PostgreSQL TODO List
====================
-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.
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
-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
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.
Add estimated_count(*) to return an estimate of COUNT(*)
This would use the planner ANALYZE statistics to return an estimated
count.
Allow data to be pulled directly from indexes
Currently indexes do not have enough tuple visibility information