From 7e64dbc6b5e516a2510ae41c8c7999d1d8d25872 Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Wed, 9 Jun 2004 19:08:20 +0000
Subject: Support assignment to subfields of composite columns in UPDATE and
 INSERT. As a side effect, cause subscripts in INSERT targetlists to do
 something more or less sensible; previously we evaluated such subscripts and
 then effectively ignored them.  Another side effect is that UPDATE-ing an
 element or slice of an array value that is NULL now produces a non-null
 result, namely an array containing just the assigned-to positions.

---
 src/backend/nodes/readfuncs.c | 47 +++++++++++++++++--------------------------
 1 file changed, 19 insertions(+), 28 deletions(-)

(limited to 'src/backend/nodes/readfuncs.c')

diff --git a/src/backend/nodes/readfuncs.c b/src/backend/nodes/readfuncs.c
index 225bf6241f..e3fa983cea 100644
--- a/src/backend/nodes/readfuncs.c
+++ b/src/backend/nodes/readfuncs.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/nodes/readfuncs.c,v 1.171 2004/05/30 23:40:27 neilc Exp $
+ *	  $PostgreSQL: pgsql/src/backend/nodes/readfuncs.c,v 1.172 2004/06/09 19:08:15 tgl Exp $
  *
  * NOTES
  *	  Path and Plan nodes do not have any readfuncs support, because we
@@ -543,6 +543,22 @@ _readFieldSelect(void)
 	READ_DONE();
 }
 
+/*
+ * _readFieldStore
+ */
+static FieldStore *
+_readFieldStore(void)
+{
+	READ_LOCALS(FieldStore);
+
+	READ_NODE_FIELD(arg);
+	READ_NODE_FIELD(newvals);
+	READ_NODE_FIELD(fieldnums);
+	READ_OID_FIELD(resulttype);
+
+	READ_DONE();
+}
+
 /*
  * _readRelabelType
  */
@@ -814,17 +830,6 @@ _readFromExpr(void)
  *	Stuff from parsenodes.h.
  */
 
-static ColumnRef *
-_readColumnRef(void)
-{
-	READ_LOCALS(ColumnRef);
-
-	READ_NODE_FIELD(fields);
-	READ_NODE_FIELD(indirection);
-
-	READ_DONE();
-}
-
 static ColumnDef *
 _readColumnDef(void)
 {
@@ -859,18 +864,6 @@ _readTypeName(void)
 	READ_DONE();
 }
 
-static ExprFieldSelect *
-_readExprFieldSelect(void)
-{
-	READ_LOCALS(ExprFieldSelect);
-
-	READ_NODE_FIELD(arg);
-	READ_NODE_FIELD(fields);
-	READ_NODE_FIELD(indirection);
-
-	READ_DONE();
-}
-
 /*
  * _readRangeTblEntry
  */
@@ -974,6 +967,8 @@ parseNodeString(void)
 		return_value = _readSubLink();
 	else if (MATCH("FIELDSELECT", 11))
 		return_value = _readFieldSelect();
+	else if (MATCH("FIELDSTORE", 10))
+		return_value = _readFieldStore();
 	else if (MATCH("RELABELTYPE", 11))
 		return_value = _readRelabelType();
 	else if (MATCH("CASE", 4))
@@ -1008,14 +1003,10 @@ parseNodeString(void)
 		return_value = _readJoinExpr();
 	else if (MATCH("FROMEXPR", 8))
 		return_value = _readFromExpr();
-	else if (MATCH("COLUMNREF", 9))
-		return_value = _readColumnRef();
 	else if (MATCH("COLUMNDEF", 9))
 		return_value = _readColumnDef();
 	else if (MATCH("TYPENAME", 8))
 		return_value = _readTypeName();
-	else if (MATCH("EXPRFIELDSELECT", 15))
-		return_value = _readExprFieldSelect();
 	else if (MATCH("RTE", 3))
 		return_value = _readRangeTblEntry();
 	else if (MATCH("NOTIFY", 6))
-- 
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