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PostgreSQL TODO List
====================
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
-Last updated: Sun Apr 24 21:42:27 EDT 2005
+Last updated: Mon Apr 25 09:03:30 EDT 2005
The most recent version of this document can be viewed at
http://www.postgresql.org/docs/faqs.TODO.html.
====================
* Add missing optimizer selectivities for date, r-tree, etc
+* Allow ORDER BY ... LIMIT 1 to select high/low value without sort or
+ index using a sequential scan for highest/lowest values
+
+ Right now, if no index exists, ORDER BY ... LIMIT 1 requires we sort
+ all values to return the high/low value. Instead The idea is to do a
+ sequential scan to find the high/low value, thus avoiding the sort.
+
* Precompile SQL functions to avoid overhead
* Create utility to compute accurate random_page_cost value
* Improve ability to display optimizer analysis using OPTIMIZER_DEBUG
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<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: Sun Apr 24 21:42:27 EDT 2005
+Last updated: Mon Apr 25 09:03:30 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>.
<ul>
<li>Add missing optimizer selectivities for date, r-tree, etc
+ </li><li>Allow ORDER BY ... LIMIT 1 to select high/low value without sort or
+ index using a sequential scan for highest/lowest values
+<p> Right now, if no index exists, ORDER BY ... LIMIT 1 requires we sort
+ all values to return the high/low value. Instead The idea is to do a
+ sequential scan to find the high/low value, thus avoiding the sort.
+</p>
</li><li>Precompile SQL functions to avoid overhead
</li><li>Create utility to compute accurate random_page_cost value
</li><li>Improve ability to display optimizer analysis using OPTIMIZER_DEBUG