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Repair planner failure when there are multiple IN clauses, each with

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a join in its subselect.  In this situation we *must* build a bushy
plan because there are no valid left-sided or right-sided join trees.
Accordingly, hoary sanity check needs an update.  Per report from
Alessandro Depase.
This commit is contained in:
Tom Lane
2003-12-17 17:07:48 +00:00
parent 9dddd242dd
commit 99e922a01d
2 changed files with 22 additions and 3 deletions
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4
src/backend/optimizer/path/allpaths.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/path/allpaths.c,v 1.109 2003/11/29 19:51:50 pgsql Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/path/allpaths.c,v 1.110 2003/12/17 17:07:48 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -545,6 +545,8 @@ make_one_rel_by_joins(Query *root, int levels_needed, List *initial_rels)
/*
* We should have a single rel at the final level.
*/
if (joinitems[levels_needed] == NIL)
elog(ERROR, "failed to build any %d-way joins", levels_needed);
Assert(length(joinitems[levels_needed]) == 1);
rel = (RelOptInfo *) lfirst(joinitems[levels_needed]);