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SQL-language functions are now callable in ordinary fmgr contexts ...

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for example, an SQL function can be used in a functional index.  (I make
no promises about speed, but it'll work ;-).)  Clean up and simplify
handling of functions returning sets.
This commit is contained in:
Tom Lane
2000-08-24 03:29:15 +00:00
parent 87523ab8db
commit 782c16c6a1
35 changed files with 889 additions and 921 deletions
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35
src/backend/executor/nodeNestloop.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/nodeNestloop.c,v 1.19 2000/08/13 02:50:03 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/nodeNestloop.c,v 1.20 2000/08/24 03:29:03 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -87,13 +87,6 @@ ExecNestLoop(NestLoop *node)
outerTupleSlot = nlstate->jstate.cs_OuterTupleSlot;
econtext->ecxt_outertuple = outerTupleSlot;
/* ----------------
* Reset per-tuple memory context to free any expression evaluation
* storage allocated in the previous tuple cycle.
* ----------------
*/
ResetExprContext(econtext);
/* ----------------
* Check to see if we're still projecting out tuples from a previous
* join tuple (because there is a function-returning-set in the
@ -103,15 +96,23 @@ ExecNestLoop(NestLoop *node)
if (nlstate->jstate.cs_TupFromTlist)
{
TupleTableSlot *result;
bool isDone;
ExprDoneCond isDone;
result = ExecProject(nlstate->jstate.cs_ProjInfo, &isDone);
if (!isDone)
if (isDone == ExprMultipleResult)
return result;
/* Done with that source tuple... */
nlstate->jstate.cs_TupFromTlist = false;
}
/* ----------------
* Reset per-tuple memory context to free any expression evaluation
* storage allocated in the previous tuple cycle. Note this can't
* happen until we're done projecting out tuples from a join tuple.
* ----------------
*/
ResetExprContext(econtext);
/* ----------------
* Ok, everything is setup for the join so now loop until
* we return a qualifying join tuple..
@ -219,16 +220,18 @@ ExecNestLoop(NestLoop *node)
* using ExecProject().
* ----------------
*/
ProjectionInfo *projInfo;
TupleTableSlot *result;
bool isDone;
ExprDoneCond isDone;
ENL1_printf("qualification succeeded, projecting tuple");
projInfo = nlstate->jstate.cs_ProjInfo;
result = ExecProject(projInfo, &isDone);
nlstate->jstate.cs_TupFromTlist = !isDone;
return result;
result = ExecProject(nlstate->jstate.cs_ProjInfo, &isDone);
if (isDone != ExprEndResult)
{
nlstate->jstate.cs_TupFromTlist = (isDone == ExprMultipleResult);
return result;
}
}
/* ----------------