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Use Params, rather than run-time-modified Const nodes, to handle

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sublink results and COPY's domain constraint checking.  A Const that
isn't really constant is just a Bad Idea(tm).  Remove hacks in
parse_coerce and other places that were needed because of the former
klugery.
This commit is contained in:
Tom Lane
2002-11-26 03:01:59 +00:00
parent ac47950238
commit ea0b5c8569
9 changed files with 166 additions and 190 deletions
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4
src/backend/optimizer/plan/planner.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/planner.c,v 1.130 2002/11/21 00:42:19 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/planner.c,v 1.131 2002/11/26 03:01:58 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -720,8 +720,6 @@ preprocess_expression(Query *parse, Node *expr, int kind)
*
* Note that at this point quals have not yet been converted to
* implicit-AND form, so we can apply eval_const_expressions directly.
* Also note that we need to do this before SS_process_sublinks,
* because that routine inserts bogus "Const" nodes.
*/
expr = eval_const_expressions(expr);