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0ff7ea5d3c6d126ba9fd05ea1845d49e8c0b4fd9
postgres/doc/src/sgml/ref
History
Tom Lane a2822fb933 Support index-only scans using the visibility map to avoid heap fetches. 
When a btree index contains all columns required by the query, and the
visibility map shows that all tuples on a target heap page are
visible-to-all, we don't need to fetch that heap page.  This patch depends
on the previous patches that made the visibility map reliable.

There's a fair amount left to do here, notably trying to figure out a less
chintzy way of estimating the cost of an index-only scan, but the core
functionality seems ready to commit.

Robert Haas and Ibrar Ahmed, with some previous work by Heikki Linnakangas.
2011-10-07 20:14:13 -04:00
..
abort.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
allfiles.sgml
Uppercase <!ENTITY> and <!DOCTYPE> tags in SGML source
2011-04-04 16:09:10 -04:00
alter_aggregate.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
alter_collation.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
alter_conversion.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
alter_database.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
alter_default_privileges.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
alter_domain.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
alter_extension.sgml
Add "Compatibility" section to ALTER EXTENSION reference page
2011-08-07 22:15:38 +03:00
alter_foreign_data_wrapper.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
alter_foreign_table.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
alter_function.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
alter_group.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
alter_index.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
alter_language.sgml
Remove useless whitespace at end of lines
2010-11-23 22:34:55 +02:00
alter_large_object.sgml
Remove useless whitespace at end of lines
2010-11-23 22:34:55 +02:00
alter_opclass.sgml
Add more ALTER <object> .. SET SCHEMA commands.
2010-11-26 17:31:54 -05:00
alter_operator.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
alter_opfamily.sgml
Spell checking and markup refinement
2011-05-19 01:14:45 +03:00
alter_role.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
alter_schema.sgml
Remove useless whitespace at end of lines
2010-11-23 22:34:55 +02:00
alter_sequence.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
alter_server.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
alter_table.sgml
Remove unnecessary MATCH FULL specification in example.
2011-09-10 09:24:46 -04:00
alter_tablespace.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
alter_trigger.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
alter_tsconfig.sgml
Add more ALTER <object> .. SET SCHEMA commands.
2010-11-26 17:31:54 -05:00
alter_tsdictionary.sgml
Add more ALTER <object> .. SET SCHEMA commands.
2010-11-26 17:31:54 -05:00
alter_tsparser.sgml
Add more ALTER <object> .. SET SCHEMA commands.
2010-11-26 17:31:54 -05:00
alter_tstemplate.sgml
Add more ALTER <object> .. SET SCHEMA commands.
2010-11-26 17:31:54 -05:00
alter_type.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
alter_user_mapping.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
alter_user.sgml
Add REPLICATION privilege for ROLEs
2010-12-29 11:05:03 +01:00
alter_view.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
analyze.sgml
Update and extend the EXPLAIN-related documentation.
2011-09-28 19:39:54 -04:00
begin.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
checkpoint.sgml
Remove cvs keywords from all files.
2010-09-20 22:08:53 +02:00
close.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
cluster.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
clusterdb.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
comment.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
commit_prepared.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
commit.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
copy.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
create_aggregate.sgml
Remove useless whitespace at end of lines
2010-11-23 22:34:55 +02:00
create_cast.sgml
Adjust doc wording about the casting exceptions for composite types.
2011-03-15 20:47:31 -04:00
create_collation.sgml
Make a code-cleanup pass over the collations patch.
2011-04-22 17:43:18 -04:00
create_conversion.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
create_database.sgml
Remove cvs keywords from all files.
2010-09-20 22:08:53 +02:00
create_domain.sgml
Adjust CREATE DOMAIN example for standard_conforming_strings=on.
2011-08-25 09:37:44 -04:00
create_extension.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
create_foreign_data_wrapper.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
create_foreign_table.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
create_function.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
create_group.sgml
Remove useless whitespace at end of lines
2010-11-23 22:34:55 +02:00
create_index.sgml
Fix typo and reword the sentence.
2011-09-08 18:17:57 +03:00
create_language.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
create_opclass.sgml
Spell checking and markup refinement
2011-05-19 01:14:45 +03:00
create_operator.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
create_opfamily.sgml
Remove useless whitespace at end of lines
2010-11-23 22:34:55 +02:00
create_role.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
create_rule.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
create_schema.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
create_sequence.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
create_server.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
create_table_as.sgml
Some markup cleanup to deconfuse the find_gt_lt tool
2011-08-30 20:32:49 +03:00
create_table.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
create_tablespace.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
create_trigger.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
create_tsconfig.sgml
Remove useless whitespace at end of lines
2010-11-23 22:34:55 +02:00
create_tsdictionary.sgml
Remove useless whitespace at end of lines
2010-11-23 22:34:55 +02:00
create_tsparser.sgml
Remove useless whitespace at end of lines
2010-11-23 22:34:55 +02:00
create_tstemplate.sgml
Remove useless whitespace at end of lines
2010-11-23 22:34:55 +02:00
create_type.sgml
Spell checking and markup refinement
2011-05-19 01:14:45 +03:00
create_user_mapping.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
create_user.sgml
Add REPLICATION privilege for ROLEs
2010-12-29 11:05:03 +01:00
create_view.sgml
Document that CREATE VIEW that uses "*" for the column list will not
2011-02-01 17:17:34 -05:00
createdb.sgml
Remove double-quoting of table names in clusterdb. BACKWARD COMPABILITY
2011-09-10 16:39:02 -04:00
createlang.sgml
Remove double-quoting of table names in clusterdb. BACKWARD COMPABILITY
2011-09-10 16:39:02 -04:00
createuser.sgml
Add --{no-,}replication flags to createuser.
