-
+z
PostgreSQL TODO List
====================
Current maintainer: Bruce Momjian (bruce@momjian.us)
-Last updated: Sat May 5 10:47:39 EDT 2007
+Last updated: Sat May 5 11:39:57 EDT 2007
The most recent version of this document can be viewed at
http://www.postgresql.org/docs/faqs.TODO.html.
Dependency Checking
===================
-* Flush cached query plans when the dependent objects change,
- when the cardinality of parameters changes dramatically, or
+* -Flush cached query plans when the dependent objects change or
when new ANALYZE statistics are available
-
- A more complex solution would be to save multiple plans for different
- cardinality and use the appropriate plan based on the EXECUTE values.
-
-* Track dependencies in function bodies and recompile/invalidate
-
- This is particularly important for references to temporary tables
- in PL/PgSQL because PL/PgSQL caches query plans. The only workaround
- in PL/PgSQL is to use EXECUTE. One complexity is that a function
- might itself drop and recreate dependent tables, causing it to
- invalidate its own query plan.
-
-* Invalidate prepared queries, like INSERT, when the table definition
+* -Track dependencies in function bodies and recompile/invalidate
+* -Invalidate prepared queries, like INSERT, when the table definition
is altered
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-<title>PostgreSQL TODO List</title>
+<title>z</title>
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-<h1><a name="section_1">PostgreSQL TODO List</a></h1>
-<p>Current maintainer: Bruce Momjian (<a href="mailto:bruce@momjian.us">bruce@momjian.us</a>)<br/>
-Last updated: Sat May 5 10:47:39 EDT 2007
-</p>
+<p>z<br/>
+PostgreSQL TODO List
+</p><hr/>
+Current maintainer: Bruce Momjian (<a href="mailto:bruce@momjian.us">bruce@momjian.us</a>)<br/>
+Last updated: Sat May 5 11:39:57 EDT 2007
+
<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>.
</p>
first. There is also a developer's wiki at<br/>
<a href="http://developer.postgresql.org">http://developer.postgresql.org</a>.
</p>
-<h1><a name="section_2">Administration</a></h1>
+<h1><a name="section_1">Administration</a></h1>
<ul>
<li>Allow major upgrades without dump/reload, perhaps using pg_upgrade
</p>
</li></ul>
</li></ul>
-<h1><a name="section_3">Monitoring</a></h1>
+<h1><a name="section_2">Monitoring</a></h1>
<ul>
<li>Allow server log information to be output as INSERT statements
</p>
</li><li>-<em>Add ability to monitor the use of temporary sort files</em>
</li></ul>
-<h1><a name="section_4">Data Types</a></h1>
+<h1><a name="section_3">Data Types</a></h1>
<ul>
<li>-<em>Make 64-bit version of the MONEY data type</em>
</li></ul>
</li></ul>
</li></ul>
-<h1><a name="section_5">Functions</a></h1>
+<h1><a name="section_4">Functions</a></h1>
<ul>
<li>Allow INET subnet tests using non-constants to be indexed
e.g. box @> point
</p>
</li></ul>
-<h1><a name="section_6">Multi-Language Support</a></h1>
+<h1><a name="section_5">Multi-Language Support</a></h1>
<ul>
<li>Add NCHAR (as distinguished from ordinary varchar),
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2007-03/msg00767.php">http://archives.postgresql.org/pgsql-hackers/2007-03/msg00767.php</a>
</p>
</li></ul>
-<h1><a name="section_7">Views / Rules</a></h1>
+<h1><a name="section_6">Views / Rules</a></h1>
<ul>
<li>Automatically create rules on views so they are updateable, per SQL99
are added after the view is created.
</p>
</li></ul>
-<h1><a name="section_8">SQL Commands</a></h1>
+<h1><a name="section_7">SQL Commands</a></h1>
<ul>
<li>Add CORRESPONDING BY to UNION/INTERSECT/EXCEPT
</li></ul>
</li></ul>
</li></ul>
-<h1><a name="section_9">Clients</a></h1>
+<h1><a name="section_8">Clients</a></h1>
<ul>
<li>Have pg_ctl look at PGHOST in case it is a socket directory?
</p>
</li></ul>
</p></ul>
-<h1><a name="section_10">Triggers</a></h1>
+<h1><a name="section_9">Triggers</a></h1>
<ul>
<li>Add deferred trigger queue file
<p> <a href="http://archives.postgresql.org/pgsql-general/2007-02/msg01466.php">http://archives.postgresql.org/pgsql-general/2007-02/msg01466.php</a>
</p>
</li></ul>
-<h1><a name="section_11">Dependency Checking</a></h1>
+<h1><a name="section_10">Dependency Checking</a></h1>
<ul>
- <li>Flush cached query plans when the dependent objects change,
- when the cardinality of parameters changes dramatically, or
+ <li>-<em>Flush cached query plans when the dependent objects change or</em>
when new ANALYZE statistics are available
-<p> A more complex solution would be to save multiple plans for different
- cardinality and use the appropriate plan based on the EXECUTE values.
