsg("operator family \"%s\" of access method %s contains function %s with invalid support number %d",
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opfamilyname, "brin",
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format_procedure(procform->amproc),
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procform->amprocnum)));
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result = false;
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continue; /* omit bad proc numbers from allfuncs */
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}
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/* Can't check signatures of optional procs, so assume OK */
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ok = true;
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break;
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}
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if (!ok)
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{
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ereport(INFO,
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(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
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errmsg("operator family \"%s\" of access method %s contains function %s with wrong signature for support number %d",
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opfamilyname, "brin",
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format_procedure(procform->amproc),
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procform->amprocnum)));
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result = false;
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}
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/* Track all valid procedure numbers seen in opfamily */
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allfuncs |= ((uint64) 1) << procform->amprocnum;
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}
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/* Check individual operators */
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for (i = 0; i < oprlist->n_members; i++)
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{
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HeapTuple oprtup = &oprlist->members[i]->tuple;
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Form_pg_amop oprform = (Form_pg_amop) GETSTRUCT(oprtup);
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/* Check that only allowed strategy numbers exist */
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if (oprform->amopstrategy < 1 || oprform->amopstrategy > 63)
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{
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ereport(INFO,
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(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
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errmsg("operator family \"%s\" of access method %s contains operator %s with invalid strategy number %d",
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opfamilyname, "brin",
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format_operator(oprform->amopopr),
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oprform->amopstrategy)));
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result = false;
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}
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else
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{
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/*
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* The set of operators supplied varies across BRIN opfamilies.
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* Our plan is to identify all operator strategy numbers used in
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* the opfamily and then complain about datatype combinations that
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* are missing any operator(s). However, consider only numbers
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* that appear in some non-cross-type case, since cross-type
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* operators may have unique strategies. (This is not a great
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* heuristic, in particular an erroneous number used in a
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* cross-type operator will not get noticed; but the core BRIN
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* opfamilies are messy enough to make it necessary.)
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*/
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if (oprform->amoplefttype == oprform->amoprighttype)
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allops |= ((uint64) 1) << oprform->amopstrategy;
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}
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/* brin doesn't support ORDER BY operators */
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if (oprform->amoppurpose != AMOP_SEARCH ||
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OidIsValid(oprform->amopsortfamily))
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{
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ereport(INFO,
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(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
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errmsg("operator family \"%s\" of access method %s contains invalid ORDER BY specification for operator %s",
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opfamilyname, "brin",
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format_operator(oprform->amopopr))));
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result = false;
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}
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/* Check operator signature --- same for all brin strategies */
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if (!check_amop_signature(oprform->amopopr, BOOLOID,
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oprform->amoplefttype,
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oprform->amoprighttype))
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{
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ereport(INFO,
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(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
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errmsg("operator family \"%s\" of access method %s contains operator %s with wrong signature",
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opfamilyname, "brin",
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format_operator(oprform->amopopr))));
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result = false;
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}
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}
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/* Now check for inconsistent groups of operators/functions */
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grouplist = identify_opfamily_groups(oprlist, proclist);
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opclassgroup = NULL;
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foreach(lc, grouplist)
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{
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OpFamilyOpFuncGroup *thisgroup = (OpFamilyOpFuncGroup *) lfirst(lc);
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/* Remember the group exactly matching the test opclass */
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if (thisgroup->lefttype == opcintype &&
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thisgroup->righttype == opcintype)
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opclassgroup = thisgroup;
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/*
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* Some BRIN opfamilies expect cross-type support functions to exist,
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* and some don't. We don't know exactly which are which, so if we
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* find a cross-type operator for which there are no support functions
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* at all, let it pass. (Don't expect that all operators exist for
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* such cross-type cases, either.)
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*/
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if (thisgroup->functionset == 0 &&
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thisgroup->lefttype != thisgroup->righttype)
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continue;
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/*
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* Else complain if there seems to be an incomplete set of either
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* operators or support functions for this datatype pair.
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*/
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if (thisgroup->operatorset != allops)
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{
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ereport(INFO,
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(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
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errmsg("operator family \"%s\" of access method %s is missing operator(s) for types %s and %s",
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opfamilyname, "brin",
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format_type_be(thisgroup->lefttype),
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format_type_be(thisgroup->righttype))));
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result = false;
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}
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if (thisgroup->functionset != allfuncs)
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{
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ereport(INFO,
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(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
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errmsg("operator family \"%s\" of access method %s is missing support function(s) for types %s and %s",
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opfamilyname, "brin",
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format_type_be(thisgroup->lefttype),
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format_type_be(thisgroup->righttype))));
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result = false;
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}
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}
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/* Check that the originally-named opclass is complete */
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if (!opclassgroup || opclassgroup->operatorset != allops)
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{
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ereport(INFO,
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(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
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errmsg("operator class \"%s\" of access method %s is missing operator(s)",
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opclassname, "brin")));
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result = false;
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}
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for (i = 1; i <= BRIN_MANDATORY_NPROCS; i++)
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{
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if (opclassgroup &&
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(opclassgroup->functionset & (((int64) 1) << i)) != 0)
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continue; /* got it */
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ereport(INFO,
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(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
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errmsg("operator class \"%s\" of access method %s is missing support function %d",
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opclassname, "brin", i)));
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result = false;
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}
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ReleaseCatCacheList(proclist);
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ReleaseCatCacheList(oprlist);
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ReleaseSysCache(familytup);
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ReleaseSysCache(classtup);
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return result;
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}
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