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Executor no longer cares about mergejoinop, mergerightorder, mergeleftorder,

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so remove them from MergeJoin node.  Hack together a partial
solution for commuted mergejoin operators --- yesterday
a mergejoin int4 = int8 would crash if the planner decided to
commute it, today it works.  The planner's representation of
mergejoins really needs a rewrite though.
Also, further testing of mergejoin ops in opr_sanity regress test.
This commit is contained in:
Tom Lane
1999-03-01 00:10:44 +00:00
parent d077c61492
commit b204d10c79
10 changed files with 156 additions and 95 deletions
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20
src/backend/optimizer/path/mergeutils.c
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@@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/Attic/mergeutils.c,v 1.19 1999/02/15 03:22:06 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/Attic/mergeutils.c,v 1.20 1999/03/01 00:10:32 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -27,6 +27,14 @@
* it within a mergeinfo node containing other clause nodes with the same
* mergejoin ordering.
*
* XXX This is completely braindead: there is no reason anymore to segregate
* mergejoin clauses by join operator, since the executor can handle mergejoin
* clause sets with different operators in them. Instead, we ought to be
* building a MergeInfo for each potentially useful ordering of the input
* relations. But right now the optimizer's internal data structures do not
* support that (MergeInfo can only store one MergeOrder for a set of clauses).
* Something to fix next time...
*
* 'restrictinfo_list' is the list of restrictinfo nodes
* 'inner_relid' is the relid of the inner join relation
*
@@ -38,7 +46,7 @@ group_clauses_by_order(List *restrictinfo_list,
int inner_relid)
{
List *mergeinfo_list = NIL;
List *xrestrictinfo = NIL;
List *xrestrictinfo;
foreach(xrestrictinfo, restrictinfo_list)
{
@@ -84,10 +92,10 @@ group_clauses_by_order(List *restrictinfo_list,
mergeinfo_list);
}
((JoinMethod *) xmergeinfo)->clauses = lcons(clause,
((JoinMethod *) xmergeinfo)->clauses);
((JoinMethod *) xmergeinfo)->jmkeys = lcons(jmkeys,
((JoinMethod *) xmergeinfo)->jmkeys);
xmergeinfo->jmethod.clauses = lcons(clause,
xmergeinfo->jmethod.clauses);
xmergeinfo->jmethod.jmkeys = lcons(jmkeys,
xmergeinfo->jmethod.jmkeys);
}
}
return mergeinfo_list;