From 2f35b4efdbec6c161ca9bd491d6345134910c425 Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Thu, 26 Oct 2000 21:38:24 +0000 Subject: Re-implement LIMIT/OFFSET as a plan node type, instead of a hack in ExecutorRun. This allows LIMIT to work in a view. Also, LIMIT in a cursor declaration will behave in a reasonable fashion, whereas before it was overridden by the FETCH count. --- src/backend/nodes/copyfuncs.c | 30 +++++++++++++++++++++++++++++- 1 file changed, 29 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 3d740533ff..e78de345d9 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 - * $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.126 2000/10/18 16:16:04 momjian Exp $ + * $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.127 2000/10/26 21:35:47 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -592,6 +592,31 @@ _copySetOp(SetOp *from) return newnode; } +/* ---------------- + * _copyLimit + * ---------------- + */ +static Limit * +_copyLimit(Limit *from) +{ + Limit *newnode = makeNode(Limit); + + /* ---------------- + * copy node superclass fields + * ---------------- + */ + CopyPlanFields((Plan *) from, (Plan *) newnode); + + /* ---------------- + * copy remainder of node + * ---------------- + */ + Node_Copy(from, newnode, limitOffset); + Node_Copy(from, newnode, limitCount); + + return newnode; +} + /* ---------------- * _copyHash * ---------------- @@ -2567,6 +2592,9 @@ copyObject(void *from) case T_SetOp: retval = _copySetOp(from); break; + case T_Limit: + retval = _copyLimit(from); + break; case T_Hash: retval = _copyHash(from); break; -- cgit v1.2.1