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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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doc/TODO

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PostgreSQL TODO List
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====================
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Current maintainer: Bruce Momjian (bruce@momjian.us)
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Last updated: Mon Oct 23 22:41:16 EDT 2006
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Last updated: Mon Oct 23 22:42:19 EDT 2006
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The most recent version of this document can be viewed at
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http://www.postgresql.org/docs/faqs.TODO.html.
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get a count directly from a unique index, but for this to be
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faster than a sequential scan it must avoid access to the heap
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to obtain tuple visibility information.
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http://archives.postgresql.org/pgsql-hackers/2005-11/msg00943.php
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* Add estimated_count(*) to return an estimate of COUNT(*)
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This would use the planner ANALYZE statistics to return an estimated
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count.
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http://archives.postgresql.org/pgsql-hackers/2005-11/msg00943.php
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* Allow data to be pulled directly from indexes
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doc/src/FAQ/TODO.html

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<body bgcolor="#FFFFFF" text="#000000" link="#FF0000" vlink="#A00000" alink="#0000FF">
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<h1><a name="section_1">PostgreSQL TODO List</a></h1>
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<p>Current maintainer: Bruce Momjian (<a href="mailto:bruce@momjian.us">bruce@momjian.us</a>)<br/>
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Last updated: Mon Oct 23 22:41:16 EDT 2006
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</p>
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<p>The most recent version of this document can be viewed at<br/>
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<a href="http://www.postgresql.org/docs/faqs.TODO.html">http://www.postgresql.org/docs/faqs.TODO.html</a>.
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get a count directly from a unique index, but for this to be
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faster than a sequential scan it must avoid access to the heap
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to obtain tuple visibility information.
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<a href="http://archives.postgresql.org/pgsql-hackers/2005-11/msg00943.php">http://archives.postgresql.org/pgsql-hackers/2005-11/msg00943.php</a>
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</p>
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</li><li>Add estimated_count(*) to return an estimate of COUNT(*)
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<p> This would use the planner ANALYZE statistics to return an estimated
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count.
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<a href="http://archives.postgresql.org/pgsql-hackers/2005-11/msg00943.php">http://archives.postgresql.org/pgsql-hackers/2005-11/msg00943.php</a>
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</p>
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</li><li>Allow data to be pulled directly from indexes
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<p> Currently indexes do not have enough tuple visibility information

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