From 2f63232d30ca64a8f2684af855230f23a701d371 Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Mon, 10 May 2004 22:44:49 +0000 Subject: 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. --- src/backend/nodes/copyfuncs.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) (limited to 'src/backend/nodes/copyfuncs.c') diff --git a/src/backend/nodes/copyfuncs.c b/src/backend/nodes/copyfuncs.c index 1466be98cbb..91fb3b08343 100644 --- a/src/backend/nodes/copyfuncs.c +++ b/src/backend/nodes/copyfuncs.c @@ -15,7 +15,7 @@ * Portions Copyright (c) 1994, Regents of the University of California * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.280 2004/05/05 04:48:45 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.281 2004/05/10 22:44:44 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -998,6 +998,21 @@ _copyArrayExpr(ArrayExpr *from) return newnode; } +/* + * _copyRowExpr + */ +static RowExpr * +_copyRowExpr(RowExpr *from) +{ + RowExpr *newnode = makeNode(RowExpr); + + COPY_NODE_FIELD(args); + COPY_SCALAR_FIELD(row_typeid); + COPY_SCALAR_FIELD(row_format); + + return newnode; +} + /* * _copyCoalesceExpr */ @@ -2674,6 +2689,9 @@ copyObject(void *from) case T_ArrayExpr: retval = _copyArrayExpr(from); break; + case T_RowExpr: + retval = _copyRowExpr(from); + break; case T_CoalesceExpr: retval = _copyCoalesceExpr(from); break; -- cgit v1.2.3