diff options
| author | Tom Lane <tgl@sss.pgh.pa.us> | 2006-09-19 22:49:53 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2006-09-19 22:49:53 +0000 |
| commit | b74c5436857cfd71a0f94736f19c9b070b053e24 (patch) | |
| tree | 366bedff3f9e7c5735cd9b7635b2566ffc90f0a6 /src/include/nodes/relation.h | |
| parent | 45e11d098f7b9c611c47e0f8565f4aa88281c914 (diff) | |
Improve usage of effective_cache_size parameter by assuming that all the
tables in the query compete for cache space, not just the one we are
currently costing an indexscan for. This seems more realistic, and it
definitely will help in examples recently exhibited by Stefan
Kaltenbrunner. To get the total size of all the tables involved, we must
tweak the handling of 'append relations' a bit --- formerly we looked up
information about the child tables on-the-fly during set_append_rel_pathlist,
but it needs to be done before we start doing any cost estimation, so
push it into the add_base_rels_to_query scan.
Diffstat (limited to 'src/include/nodes/relation.h')
| -rw-r--r-- | src/include/nodes/relation.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/include/nodes/relation.h b/src/include/nodes/relation.h index d7a93f0f650..471d8e209e2 100644 --- a/src/include/nodes/relation.h +++ b/src/include/nodes/relation.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/nodes/relation.h,v 1.126 2006/07/01 18:38:33 tgl Exp $ + * $PostgreSQL: pgsql/src/include/nodes/relation.h,v 1.127 2006/09/19 22:49:53 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -109,6 +109,8 @@ typedef struct PlannerInfo List *group_pathkeys; /* groupClause pathkeys, if any */ List *sort_pathkeys; /* sortClause pathkeys, if any */ + double total_table_pages; /* # of pages in all tables of query */ + double tuple_fraction; /* tuple_fraction passed to query_planner */ bool hasJoinRTEs; /* true if any RTEs are RTE_JOIN kind */ |