From d468e19a061da518d99c068527a537b90a5f3abd Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Thu, 5 May 2005 00:19:47 +0000
Subject: [PATCH] Allow implicit cast from any named composite type to RECORD.
At the moment this has no particular use except to allow table rows to be
passed to record_out(), but that case seems to be useful in itself per recent
example from Elein. Further down the road we could look at letting PL
functions be declared to accept RECORD parameters.
---
src/backend/parser/parse_coerce.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/src/backend/parser/parse_coerce.c b/src/backend/parser/parse_coerce.c
index 32455785a46..287e496570b 100644
--- a/src/backend/parser/parse_coerce.c
+++ b/src/backend/parser/parse_coerce.c
@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/parser/parse_coerce.c,v 2.127 2005/03/29 00:17:04 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/parser/parse_coerce.c,v 2.128 2005/05/05 00:19:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -318,6 +318,13 @@ coerce_type(ParseState *pstate, Node *node,
return coerce_record_to_complex(pstate, node, targetTypeId,
ccontext, cformat);
}
+ if (targetTypeId == RECORDOID &&
+ ISCOMPLEX(inputTypeId))
+ {
+ /* Coerce a specific complex type to RECORD */
+ /* NB: we do NOT want a RelabelType here */
+ return node;
+ }
if (typeInheritsFrom(inputTypeId, targetTypeId))
{
/*
@@ -405,6 +412,13 @@ can_coerce_type(int nargs, Oid *input_typeids, Oid *target_typeids,
ISCOMPLEX(targetTypeId))
continue;
+ /*
+ * If input is a composite type and target is RECORD, accept
+ */
+ if (targetTypeId == RECORDOID &&
+ ISCOMPLEX(inputTypeId))
+ continue;
+
/*
* If input is a class type that inherits from target, accept
*/
--
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