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Recent changes in sublink representation require exprType() to accept 

SubPlan nodes, else explaining queries containing sublinks may fail.
This commit is contained in:
Tom Lane 2003-01-13 00:18:51 +00:00
parent d4ce5a4f4c
commit d1686b42ab
1 changed files with 29 additions and 1 deletions
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30
src/backend/parser/parse_expr.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parse_expr.c,v 1.140 2003/01/10 21:08:15 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parse_expr.c,v 1.141 2003/01/13 00:18:51 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -20,6 +20,7 @@
#include "miscadmin.h"
#include "nodes/makefuncs.h"
#include "nodes/params.h"
#include "nodes/plannodes.h"
#include "parser/analyze.h"
#include "parser/gramparse.h"
#include "parser/parse.h"
@ -962,6 +963,7 @@ exprType(Node *expr)
elog(ERROR, "exprType: Cannot get type for untransformed sublink");
tent = (TargetEntry *) lfirst(qtree->targetList);
Assert(IsA(tent, TargetEntry));
Assert(!tent->resdom->resjunk);
type = tent->resdom->restype;
}
else
@ -971,6 +973,32 @@ exprType(Node *expr)
}
}
break;
case T_SubPlan:
{
/*
* Although the parser does not ever deal with already-planned
* expression trees, we support SubPlan nodes in this routine
* for the convenience of ruleutils.c.
*/
SubPlan *subplan = (SubPlan *) expr;
if (subplan->subLinkType == EXPR_SUBLINK)
{
/* get the type of the subselect's first target column */
TargetEntry *tent;
tent = (TargetEntry *) lfirst(subplan->plan->targetlist);
Assert(IsA(tent, TargetEntry));
Assert(!tent->resdom->resjunk);
type = tent->resdom->restype;
}
else
{
/* for all other subplan types, result is boolean */
type = BOOLOID;
}
}
break;
case T_FieldSelect:
type = ((FieldSelect *) expr)->resulttype;
break;