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| author | Bruce Momjian <bruce@momjian.us> | 2005-09-20 20:51:30 +0000 |
|---|---|---|
| committer | Bruce Momjian <bruce@momjian.us> | 2005-09-20 20:51:30 +0000 |
| commit | 8d86982a11438a496c022b1632ffe32b691ca388 (patch) | |
| tree | c42bf8980c5394acf7e9472e7696a67b9a38c260 | |
| parent | b7159824e610ad5ab71c2e8fb1cbad3946e2d2b2 (diff) | |
| download | postgresql-8d86982a11438a496c022b1632ffe32b691ca388.tar.gz postgresql-8d86982a11438a496c022b1632ffe32b691ca388.zip | |
Merge items:
< This would be beneficial when there are few distinct values.
> This would be beneficial when there are few distinct values. This is
> already used by GROUP BY.
946d946
< * Allow DISTINCT to use hashing like GROUP BY
| -rw-r--r-- | doc/TODO | 6 | ||||
| -rw-r--r-- | doc/src/FAQ/TODO.html | 6 |
2 files changed, 6 insertions, 6 deletions
@@ -2,7 +2,7 @@ PostgreSQL TODO List ==================== Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us) -Last updated: Mon Sep 19 22:21:26 EDT 2005 +Last updated: Tue Sep 20 16:51:26 EDT 2005 The most recent version of this document can be viewed at http://www.postgresql.org/docs/faqs.TODO.html. @@ -939,11 +939,11 @@ Optimizer / Executor * Have EXPLAIN ANALYZE highlight poor optimizer estimates * Consider using hash buckets to do DISTINCT, rather than sorting - This would be beneficial when there are few distinct values. + This would be beneficial when there are few distinct values. This is + already used by GROUP BY. * Log queries where the optimizer row estimates were dramatically different from the number of rows actually found? -* Allow DISTINCT to use hashing like GROUP BY Miscellaneous Performance diff --git a/doc/src/FAQ/TODO.html b/doc/src/FAQ/TODO.html index a1ffb6bb94e..a34a1c8910b 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: Mon Sep 19 22:21:26 EDT 2005 +Last updated: Tue Sep 20 16:51:26 EDT 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>. @@ -851,11 +851,11 @@ first. </li><li>Improve ability to display optimizer analysis using OPTIMIZER_DEBUG </li><li>Have EXPLAIN ANALYZE highlight poor optimizer estimates </li><li>Consider using hash buckets to do DISTINCT, rather than sorting -<p> This would be beneficial when there are few distinct values. +<p> This would be beneficial when there are few distinct values. This is + already used by GROUP BY. </p> </li><li>Log queries where the optimizer row estimates were dramatically different from the number of rows actually found? - </li><li>Allow DISTINCT to use hashing like GROUP BY </li></ul> <h1><a name="section_21">Miscellaneous Performance</a></h1> |