Support expressions of the form 'scalar op ANY (array)' and

'scalar op ALL (array)', where the operator is applied between the
lefthand scalar and each element of the array.  The operator must
yield boolean; the result of the construct is the OR or AND of the
per-element results, respectively.

Original coding by Joe Conway, after an idea of Peter's.  Rewritten
by Tom to keep the implementation strictly separate from subqueries.

1 files changed, 29 insertions, 1 deletions

diff --git a/src/backend/nodes/readfuncs.c b/src/backend/nodes/readfuncs.c
index 1d2db3b37a9..b26a7a1ae8c 100644
--- a/src/backend/nodes/readfuncs.c
+++ b/src/backend/nodes/readfuncs.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/nodes/readfuncs.c,v 1.156 2003/06/25 21:30:30 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/nodes/readfuncs.c,v 1.157 2003/06/29 00:33:43 tgl Exp $
  *
  * NOTES
  *	  Path and Plan nodes do not have any readfuncs support, because we
@@ -511,6 +511,32 @@ _readDistinctExpr(void)
 }
 
 /*
+ * _readScalarArrayOpExpr
+ */
+static ScalarArrayOpExpr *
+_readScalarArrayOpExpr(void)
+{
+	READ_LOCALS(ScalarArrayOpExpr);
+
+	READ_OID_FIELD(opno);
+	READ_OID_FIELD(opfuncid);
+	/*
+	 * The opfuncid is stored in the textual format primarily for debugging
+	 * and documentation reasons.  We want to always read it as zero to force
+	 * it to be re-looked-up in the pg_operator entry.  This ensures that
+	 * stored rules don't have hidden dependencies on operators' functions.
+	 * (We don't currently support an ALTER OPERATOR command, but might
+	 * someday.)
+	 */
+	local_node->opfuncid = InvalidOid;
+
+	READ_BOOL_FIELD(useOr);
+	READ_NODE_FIELD(args);
+
+	READ_DONE();
+}
+
+/*
  * _readBoolExpr
  */
 static BoolExpr *
@@ -951,6 +977,8 @@ parseNodeString(void)
 		return_value = _readOpExpr();
 	else if (MATCH("DISTINCTEXPR", 12))
 		return_value = _readDistinctExpr();
+	else if (MATCH("SCALARARRAYOPEXPR", 17))
+		return_value = _readScalarArrayOpExpr();
 	else if (MATCH("BOOLEXPR", 8))
 		return_value = _readBoolExpr();
 	else if (MATCH("SUBLINK", 7))