database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-09-02 04:21:28 +03:00
Code Activity

Replace ALTER TABLE ... SET STATISTICS DISTINCT with a more general mechanism.

Browse Source 
Attributes can now have options, just as relations and tablespaces do, and
the reloptions code is used to parse, validate, and store them.  For
simplicity and because these options are not performance critical, we store
them in a separate cache rather than the main relcache.

Thanks to Alex Hunsaker for the review.
This commit is contained in:
Robert Haas
2010-01-22 16:40:19 +00:00
parent 9ca0989037
commit 76a47c0e74
19 changed files with 267 additions and 223 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
doc/src/sgml/ref/analyze.sgml
View File

@@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/analyze.sgml,v 1.27 2009/08/04 22:04:37 petere Exp $
$PostgreSQL: pgsql/doc/src/sgml/ref/analyze.sgml,v 1.28 2010/01/22 16:40:18 rhaas Exp $
PostgreSQL documentation
-->
@@ -173,7 +173,7 @@ ANALYZE [ VERBOSE ] [ <replaceable class="PARAMETER">table</replaceable> [ ( <re
with the largest possible statistics target. If this inaccuracy leads to
bad query plans, a more accurate value can be determined manually and then
installed with
<command>ALTER TABLE ... ALTER COLUMN ... SET STATISTICS DISTINCT</>
<command>ALTER TABLE ... ALTER COLUMN ... SET (n_distinct = ...)</>
(see <xref linkend="sql-altertable" endterm="sql-altertable-title">).
</para>
</refsect1>