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| author | Bruce Momjian <bruce@momjian.us> | 2005-11-22 23:06:56 +0000 |
|---|---|---|
| committer | Bruce Momjian <bruce@momjian.us> | 2005-11-22 23:06:56 +0000 |
| commit | c28c00ecc8c382d4a1d261abbe4d8aacd54407ef (patch) | |
| tree | e484d86fe3fa6507748fee3ca6822081c951cb56 | |
| parent | e96925fba7d50c3ee141968722819e8fce5a5215 (diff) | |
| download | postgresql-c28c00ecc8c382d4a1d261abbe4d8aacd54407ef.tar.gz postgresql-c28c00ecc8c382d4a1d261abbe4d8aacd54407ef.zip | |
Add:
>
> * Add estimated_count(*) to return an estimate of COUNT(*)
>
> This would use the planner ANALYZE statistatics to return an estimated
> count.
| -rw-r--r-- | doc/TODO | 7 | ||||
| -rw-r--r-- | doc/src/FAQ/TODO.html | 6 |
2 files changed, 11 insertions, 2 deletions
@@ -2,7 +2,7 @@ PostgreSQL TODO List ==================== Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us) -Last updated: Wed Nov 16 13:44:51 EST 2005 +Last updated: Tue Nov 22 17:53:39 EST 2005 The most recent version of this document can be viewed at http://www.postgresql.org/docs/faqs.TODO.html. @@ -841,6 +841,11 @@ Cache Usage 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 statistatics to return an estimated + count. + * Allow data to be pulled directly from indexes Currently indexes do not have enough tuple visibility information diff --git a/doc/src/FAQ/TODO.html b/doc/src/FAQ/TODO.html index a3d1050c162..e25b0686515 100644 --- a/doc/src/FAQ/TODO.html +++ b/doc/src/FAQ/TODO.html @@ -8,7 +8,7 @@ <body bgcolor="#FFFFFF" text="#000000" link="#FF0000" vlink="#A00000" alink="#0000FF"> <h1><a name="section_1">PostgreSQL TODO List</a></h1> <p>Current maintainer: Bruce Momjian (<a href="mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</a>)<br/> -Last updated: Wed Nov 16 13:44:51 EST 2005 +Last updated: Tue Nov 22 17:53:39 EST 2005 </p> <p>The most recent version of this document can be viewed at<br/> <a href="http://www.postgresql.org/docs/faqs.TODO.html">http://www.postgresql.org/docs/faqs.TODO.html</a>. @@ -763,6 +763,10 @@ first. faster than a sequential scan it must avoid access to the heap to obtain tuple visibility information. </p> + </li><li>Add estimated_count(*) to return an estimate of COUNT(*) +<p> This would use the planner ANALYZE statistatics to return an estimated + count. +</p> </li><li>Allow data to be pulled directly from indexes <p> Currently indexes do not have enough tuple visibility information to allow data to be pulled from the index without also accessing |