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9fd45870c1
This replaces all MemSet() calls with struct initialization where that is easily and obviously possible. (For example, some cases have to worry about padding bits, so I left those.) (The same could be done with appropriate memset() calls, but this patch is part of an effort to phase out MemSet(), so it doesn't touch memset() calls.) Reviewed-by: Ranier Vilela <ranier.vf@gmail.com> Reviewed-by: Alvaro Herrera <alvherre@alvh.no-ip.org> Discussion: https://www.postgresql.org/message-id/9847b13c-b785-f4e2-75c3-12ec77a3b05c@enterprisedb.com
120 lines
3.7 KiB
C
120 lines
3.7 KiB
C
/*-------------------------------------------------------------------------
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*
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* pg_cast.c
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* routines to support manipulation of the pg_cast relation
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*
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* Portions Copyright (c) 1996-2022, 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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*
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* IDENTIFICATION
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* src/backend/catalog/pg_cast.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/htup_details.h"
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#include "access/table.h"
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#include "catalog/catalog.h"
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#include "catalog/dependency.h"
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#include "catalog/indexing.h"
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#include "catalog/objectaccess.h"
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#include "catalog/pg_cast.h"
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#include "catalog/pg_proc.h"
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#include "catalog/pg_type.h"
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#include "utils/builtins.h"
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#include "utils/rel.h"
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#include "utils/syscache.h"
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/*
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* ----------------------------------------------------------------
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* CastCreate
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*
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* Forms and inserts catalog tuples for a new cast being created.
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* Caller must have already checked privileges, and done consistency
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* checks on the given datatypes and cast function (if applicable).
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*
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* 'behavior' indicates the types of the dependencies that the new
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* cast will have on its input and output types and the cast function.
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* ----------------------------------------------------------------
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*/
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ObjectAddress
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CastCreate(Oid sourcetypeid, Oid targettypeid, Oid funcid, char castcontext,
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char castmethod, DependencyType behavior)
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{
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Relation relation;
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HeapTuple tuple;
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Oid castid;
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Datum values[Natts_pg_cast];
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bool nulls[Natts_pg_cast] = {0};
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ObjectAddress myself,
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referenced;
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ObjectAddresses *addrs;
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relation = table_open(CastRelationId, RowExclusiveLock);
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/*
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* Check for duplicate. This is just to give a friendly error message,
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* the unique index would catch it anyway (so no need to sweat about race
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* conditions).
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*/
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tuple = SearchSysCache2(CASTSOURCETARGET,
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ObjectIdGetDatum(sourcetypeid),
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ObjectIdGetDatum(targettypeid));
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if (HeapTupleIsValid(tuple))
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ereport(ERROR,
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(errcode(ERRCODE_DUPLICATE_OBJECT),
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errmsg("cast from type %s to type %s already exists",
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format_type_be(sourcetypeid),
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format_type_be(targettypeid))));
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/* ready to go */
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castid = GetNewOidWithIndex(relation, CastOidIndexId, Anum_pg_cast_oid);
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values[Anum_pg_cast_oid - 1] = ObjectIdGetDatum(castid);
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values[Anum_pg_cast_castsource - 1] = ObjectIdGetDatum(sourcetypeid);
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values[Anum_pg_cast_casttarget - 1] = ObjectIdGetDatum(targettypeid);
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values[Anum_pg_cast_castfunc - 1] = ObjectIdGetDatum(funcid);
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values[Anum_pg_cast_castcontext - 1] = CharGetDatum(castcontext);
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values[Anum_pg_cast_castmethod - 1] = CharGetDatum(castmethod);
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tuple = heap_form_tuple(RelationGetDescr(relation), values, nulls);
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CatalogTupleInsert(relation, tuple);
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addrs = new_object_addresses();
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/* make dependency entries */
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ObjectAddressSet(myself, CastRelationId, castid);
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/* dependency on source type */
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ObjectAddressSet(referenced, TypeRelationId, sourcetypeid);
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add_exact_object_address(&referenced, addrs);
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/* dependency on target type */
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ObjectAddressSet(referenced, TypeRelationId, targettypeid);
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add_exact_object_address(&referenced, addrs);
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/* dependency on function */
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if (OidIsValid(funcid))
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{
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ObjectAddressSet(referenced, ProcedureRelationId, funcid);
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add_exact_object_address(&referenced, addrs);
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}
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record_object_address_dependencies(&myself, addrs, behavior);
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free_object_addresses(addrs);
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/* dependency on extension */
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recordDependencyOnCurrentExtension(&myself, false);
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/* Post creation hook for new cast */
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InvokeObjectPostCreateHook(CastRelationId, castid, 0);
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heap_freetuple(tuple);
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table_close(relation, RowExclusiveLock);
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return myself;
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}
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