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153 lines
4.5 KiB
C
153 lines
4.5 KiB
C
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/*-------------------------------------------------------------------------
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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) 1996-2016, 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/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 "utils/catcache.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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bool
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brinvalidate(Oid opclassoid)
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{
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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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int numclassops;
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int32 classfuncbits;
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CatCList *proclist,
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*oprlist;
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int i,
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j;
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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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ReleaseSysCache(classtup);
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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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/* We'll track the ops and functions belonging to the named opclass */
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numclassops = 0;
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classfuncbits = 0;
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/* Check 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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/* Check that only allowed procedure numbers exist */
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if (procform->amprocnum < 1 ||
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procform->amprocnum > BRIN_LAST_OPTIONAL_PROCNUM)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
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errmsg("brin opfamily %u contains invalid support number %d for procedure %u",
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opfamilyoid,
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procform->amprocnum, procform->amproc)));
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/* Remember functions that are specifically for the named opclass */
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if (procform->amproclefttype == opcintype &&
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procform->amprocrighttype == opcintype)
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classfuncbits |= (1 << procform->amprocnum);
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}
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/* Check 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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bool found = false;
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/* TODO: Check that only allowed strategy numbers exist */
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if (oprform->amopstrategy < 1)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
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errmsg("brin opfamily %u contains invalid strategy number %d for operator %u",
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opfamilyoid,
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oprform->amopstrategy, oprform->amopopr)));
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/* TODO: check more thoroughly for missing support functions */
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for (j = 0; j < proclist->n_members; j++)
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{
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HeapTuple proctup = &proclist->members[j]->tuple;
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Form_pg_amproc procform = (Form_pg_amproc) GETSTRUCT(proctup);
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/* note only the operator's lefttype matters */
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if (procform->amproclefttype == oprform->amoplefttype &&
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procform->amprocrighttype == oprform->amoplefttype)
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{
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found = true;
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break;
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}
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}
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if (!found)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
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errmsg("brin opfamily %u lacks support function for operator %u",
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opfamilyoid, oprform->amopopr)));
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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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ereport(ERROR,
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(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
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errmsg("brin opfamily %u contains invalid ORDER BY specification for operator %u",
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opfamilyoid, oprform->amopopr)));
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/* Count operators that are specifically for the named opclass */
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if (oprform->amoplefttype == opcintype &&
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oprform->amoprighttype == opcintype)
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numclassops++;
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}
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/* Check that the named opclass is complete */
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if (numclassops == 0)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
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errmsg("brin opclass %u is missing operator(s)",
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opclassoid)));
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for (i = 1; i <= BRIN_MANDATORY_NPROCS; i++)
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{
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if ((classfuncbits & (1 << i)) != 0)
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continue; /* got it */
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
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errmsg("brin opclass %u is missing required support function %d",
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opclassoid, i)));
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}
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ReleaseCatCacheList(proclist);
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ReleaseCatCacheList(oprlist);
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return true;
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}
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