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Fix ExecSubPlan to handle nulls per the SQL spec --- it didn't combine

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nulls with non-nulls using proper three-valued boolean logic.  Also clean
up ExecQual to make it clearer that ExecQual *does* follow the SQL spec
for boolean nulls.  See '[BUGS] (null) != (null)' thread around 10/26/99
for more detail.
This commit is contained in:
Tom Lane
1999-11-12 06:39:34 +00:00
parent 6b99fcf3e2
commit ac61a04a71
3 changed files with 147 additions and 106 deletions
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3
src/include/executor/nodeSubplan.h
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@@ -9,7 +9,8 @@
#include "nodes/plannodes.h"
extern Datum ExecSubPlan(SubPlan *node, List *pvar, ExprContext *econtext);
extern Datum ExecSubPlan(SubPlan *node, List *pvar, ExprContext *econtext,
bool *isNull);
extern bool ExecInitSubPlan(SubPlan *node, EState *estate, Plan *parent);
extern void ExecReScanSetParamPlan(SubPlan *node, Plan *parent);
extern void ExecSetParamPlan(SubPlan *node);