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Commit 62c0618

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Remove completed items, and the last is unwanted:
< o Fix memory leak from exceptions < < http://archives.postgresql.org/pgsql-performance/2006-06/msg00305.php < < * Allow constraint_exclusion to work for UNIONs like it does for < inheritance, allow it to work for UPDATE and DELETE statements, and allow < it to be used for all statements with little performance impact < < * 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
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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: Wed Jan 10 23:48:50 EST 2007
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Last updated: Sat Jan 13 10:13:24 EST 2007
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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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http://archives.postgresql.org/pgsql-patches/2005-11/msg00045.php
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o Fix memory leak from exceptions
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http://archives.postgresql.org/pgsql-performance/2006-06/msg00305.php
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o Fix problems with RETURN NEXT on tables with
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dropped/added columns after function creation
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one column or expression indexes, perhaps using per-index statistics
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* -Allow the creation of indexes with mixed ascending/descending
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specifiers
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* Allow constraint_exclusion to work for UNIONs like it does for
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inheritance, allow it to work for UPDATE and DELETE statements, and allow
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it to be used for all statements with little performance impact
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* Consider compressing indexes by storing key values duplicated in
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several rows as a single index entry
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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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* 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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Currently indexes do not have enough tuple visibility information

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: Wed Jan 10 23:48:50 EST 2007
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Last updated: Sat Jan 13 10:13:24 EST 2007
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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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</p>
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</li><li>Allow PL/RETURN to return row or record functions
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<p> <a href="http://archives.postgresql.org/pgsql-patches/2005-11/msg00045.php">http://archives.postgresql.org/pgsql-patches/2005-11/msg00045.php</a>
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</p>
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</li><li>Fix memory leak from exceptions
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<p> <a href="http://archives.postgresql.org/pgsql-performance/2006-06/msg00305.php">http://archives.postgresql.org/pgsql-performance/2006-06/msg00305.php</a>
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</p>
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</li><li>Fix problems with RETURN NEXT on tables with
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one column or expression indexes, perhaps using per-index statistics
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</li><li>-<em>Allow the creation of indexes with mixed ascending/descending</em>
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specifiers
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</li><li>Allow constraint_exclusion to work for UNIONs like it does for
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inheritance, allow it to work for UPDATE and DELETE statements, and allow
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it to be used for all statements with little performance impact
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</li><li>Consider compressing indexes by storing key values duplicated in
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several rows as a single index entry
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<p> This is difficult because it requires datatype-specific knowledge.
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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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</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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