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/*-------------------------------------------------------------------------
*
* regproc.c
* Functions for the built-in type "RegProcedure".
*
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/regproc.c,v 1.65 2002/04/05 00:31:29 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/genam.h"
#include "access/heapam.h"
#include "catalog/catname.h"
#include "catalog/indexing.h"
#include "catalog/pg_proc.h"
#include "miscadmin.h"
#include "utils/builtins.h"
#include "utils/fmgroids.h"
#include "utils/syscache.h"
/*****************************************************************************
* USER I/O ROUTINES *
*****************************************************************************/
/*
* regprocin - converts "proname" or "proid" to proid
*
* We need to accept an OID for cases where the name is ambiguous.
*
* proid of '-' signifies unknown, for consistency with regprocout
*/
Datum
regprocin(PG_FUNCTION_ARGS)
{
char *pro_name_or_oid = PG_GETARG_CSTRING(0);
RegProcedure result = InvalidOid;
int matches = 0;
if (pro_name_or_oid[0] == '-' && pro_name_or_oid[1] == '\0')
PG_RETURN_OID(InvalidOid);
if (pro_name_or_oid[0] >= '0' &&
pro_name_or_oid[0] <= '9' &&
strspn(pro_name_or_oid, "0123456789") == strlen(pro_name_or_oid))
{
Oid searchOid;
searchOid = DatumGetObjectId(DirectFunctionCall1(oidin,
CStringGetDatum(pro_name_or_oid)));
result = (RegProcedure) GetSysCacheOid(PROCOID,
ObjectIdGetDatum(searchOid),
0, 0, 0);
if (!RegProcedureIsValid(result))
elog(ERROR, "No procedure with oid %s", pro_name_or_oid);
matches = 1;
}
else
{
Relation hdesc;
ScanKeyData skey[1];
SysScanDesc funcscan;
HeapTuple tuple;
ScanKeyEntryInitialize(&skey[0], 0x0,
(AttrNumber) Anum_pg_proc_proname,
(RegProcedure) F_NAMEEQ,
CStringGetDatum(pro_name_or_oid));
hdesc = heap_openr(ProcedureRelationName, AccessShareLock);
funcscan = systable_beginscan(hdesc, ProcedureNameNspIndex, true,
SnapshotNow, 1, skey);
while (HeapTupleIsValid(tuple = systable_getnext(funcscan)))
{
result = (RegProcedure) tuple->t_data->t_oid;
if (++matches > 1)
break;
}
systable_endscan(funcscan);
heap_close(hdesc, AccessShareLock);
}
if (matches > 1)
elog(ERROR, "There is more than one procedure named %s.\n\tSupply the pg_proc oid inside single quotes.", pro_name_or_oid);
else if (matches == 0)
elog(ERROR, "No procedure with name %s", pro_name_or_oid);
PG_RETURN_OID(result);
}
/*
* regprocout - converts proid to "pro_name"
*/
Datum
regprocout(PG_FUNCTION_ARGS)
{
RegProcedure proid = PG_GETARG_OID(0);
HeapTuple proctup;
char *result;
result = (char *) palloc(NAMEDATALEN);
if (proid == InvalidOid)
{
result[0] = '-';
result[1] = '\0';
PG_RETURN_CSTRING(result);
}
proctup = SearchSysCache(PROCOID,
ObjectIdGetDatum(proid),
0, 0, 0);
if (HeapTupleIsValid(proctup))
{
char *s;
s = NameStr(((Form_pg_proc) GETSTRUCT(proctup))->proname);
StrNCpy(result, s, NAMEDATALEN);
ReleaseSysCache(proctup);
}
else
{
result[0] = '-';
result[1] = '\0';
}
PG_RETURN_CSTRING(result);
}
/*****************************************************************************
* PUBLIC ROUTINES *
*****************************************************************************/
/* regproctooid()
* Lowercase version of RegprocToOid() to allow case-insensitive SQL.
* Define RegprocToOid() as a macro in builtins.h.
* Referenced in pg_proc.h. - tgl 97/04/26
*/
Datum
regproctooid(PG_FUNCTION_ARGS)
{
RegProcedure rp = PG_GETARG_OID(0);
PG_RETURN_OID((Oid) rp);
}
/* (see int.c for comparison/operation routines) */
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