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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2003-01-20 18:55:07 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2003-01-20 18:55:07 +0000 |
| commit | bdfbfde1b168b3332c4cdac34ac86a80aaf4d442 (patch) | |
| tree | f35bf1af04733069f3a6b0a2698ac10dbd6544ed /src/backend/optimizer/path/allpaths.c | |
| parent | be2b660ecd5ca205570825633e7b8479379ddc64 (diff) | |
| download | postgresql-bdfbfde1b168b3332c4cdac34ac86a80aaf4d442.tar.gz | |
IN clauses appearing at top level of WHERE can now be handled as joins.
There are two implementation techniques: the executor understands a new
JOIN_IN jointype, which emits at most one matching row per left-hand row,
or the result of the IN's sub-select can be fed through a DISTINCT filter
and then joined as an ordinary relation.
Along the way, some minor code cleanup in the optimizer; notably, break
out most of the jointree-rearrangement preprocessing in planner.c and
put it in a new file prep/prepjointree.c.
Diffstat (limited to 'src/backend/optimizer/path/allpaths.c')
| -rw-r--r-- | src/backend/optimizer/path/allpaths.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/backend/optimizer/path/allpaths.c b/src/backend/optimizer/path/allpaths.c index c0b3ab40da..f85144b818 100644 --- a/src/backend/optimizer/path/allpaths.c +++ b/src/backend/optimizer/path/allpaths.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/optimizer/path/allpaths.c,v 1.93 2002/11/30 05:21:02 tgl Exp $ + * $Header: /cvsroot/pgsql/src/backend/optimizer/path/allpaths.c,v 1.94 2003/01/20 18:54:49 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -750,6 +750,10 @@ print_path(Query *root, Path *path, int indent) ptype = "Material"; subpath = ((MaterialPath *) path)->subpath; break; + case T_UniquePath: + ptype = "Unique"; + subpath = ((UniquePath *) path)->subpath; + break; case T_NestPath: ptype = "NestLoop"; join = true; |