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Repair oversight in 8.2 change that improved the handling of "pseudoconstant"

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WHERE clauses.  createplan.c is now willing to stick a gating Result node
almost anywhere in the plan tree, and in particular one can wind up directly
underneath a MergeJoin node.  This means it had better be willing to handle
Mark/Restore.  Fortunately, that's trivial in such cases, since we can just
pass off the call to the input node (which the planner has previously ensured
can handle Mark/Restore).  Per report from Phil Frost.
This commit is contained in:
Tom Lane
2007-02-15 03:07:13 +00:00
parent d19da98a7f
commit bfe553fb49
3 changed files with 55 additions and 5 deletions
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36
src/backend/executor/nodeResult.c
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@ -38,7 +38,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/executor/nodeResult.c,v 1.37 2007/02/02 00:07:03 tgl Exp $
* $PostgreSQL: pgsql/src/backend/executor/nodeResult.c,v 1.38 2007/02/15 03:07:13 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -166,6 +166,36 @@ ExecResult(ResultState *node)
return NULL;
}
/* ----------------------------------------------------------------
* ExecResultMarkPos
* ----------------------------------------------------------------
*/
void
ExecResultMarkPos(ResultState *node)
{
PlanState *outerPlan = outerPlanState(node);
if (outerPlan != NULL)
ExecMarkPos(outerPlan);
else
elog(DEBUG2, "Result nodes do not support mark/restore");
}
/* ----------------------------------------------------------------
* ExecResultRestrPos
* ----------------------------------------------------------------
*/
void
ExecResultRestrPos(ResultState *node)
{
PlanState *outerPlan = outerPlanState(node);
if (outerPlan != NULL)
ExecRestrPos(outerPlan);
else
elog(ERROR, "Result nodes do not support mark/restore");
}
/* ----------------------------------------------------------------
* ExecInitResult
*
@ -180,8 +210,8 @@ ExecInitResult(Result *node, EState *estate, int eflags)
ResultState *resstate;
/* check for unsupported flags */
Assert(!(eflags & EXEC_FLAG_MARK));
Assert(!(eflags & EXEC_FLAG_BACKWARD) || outerPlan(node) != NULL);
Assert(!(eflags & (EXEC_FLAG_MARK | EXEC_FLAG_BACKWARD)) ||
outerPlan(node) != NULL);
/*
* create state structure