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Added LIMIT/OFFSET functionality including new regression test for it.

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Removed CURRENT keyword for rule queries and changed rules regression
accordingly. CURRENT has beed announced to disappear in v6.5.

Jan
This commit is contained in:
Jan Wieck
1999-02-08 14:14:32 +00:00
parent 54e5d25666
commit be948af2e8
15 changed files with 472 additions and 63 deletions
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39
src/backend/executor/spi.c
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@ -3,7 +3,7 @@
* spi.c--
* Server Programming Interface
*
* $Id: spi.c,v 1.32 1999/01/27 16:15:20 wieck Exp $
* $Id: spi.c,v 1.33 1999/02/08 14:14:10 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@ -779,6 +779,8 @@ _SPI_pquery(QueryDesc *queryDesc, EState *state, int tcount)
bool isRetrieveIntoRelation = false;
char *intoName = NULL;
int res;
Const tcount_const;
Node *count = NULL;
switch (operation)
{
@ -813,6 +815,39 @@ _SPI_pquery(QueryDesc *queryDesc, EState *state, int tcount)
return SPI_ERROR_OPUNKNOWN;
}
/* ----------------
* Get the query LIMIT tuple count
* ----------------
*/
if (parseTree->limitCount != NULL)
{
/* ----------------
* A limit clause in the parsetree overrides the
* tcount parameter
* ----------------
*/
count = parseTree->limitCount;
}
else
{
/* ----------------
* No LIMIT clause in parsetree. Use a local Const node
* to put tcount into it
* ----------------
*/
memset(&tcount_const, 0, sizeof(tcount_const));
tcount_const.type = T_Const;
tcount_const.consttype = INT4OID;
tcount_const.constlen = sizeof(int4);
tcount_const.constvalue = (Datum)tcount;
tcount_const.constisnull = FALSE;
tcount_const.constbyval = TRUE;
tcount_const.constisset = FALSE;
tcount_const.constiscast = FALSE;
count = (Node *)&tcount_const;
}
if (state == NULL) /* plan preparation */
return res;
#ifdef SPI_EXECUTOR_STATS
@ -833,7 +868,7 @@ _SPI_pquery(QueryDesc *queryDesc, EState *state, int tcount)
return SPI_OK_CURSOR;
}
ExecutorRun(queryDesc, state, EXEC_FOR, tcount);
ExecutorRun(queryDesc, state, EXEC_FOR, parseTree->limitOffset, count);
_SPI_current->processed = state->es_processed;
if (operation == CMD_SELECT && queryDesc->dest == SPI)