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Re-implement LIMIT/OFFSET as a plan node type, instead of a hack in

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ExecutorRun.  This allows LIMIT to work in a view.  Also, LIMIT in a
cursor declaration will behave in a reasonable fashion, whereas before
it was overridden by the FETCH count.
This commit is contained in:
Tom Lane
2000-10-26 21:38:24 +00:00
parent c9476bafdb
commit 2f35b4efdb
26 changed files with 572 additions and 232 deletions
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7
src/backend/executor/functions.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/functions.c,v 1.38 2000/08/24 03:29:03 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/functions.c,v 1.39 2000/10/26 21:35:15 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -135,9 +135,6 @@ init_execution_state(char *src, Oid *argOidVect, int nargs)
None);
estate = CreateExecutorState();
if (queryTree->limitOffset != NULL || queryTree->limitCount != NULL)
elog(ERROR, "LIMIT clause from SQL functions not yet implemented");
if (nargs > 0)
{
int i;
@ -328,7 +325,7 @@ postquel_getnext(execution_state *es)
feature = (LAST_POSTQUEL_COMMAND(es)) ? EXEC_RETONE : EXEC_RUN;
return ExecutorRun(es->qd, es->estate, feature, (Node *) NULL, (Node *) NULL);
return ExecutorRun(es->qd, es->estate, feature, 0L);
}
static void