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* Add estimated_count(*) to return an estimate of COUNT(*)
>   http://archives.postgresql.org/pgsql-hackers/2005-11/msg00943.php
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Bruce Momjian
2006-10-24 02:42:34 +00:00
parent 2b1ccefe72
commit 9601745d35
2 changed files with 4 additions and 4 deletions
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@ -2,7 +2,7 @@
PostgreSQL TODO List
====================
Current maintainer: Bruce Momjian (bruce@momjian.us)
Last updated: Mon Oct 23 22:41:16 EDT 2006
Last updated: Mon Oct 23 22:42:19 EDT 2006
The most recent version of this document can be viewed at
http://www.postgresql.org/docs/faqs.TODO.html.
@ -960,12 +960,12 @@ Cache Usage
get a count directly from a unique index, but for this to be
faster than a sequential scan it must avoid access to the heap
to obtain tuple visibility information.
http://archives.postgresql.org/pgsql-hackers/2005-11/msg00943.php
* Add estimated_count(*) to return an estimate of COUNT(*)
This would use the planner ANALYZE statistics to return an estimated
count.
http://archives.postgresql.org/pgsql-hackers/2005-11/msg00943.php
* Allow data to be pulled directly from indexes