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95 lines
2.6 KiB
95 lines
2.6 KiB
1 year ago
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/*-------------------------------------------------------------------------
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* stat_utils.c
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*
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* PostgreSQL statistics manipulation utilities.
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*
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* Code supporting the direct manipulation of statistics.
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*
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* Portions Copyright (c) 1996-2024, 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/statistics/stat_utils.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/relation.h"
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#include "catalog/pg_database.h"
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#include "miscadmin.h"
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#include "statistics/stat_utils.h"
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#include "utils/array.h"
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#include "utils/builtins.h"
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#include "utils/acl.h"
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#include "utils/rel.h"
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/*
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* Ensure that a given argument is not null.
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*/
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void
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stats_check_required_arg(FunctionCallInfo fcinfo,
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struct StatsArgInfo *arginfo,
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int argnum)
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{
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if (PG_ARGISNULL(argnum))
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
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errmsg("\"%s\" cannot be NULL",
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arginfo[argnum].argname)));
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}
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/*
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* Lock relation in ShareUpdateExclusive mode, check privileges, and close the
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* relation (but retain the lock).
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*
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* A role has privileges to set statistics on the relation if any of the
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* following are true:
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* - the role owns the current database and the relation is not shared
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* - the role has the MAINTAIN privilege on the relation
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*/
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void
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stats_lock_check_privileges(Oid reloid)
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{
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Relation rel = relation_open(reloid, ShareUpdateExclusiveLock);
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const char relkind = rel->rd_rel->relkind;
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/* All of the types that can be used with ANALYZE, plus indexes */
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switch (relkind)
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{
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case RELKIND_RELATION:
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case RELKIND_INDEX:
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case RELKIND_MATVIEW:
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case RELKIND_FOREIGN_TABLE:
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case RELKIND_PARTITIONED_TABLE:
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case RELKIND_PARTITIONED_INDEX:
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break;
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default:
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ereport(ERROR,
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(errcode(ERRCODE_WRONG_OBJECT_TYPE),
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errmsg("cannot modify statistics for relation \"%s\"",
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RelationGetRelationName(rel)),
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errdetail_relkind_not_supported(rel->rd_rel->relkind)));
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}
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if (rel->rd_rel->relisshared)
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ereport(ERROR,
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(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
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errmsg("cannot modify statistics for shared relation")));
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if (!object_ownercheck(DatabaseRelationId, MyDatabaseId, GetUserId()))
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{
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AclResult aclresult = pg_class_aclcheck(RelationGetRelid(rel),
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GetUserId(),
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ACL_MAINTAIN);
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if (aclresult != ACLCHECK_OK)
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aclcheck_error(aclresult,
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get_relkind_objtype(rel->rd_rel->relkind),
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NameStr(rel->rd_rel->relname));
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}
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relation_close(rel, NoLock);
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}
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