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Use oper_select_candidate() for unary operators

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rather than func_select_candidate().
Fix oper_select_candidate() to work with a single operator argument.
Repair left operator checking for null return from candidate list.
This commit is contained in:
Thomas G. Lockhart
1998-09-16 14:22:22 +00:00
parent 672bc164ce
commit 198bcef025
1 changed files with 24 additions and 18 deletions
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42
src/backend/parser/parse_oper.c
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@@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parse_oper.c,v 1.17 1998/09/01 04:30:34 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parse_oper.c,v 1.18 1998/09/16 14:22:22 thomas Exp $
*
*-------------------------------------------------------------------------
*/
@@ -21,15 +21,13 @@
#include "catalog/pg_operator.h"
#include "catalog/pg_type.h"
#include "fmgr.h"
#include "parser/parse_func.h"
#include "parser/parse_oper.h"
#include "parser/parse_type.h"
#include "parser/parse_coerce.h"
#include "storage/bufmgr.h"
#include "utils/syscache.h"
Oid *
oper_select_candidate(int nargs, Oid *input_typeids, CandidateList candidates);
Oid * oper_select_candidate(int nargs, Oid *input_typeids, CandidateList candidates);
static int binary_oper_get_candidates(char *opname,
Oid leftTypeId,
Oid rightTypeId,
@@ -38,8 +36,7 @@ static int unary_oper_get_candidates(char *op,
Oid typeId,
CandidateList *candidates,
char rightleft);
static void
op_error(char *op, Oid arg1, Oid arg2);
static void op_error(char *op, Oid arg1, Oid arg2);
Oid
any_ordering_op(int restype)
@@ -312,7 +309,7 @@ oper_select_candidate(int nargs,
if (ncandidates <= 1)
{
if (!can_coerce_type(1, &input_typeids[0], &candidates->args[0])
|| !can_coerce_type(1, &input_typeids[1], &candidates->args[1]))
|| ((nargs > 1) && !can_coerce_type(1, &input_typeids[1], &candidates->args[1])))
{
ncandidates = 0;
#ifdef PARSEDEBUG
@@ -718,7 +715,7 @@ right_oper(char *op, Oid arg)
}
else
{
targetOid = func_select_candidate(1, &arg, candidates);
targetOid = oper_select_candidate(1, &arg, candidates);
if (targetOid != NULL)
{
@@ -729,12 +726,14 @@ right_oper(char *op, Oid arg)
CharGetDatum('r'));
}
else
{
tup = NULL;
}
if (!HeapTupleIsValid(tup))
{
elog(ERROR, "Unable to convert right operator '%s' from type %s to %s",
op, typeidTypeName(arg), typeidTypeName(*targetOid));
elog(ERROR, "Unable to convert right operator '%s' from type %s",
op, typeidTypeName(arg));
return NULL;
}
}
@@ -782,17 +781,24 @@ left_oper(char *op, Oid arg)
}
else
{
targetOid = func_select_candidate(1, &arg, candidates);
tup = SearchSysCacheTuple(OPRNAME,
PointerGetDatum(op),
ObjectIdGetDatum(InvalidOid),
ObjectIdGetDatum(*targetOid),
CharGetDatum('l'));
targetOid = oper_select_candidate(1, &arg, candidates);
if (targetOid != NULL)
{
tup = SearchSysCacheTuple(OPRNAME,
PointerGetDatum(op),
ObjectIdGetDatum(InvalidOid),
ObjectIdGetDatum(*targetOid),
CharGetDatum('l'));
}
else
{
tup = NULL;
}
if (!HeapTupleIsValid(tup))
{
elog(ERROR, "Unable to convert left operator '%s' from type %s to %s",
op, typeidTypeName(arg), typeidTypeName(*targetOid));
elog(ERROR, "Unable to convert left operator '%s' from type %s",
op, typeidTypeName(arg));
return NULL;
}
#ifdef PARSEDEBUG