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Further tweaks to support display of sort keys in EXPLAIN --- initial

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implementation didn't work for Sort nodes associated with Append plans.
This commit is contained in:
Tom Lane
2002-06-13 03:40:49 +00:00
parent 59c325bb73
commit ecb5269404
3 changed files with 39 additions and 34 deletions
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32
src/backend/utils/adt/ruleutils.c
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@ -3,7 +3,7 @@
* back to source text
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v 1.107 2002/05/28 22:16:15 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v 1.108 2002/06/13 03:40:49 tgl Exp $
*
* This software is copyrighted by Jan Wieck - Hamburg.
*
@ -685,16 +685,21 @@ deparse_context_for(const char *aliasname, Oid relid)
* The passed-in Nodes should be made using deparse_context_for_subplan
* and/or deparse_context_for_relation. The resulting context will work
* for deparsing quals, tlists, etc of the plan node.
*
* An rtable list can also be passed in case plain Vars might be seen.
* This is not needed for true upper-level expressions, but is helpful for
* Sort nodes and similar cases with slightly bogus targetlists.
*/
List *
deparse_context_for_plan(int outer_varno, Node *outercontext,
int inner_varno, Node *innercontext)
int inner_varno, Node *innercontext,
List *rtable)
{
deparse_namespace *dpns;
dpns = (deparse_namespace *) palloc(sizeof(deparse_namespace));
dpns->rtable = NIL;
dpns->rtable = rtable;
dpns->outer_varno = outer_varno;
dpns->outer_rte = (RangeTblEntry *) outercontext;
dpns->inner_varno = inner_varno;
@ -779,27 +784,6 @@ deparse_context_for_subplan(const char *name, List *tlist,
return (Node *) rte;
}
/*
* deparse_context_from_rtable - Build deparse context given a rangetable
*
* This is suitable for deparsing expressions that refer to only a single
* level of variables (no outer-reference Vars).
*/
List *
deparse_context_from_rtable(List *rtable)
{
deparse_namespace *dpns;
dpns = (deparse_namespace *) palloc(sizeof(deparse_namespace));
dpns->rtable = rtable;
dpns->outer_varno = dpns->inner_varno = 0;
dpns->outer_rte = dpns->inner_rte = NULL;
/* Return a one-deep namespace stack */
return makeList1(dpns);
}
/* ----------
* make_ruledef - reconstruct the CREATE RULE command
* for a given pg_rewrite tuple