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Change LIMIT/OFFSET to use int8

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Dhanaraj M
This commit is contained in:
Bruce Momjian
2006-07-26 00:34:48 +00:00
parent 796de9c1ed
commit 085e559654
8 changed files with 89 additions and 27 deletions
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33
src/backend/executor/nodeLimit.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/executor/nodeLimit.c,v 1.25 2006/03/05 15:58:26 momjian Exp $
* $PostgreSQL: pgsql/src/backend/executor/nodeLimit.c,v 1.26 2006/07/26 00:34:48 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -23,6 +23,7 @@
#include "executor/executor.h"
#include "executor/nodeLimit.h"
#include "catalog/pg_type.h"
static void recompute_limits(LimitState *node);
@ -226,14 +227,24 @@ recompute_limits(LimitState *node)
{
ExprContext *econtext = node->ps.ps_ExprContext;
bool isNull;
Oid type;
if (node->limitOffset)
{
node->offset =
DatumGetInt32(ExecEvalExprSwitchContext(node->limitOffset,
type = ((Const *) node->limitOffset->expr)->consttype;
if (type == INT8OID)
node->offset =
DatumGetInt64(ExecEvalExprSwitchContext(node->limitOffset,
econtext,
&isNull,
NULL));
else
node->offset = DatumGetInt32(ExecEvalExprSwitchContext(node->limitOffset,
econtext,
&isNull,
NULL));
/* Interpret NULL offset as no offset */
if (isNull)
node->offset = 0;
@ -249,11 +260,21 @@ recompute_limits(LimitState *node)
if (node->limitCount)
{
node->noCount = false;
node->count =
DatumGetInt32(ExecEvalExprSwitchContext(node->limitCount,
type = ((Const *) node->limitCount->expr)->consttype;
if (type == INT8OID)
node->count =
DatumGetInt64(ExecEvalExprSwitchContext(node->limitCount,
econtext,
&isNull,
NULL));
else
node->count = DatumGetInt32(ExecEvalExprSwitchContext(node->limitCount,
econtext,
&isNull,
NULL));
/* Interpret NULL count as no count (LIMIT ALL) */
if (isNull)
node->noCount = true;