diff options
| author | Tom Lane <tgl@sss.pgh.pa.us> | 2007-09-20 17:56:33 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2007-09-20 17:56:33 +0000 |
| commit | 282d2a03dd30804b01f8042f640d638c2ee76604 (patch) | |
| tree | 004f08ce31f1bfb03ab55571ad7867babe5b3d7f /src/include/utils/rel.h | |
| parent | bbf4fdc2538097bb3103806e1419ceef1f289203 (diff) | |
HOT updates. When we update a tuple without changing any of its indexed
columns, and the new version can be stored on the same heap page, we no longer
generate extra index entries for the new version. Instead, index searches
follow the HOT-chain links to ensure they find the correct tuple version.
In addition, this patch introduces the ability to "prune" dead tuples on a
per-page basis, without having to do a complete VACUUM pass to recover space.
VACUUM is still needed to clean up dead index entries, however.
Pavan Deolasee, with help from a bunch of other people.
Diffstat (limited to 'src/include/utils/rel.h')
| -rw-r--r-- | src/include/utils/rel.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/include/utils/rel.h b/src/include/utils/rel.h index bc6bf190b86..48569c583b2 100644 --- a/src/include/utils/rel.h +++ b/src/include/utils/rel.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/utils/rel.h,v 1.101 2007/05/27 03:50:39 tgl Exp $ + * $PostgreSQL: pgsql/src/include/utils/rel.h,v 1.102 2007/09/20 17:56:32 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -19,6 +19,7 @@ #include "catalog/pg_class.h" #include "catalog/pg_index.h" #include "fmgr.h" +#include "nodes/bitmapset.h" #include "rewrite/prs2lock.h" #include "storage/block.h" #include "storage/relfilenode.h" @@ -145,6 +146,7 @@ typedef struct RelationData TupleDesc rd_att; /* tuple descriptor */ Oid rd_id; /* relation's object id */ List *rd_indexlist; /* list of OIDs of indexes on relation */ + Bitmapset *rd_indexattr; /* identifies columns used in indexes */ Oid rd_oidindex; /* OID of unique index on OID, if any */ LockInfoData rd_lockInfo; /* lock mgr's info for locking relation */ RuleLock *rd_rules; /* rewrite rules */ |