Promote row expressions to full-fledged citizens of the expression syntax,

rather than allowing them only in a few special cases as before.  In
particular you can now pass a ROW() construct to a function that accepts
a rowtype parameter.  Internal generation of RowExprs fixes a number of
corner cases that used to not work very well, such as referencing the
whole-row result of a JOIN or subquery.  This represents a further step in
the work I started a month or so back to make rowtype values into
first-class citizens.

1 files changed, 14 insertions, 1 deletions

diff --git a/src/backend/nodes/outfuncs.c b/src/backend/nodes/outfuncs.c
index 9139a9bec54..e919a851940 100644
--- a/src/backend/nodes/outfuncs.c
+++ b/src/backend/nodes/outfuncs.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.235 2004/05/08 21:21:18 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.236 2004/05/10 22:44:44 tgl Exp $
  *
  * NOTES
  *	  Every node type that can appear in stored rules' parsetrees *must*
@@ -829,6 +829,16 @@ _outArrayExpr(StringInfo str, ArrayExpr *node)
 }
 
 static void
+_outRowExpr(StringInfo str, RowExpr *node)
+{
+	WRITE_NODE_TYPE("ROW");
+
+	WRITE_NODE_FIELD(args);
+	WRITE_OID_FIELD(row_typeid);
+	WRITE_ENUM_FIELD(row_format, CoercionForm);
+}
+
+static void
 _outCoalesceExpr(StringInfo str, CoalesceExpr *node)
 {
 	WRITE_NODE_TYPE("COALESCE");
@@ -1719,6 +1729,9 @@ _outNode(StringInfo str, void *obj)
 			case T_ArrayExpr:
 				_outArrayExpr(str, obj);
 				break;
+			case T_RowExpr:
+				_outRowExpr(str, obj);
+				break;
 			case T_CoalesceExpr:
 				_outCoalesceExpr(str, obj);
 				break;