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Commit85b587c

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Fix thinko in my recent change to put an explicit argisrow field in NullTest:
when the planner splits apart a ROW(...) IS NULL test, the argisrow valuesof the component tests have to be determined from the component field types,not copied from the original NullTest (in which argisrow is surely true).
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‎src/backend/optimizer/util/clauses.c‎

Lines changed: 8 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/optimizer/util/clauses.c,v 1.283 2010/01/02 16:57:48 momjian Exp $
11+
* $PostgreSQL: pgsql/src/backend/optimizer/util/clauses.c,v 1.284 2010/01/19 16:33:33 tgl Exp $
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*
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* HISTORY
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* AUTHORDATEMAJOR EVENT
@@ -2826,15 +2826,17 @@ eval_const_expressions_mutator(Node *node,
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context);
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if (arg&&IsA(arg,RowExpr))
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{
2829-
RowExpr*rarg= (RowExpr*)arg;
2830-
List*newargs=NIL;
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ListCell*l;
2832-
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/*
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* We break ROW(...) IS [NOT] NULL into separate tests on its
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* component fields. This form is usually more efficient to
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* evaluate, as well as being more amenable to optimization.
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*/
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RowExpr*rarg= (RowExpr*)arg;
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List*newargs=NIL;
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ListCell*l;
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Assert(ntest->argisrow);
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foreach(l,rarg->args)
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{
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Node*relem= (Node*)lfirst(l);
@@ -2856,7 +2858,7 @@ eval_const_expressions_mutator(Node *node,
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newntest=makeNode(NullTest);
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newntest->arg= (Expr*)relem;
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newntest->nulltesttype=ntest->nulltesttype;
2859-
newntest->argisrow=ntest->argisrow;
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newntest->argisrow=type_is_rowtype(exprType(relem));
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newargs=lappend(newargs,newntest);
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}
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/* If all the inputs were constants, result is TRUE */

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