-</p>
- </li><li>Track dependencies in function bodies and recompile/invalidate
-<p> This is particularly important for references to temporary tables
- in PL/PgSQL because PL/PgSQL caches query plans. The only workaround
- in PL/PgSQL is to use EXECUTE. One complexity is that a function
- might itself drop and recreate dependent tables, causing it to
- invalidate its own query plan.
-</p>
- </li><li>Invalidate prepared queries, like INSERT, when the table definition
+ </li><li>-<em>Track dependencies in function bodies and recompile/invalidate</em>
+ </li><li>-<em>Invalidate prepared queries, like INSERT, when the table definition</em>
is altered
</li></ul>
-<h1><a name="section_12">Indexes</a></h1>
+<h1><a name="section_11">Indexes</a></h1>
<ul>
<li>Add UNIQUE capability to non-btree indexes
</p>
</li></ul>
</li></ul>
-<h1><a name="section_13">Fsync</a></h1>
+<h1><a name="section_12">Fsync</a></h1>
<ul>
<li>Improve commit_delay handling to reduce fsync()
<a href="http://archives.postgresql.org/pgsql-hackers/2007-01/msg00079.php">http://archives.postgresql.org/pgsql-hackers/2007-01/msg00079.php</a>
</p>
</li></ul>
-<h1><a name="section_14">Cache Usage</a></h1>
+<h1><a name="section_13">Cache Usage</a></h1>
<ul>
<li>Allow free-behind capability for large sequential scans, perhaps using
<a href="http://archives.postgresql.org/pgsql-hackers/2007-01/msg00752.php">http://archives.postgresql.org/pgsql-hackers/2007-01/msg00752.php</a>
</p>
</li></ul>
-<h1><a name="section_15">Vacuum</a></h1>
+<h1><a name="section_14">Vacuum</a></h1>
<ul>
<li>Improve speed with indexes
</p>
</li></ul>
</li></ul>
-<h1><a name="section_16">Locking</a></h1>
+<h1><a name="section_15">Locking</a></h1>
<ul>
<li>Fix priority ordering of read and write light-weight locks (Neil)
</li><li>Add idle_in_transaction_timeout GUC so locks are not held for long
periods of time
</li></ul>
-<h1><a name="section_17">Startup Time Improvements</a></h1>
+<h1><a name="section_16">Startup Time Improvements</a></h1>
<ul>
<li>Experiment with multi-threaded backend for backend creation [<a href="http://momjian.postgresql.org/cgi-bin/pgtodo?thread">thread</a>]
existing backends is one of the difficulties with a backend approach.
</p>
</li></ul>
-<h1><a name="section_18">Write-Ahead Log</a></h1>
+<h1><a name="section_17">Write-Ahead Log</a></h1>
<ul>
<li>Eliminate need to write full pages to WAL before page modification [<a href="http://momjian.postgresql.org/cgi-bin/pgtodo?wal">wal</a>]
of indexes on TOAST tables.
</p>
</li></ul>
-<h1><a name="section_19">Optimizer / Executor</a></h1>
+<h1><a name="section_18">Optimizer / Executor</a></h1>
<ul>
<li>Improve selectivity functions for geometric operators
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2007-01/msg00096.php">http://archives.postgresql.org/pgsql-hackers/2007-01/msg00096.php</a>
</p>
</li></ul>
-<h1><a name="section_20">Miscellaneous Performance</a></h1>
+<h1><a name="section_19">Miscellaneous Performance</a></h1>
<ul>
<li>Do async I/O for faster random read-ahead of data
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2007-01/msg00752.php">http://archives.postgresql.org/pgsql-hackers/2007-01/msg00752.php</a>
</p>
</li></ul>
-<h1><a name="section_21">Source Code</a></h1>
+<h1><a name="section_20">Source Code</a></h1>
<ul>
<li>Add use of 'const' for variables in source tree
of result sets using new statement protocol
</li></ul>
</li></ul>
-<h1><a name="section_22">Exotic Features</a></h1>
+<h1><a name="section_21">Exotic Features</a></h1>
<ul>
<li>Add pre-parsing phase that converts non-ISO syntax to supported
<a href="http://archives.postgresql.org/pgsql-hackers/2006-10/msg01527.php">http://archives.postgresql.org/pgsql-hackers/2006-10/msg01527.php</a>
</p>
</li></ul>
-<h1><a name="section_23">Features We Do <u>Not</u> Want</a></h1>
+<h1><a name="section_22">Features We Do <u>Not</u> Want</a></h1>
<ul>
<li>All backends running as threads in a single process (not wanted)
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