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/*-------------------------------------------------------------------------
*
* regproc.c--
* Functions for the built-in type "RegProcedure".
*
* Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/regproc.c,v 1.6 1997/09/07 04:50:41 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#include <string.h>
#include "postgres.h"
#include "access/heapam.h"
#include "access/relscan.h"
#include "fmgr.h"
#include "utils/palloc.h"
#include "catalog/catname.h"
#include "utils/builtins.h" /* where function declarations go */
/*****************************************************************************
* USER I/O ROUTINES *
*****************************************************************************/
/*
* regprocin - converts "proname" to proid
*
* proid of NULL signifies unknown
*/
int32
regprocin(char *proname)
{
Relation proc;
HeapScanDesc procscan;
HeapTuple proctup;
ScanKeyData key;
RegProcedure result = (Oid) 0;
bool isnull;
if (proname == NULL)
return (0);
proc = heap_openr(ProcedureRelationName);
if (!RelationIsValid(proc))
{
elog(WARN, "regprocin: could not open %s",
ProcedureRelationName);
return (0);
}
ScanKeyEntryInitialize(&key,
(bits16) 0,
(AttrNumber) 1,
(RegProcedure) F_CHAR16EQ,
(Datum) proname);
procscan = heap_beginscan(proc, 0, NowTimeQual, 1, &key);
if (!HeapScanIsValid(procscan))
{
heap_close(proc);
elog(WARN, "regprocin: could not being scan of %s",
ProcedureRelationName);
return (0);
}
proctup = heap_getnext(procscan, 0, (Buffer *) NULL);
switch (HeapTupleIsValid(proctup))
{
case 1:
result = (RegProcedure) heap_getattr(proctup,
InvalidBuffer,
ObjectIdAttributeNumber,
RelationGetTupleDescriptor(proc),
&isnull);
if (isnull)
{
elog(FATAL, "regprocin: null procedure %s", proname);
}
break;
case 0:
result = (RegProcedure) 0;
#ifdef EBUG
elog(DEBUG, "regprocin: no such procedure %s", proname);
#endif /* defined(EBUG) */
}
heap_endscan(procscan);
heap_close(proc);
return ((int32) result);
}
/*
* regprocout - converts proid to "proname"
*/
char *
regprocout(RegProcedure proid)
{
Relation proc;
HeapScanDesc procscan;
HeapTuple proctup;
char *result;
ScanKeyData key;
result = (char *) palloc(NAMEDATALEN);
proc = heap_openr(ProcedureRelationName);
if (!RelationIsValid(proc))
{
elog(WARN, "regprocout: could not open %s",
ProcedureRelationName);
return (0);
}
ScanKeyEntryInitialize(&key,
(bits16) 0,
(AttrNumber) ObjectIdAttributeNumber,
(RegProcedure) F_INT4EQ,
(Datum) proid);
procscan = heap_beginscan(proc, 0, NowTimeQual, 1, &key);
if (!HeapScanIsValid(procscan))
{
heap_close(proc);
elog(WARN, "regprocin: could not being scan of %s",
ProcedureRelationName);
return (0);
}
proctup = heap_getnext(procscan, 0, (Buffer *) NULL);
switch (HeapTupleIsValid(proctup))
{
char *s;
bool isnull;
case 1:
s = (char *) heap_getattr(proctup, InvalidBuffer, 1,
RelationGetTupleDescriptor(proc), &isnull);
if (!isnull)
{
strNcpy(result, s, 16);
break;
}
elog(FATAL, "regprocout: null procedure %d", proid);
/* FALLTHROUGH */
case 0:
result[0] = '-';
result[1] = '\0';
#ifdef EBUG
elog(DEBUG, "regprocout: no such procedure %d", proid);
#endif /* defined(EBUG) */
}
heap_endscan(procscan);
heap_close(proc);
return (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
*/
Oid
regproctooid(RegProcedure rp)
{
return (Oid) rp;
}
/* (see int.c for comparison/operation routines) */
/* ========== PRIVATE ROUTINES ========== */
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