git.postgresql.org Git - postgresql.git/commitdiff

2005年4月10日 20:57:32 +0000 (20:57 +0000)

2005年4月10日 20:57:32 +0000 (20:57 +0000)

that is a plain NULL and not a COALESCE with no inputs. Fixes crash
reported by Michael Williamson.

index 24d74523c3713532d015f9d0f9e78a69f7d475c7..926162d469cb6f6d2461c1c11fa1a3c6fcc03057 100644 (file)

* IDENTIFICATION

- * $PostgreSQL: pgsql/src/backend/optimizer/util/clauses.c,v 1.193 2005年04月06日 16:34:06 tgl Exp $

+ * $PostgreSQL: pgsql/src/backend/optimizer/util/clauses.c,v 1.194 2005年04月10日 20:57:32 tgl Exp $

* HISTORY

* AUTHOR DATE MAJOR EVENT

@@ -1788,6 +1788,10 @@ eval_const_expressions_mutator(Node *node,

newargs = lappend(newargs, e);

}

+ /* If all the arguments were constant null, the result is just null */

+ if (newargs == NIL)

+ return (Node *) makeNullConst(coalesceexpr->coalescetype);

newcoalesce = makeNode(CoalesceExpr);

newcoalesce->coalescetype = coalesceexpr->coalescetype;

newcoalesce->args = newargs;

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