2011-09-23 09:25:20 -04:00
deallocate.sgml
Remove cvs keywords from all files.
2010-09-20 22:08:53 +02:00
declare.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
delete.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
discard.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
do.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
drop_aggregate.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
drop_cast.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
drop_collation.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
drop_conversion.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
drop_database.sgml
Remove useless whitespace at end of lines
2010-11-23 22:34:55 +02:00
drop_domain.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
drop_extension.sgml
Allow non-superusers to create (some) extensions.
2011-03-04 16:08:53 -05:00
drop_foreign_data_wrapper.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
drop_foreign_table.sgml
Remove whitespace from end of lines
2011-08-07 16:11:55 +03:00
drop_function.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
drop_group.sgml
Remove cvs keywords from all files.
2010-09-20 22:08:53 +02:00
drop_index.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
drop_language.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
drop_opclass.sgml
Remove useless whitespace at end of lines
2010-11-23 22:34:55 +02:00
drop_operator.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
drop_opfamily.sgml
Remove useless whitespace at end of lines
2010-11-23 22:34:55 +02:00
drop_owned.sgml
Remove cvs keywords from all files.
2010-09-20 22:08:53 +02:00
drop_role.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
drop_rule.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
drop_schema.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
drop_sequence.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
drop_server.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
drop_table.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
drop_tablespace.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
drop_trigger.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
drop_tsconfig.sgml
Remove useless whitespace at end of lines
2010-11-23 22:34:55 +02:00
drop_tsdictionary.sgml
Remove useless whitespace at end of lines
2010-11-23 22:34:55 +02:00
drop_tsparser.sgml
Remove useless whitespace at end of lines
2010-11-23 22:34:55 +02:00
drop_tstemplate.sgml
Remove useless whitespace at end of lines
2010-11-23 22:34:55 +02:00
drop_type.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
drop_user_mapping.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
drop_user.sgml
Remove cvs keywords from all files.
2010-09-20 22:08:53 +02:00
drop_view.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
dropdb.sgml
Add --if-exists option to dropdb and dropuser.
2011-08-30 12:14:39 -04:00
droplang.sgml
Remove double-quoting of table names in clusterdb. BACKWARD COMPABILITY
2011-09-10 16:39:02 -04:00
dropuser.sgml
Repair brain fade in previous commit, per Josh Kupershmidt.
2011-08-30 12:49:18 -04:00
ecpg-ref.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
end.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
execute.sgml
Remove cvs keywords from all files.
2010-09-20 22:08:53 +02:00
explain.sgml
Update and extend the EXPLAIN-related documentation.
2011-09-28 19:39:54 -04:00
fetch.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
grant.sgml
Remove whitespace from end of lines
2011-08-07 16:11:55 +03:00
initdb.sgml
Remove '=' from initdb switch syntax.
2011-03-09 09:48:05 -05:00
insert.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
listen.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
load.sgml
Remove cvs keywords from all files.
2010-09-20 22:08:53 +02:00
lock.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
move.sgml
Duplicate expansion of "direction" from FETCH's synopsis into MOVE
2011-04-04 12:04:43 -04:00
notify.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
pg_basebackup.sgml
Adjust wording now that estimated size can increase
2011-08-17 11:01:06 +02:00
pg_config-ref.sgml
Remove useless whitespace at end of lines
2010-11-23 22:34:55 +02:00
pg_controldata.sgml
Improve wording of initdb and pg_controldata manual pages.
2011-03-09 09:19:24 -05:00
pg_ctl-ref.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
pg_dump.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
pg_dumpall.sgml
Put options in some sensible order
2011-05-25 21:53:26 +03:00
pg_resetxlog.sgml
Remove useless whitespace at end of lines
2010-11-23 22:34:55 +02:00
pg_restore.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
postgres-ref.sgml
Support index-only scans using the visibility map to avoid heap fetches.
2011-10-07 20:14:13 -04:00
postmaster.sgml
Remove cvs keywords from all files.
2010-09-20 22:08:53 +02:00
prepare_transaction.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
prepare.sgml
Redesign the plancache mechanism for more flexibility and efficiency.
2011-09-16 00:43:52 -04:00
psql-ref.sgml
Spelling improvement
2011-08-27 08:08:26 +03:00
reassign_owned.sgml
Remove cvs keywords from all files.
2010-09-20 22:08:53 +02:00
reindex.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
reindexdb.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
release_savepoint.sgml
Remove useless whitespace at end of lines
2010-11-23 22:34:55 +02:00
reset.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
revoke.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
rollback_prepared.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
rollback_to.sgml
Some markup cleanup to deconfuse the find_gt_lt tool
2011-08-30 20:32:49 +03:00
rollback.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
savepoint.sgml
Remove useless whitespace at end of lines
2010-11-23 22:34:55 +02:00
security_label.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
select_into.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
select.sgml
Improve generated column names for cases involving sub-SELECTs.
2011-10-01 14:01:46 -04:00
set_constraints.sgml
Remove cvs keywords from all files.
2010-09-20 22:08:53 +02:00
set_role.sgml
Remove cvs keywords from all files.
2010-09-20 22:08:53 +02:00
set_session_auth.sgml
Remove cvs keywords from all files.
2010-09-20 22:08:53 +02:00
set_transaction.sgml
Unify spelling of "canceled", "canceling", "cancellation"
2011-06-29 09:28:46 +03:00
set.sgml
Simplify handling of the timezone GUC by making initdb choose the default.
2011-09-09 17:59:11 -04:00
show.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
start_transaction.sgml
Implement genuine serializable isolation level.
2011-02-08 00:09:08 +02:00
truncate.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
unlisten.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
update.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
vacuum.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
vacuumdb.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00
values.sgml
Fix a whitespace issue with the man pages
2011-08-07 10:55:32 +03:00