rdelaage
/
postgresql
mirror of https://git.postgresql.org/git/postgresql.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Add: 

> * Consider using hash buckets to do DISTINCT, rather than sorting
>
>   This would be beneficial when there are few distinct values.
This commit is contained in:
Bruce Momjian 2004-09-02 01:18:46 +00:00
parent bf831f6e9f
commit c58eb2dd7b
1 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
doc/TODO
View File

@ -5,7 +5,7 @@ TODO list for PostgreSQL
Bracketed items "[]" have more detail. Bracketed items "[]" have more detail.
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us) Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
Last updated: Mon Aug 30 12:08:12 EDT 2004 Last updated: Wed Sep 1 21:18:44 EDT 2004
The most recent version of this document can be viewed at the PostgreSQL web site, http://www.PostgreSQL.org. The most recent version of this document can be viewed at the PostgreSQL web site, http://www.PostgreSQL.org.
@ -802,6 +802,9 @@ Optimizer / Executor
CHECK constraints contain information about the distribution of values CHECK constraints contain information about the distribution of values
within the table. This is also useful for implementing subtables where within the table. This is also useful for implementing subtables where
a tables content is distributed across several subtables. a tables content is distributed across several subtables.
* Consider using hash buckets to do DISTINCT, rather than sorting
This would be beneficial when there are few distinct values.
Miscellaneous Miscellaneous