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Fix some issues that prevent this file to be processed by scripts.

Browse Source 
While at it, mark a couple of items completed in 8.4:
!   o -Prevent long-lived temporary tables from causing frozen-xid
      advancement starvation

! * -Improve performance of shared invalidation queue for multiple CPUs

Also remove a couple of obsolete assignments.
This commit is contained in:
Alvaro Herrera 2008-08-19 03:08:56 +00:00
parent 48a9d92159
commit a3faf37f49
2 changed files with 144 additions and 154 deletions
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106
doc/TODO
View File

@ -331,40 +331,40 @@ Data Types
http://archives.postgresql.org/pgsql-hackers/2006-11/msg00390.php
o Add ISO INTERVAL handling
* Add ISO INTERVAL handling
http://archives.postgresql.org/pgsql-hackers/2006-01/msg00250.php
http://archives.postgresql.org/pgsql-bugs/2006-04/msg00248.php
http://archives.postgresql.org/pgsql-hackers/2006-01/msg00250.php
http://archives.postgresql.org/pgsql-bugs/2006-04/msg00248.php
o Support ISO INTERVAL syntax if units cannot be determined from
the string, and are supplied after the string
o Support ISO INTERVAL syntax if units cannot be determined from
the string, and are supplied after the string
The SQL standard states that the units after the string
specify the units of the string, e.g. INTERVAL '2' MINUTE
should return '00:02:00'. The current behavior has the units
restrict the interval value to the specified unit or unit
range, INTERVAL '70' SECOND returns '00:00:10'.
The SQL standard states that the units after the string
specify the units of the string, e.g. INTERVAL '2' MINUTE
should return '00:02:00'. The current behavior has the units
restrict the interval value to the specified unit or unit
range, INTERVAL '70' SECOND returns '00:00:10'.
For syntax that isn't uniquely ISO or PG syntax, like '1' or
'1:30', treat as ISO if there is a range specification clause,
and as PG if there no clause is present, e.g. interpret '1:30'
MINUTE TO SECOND as '1 minute 30 seconds', and interpret
'1:30' as '1 hour, 30 minutes'.
For syntax that isn't uniquely ISO or PG syntax, like '1' or
'1:30', treat as ISO if there is a range specification clause,
and as PG if there no clause is present, e.g. interpret '1:30'
MINUTE TO SECOND as '1 minute 30 seconds', and interpret
'1:30' as '1 hour, 30 minutes'.
This makes common cases like SELECT INTERVAL '1' MONTH
SQL-standard results. The SQL standard supports a limited
number of unit combinations and doesn't support unit names in
the string. The PostgreSQL syntax is more flexible in the
range of units supported, e.g. PostgreSQL supports '1 year 1
hour', while the SQL standard does not.
This makes common cases like SELECT INTERVAL '1' MONTH
SQL-standard results. The SQL standard supports a limited
number of unit combinations and doesn't support unit names in
the string. The PostgreSQL syntax is more flexible in the
range of units supported, e.g. PostgreSQL supports '1 year 1
hour', while the SQL standard does not.
o Add support for year-month syntax, INTERVAL '50-6' YEAR
TO MONTH
o Interpret INTERVAL '1 year' MONTH as CAST (INTERVAL '1
year' AS INTERVAL MONTH), and this should return '12 months'
o Round or truncate values to the requested precision, e.g.
INTERVAL '11 months' AS YEAR should return one or zero
o Support precision, CREATE TABLE foo (a INTERVAL MONTH(3))
o Add support for year-month syntax, INTERVAL '50-6' YEAR
TO MONTH
o Interpret INTERVAL '1 year' MONTH as CAST (INTERVAL '1
year' AS INTERVAL MONTH), and this should return '12 months'
o Round or truncate values to the requested precision, e.g.
INTERVAL '11 months' AS YEAR should return one or zero
o Support precision, CREATE TABLE foo (a INTERVAL MONTH(3))
* Arrays
@ -384,7 +384,7 @@ Data Types
o Add security checking for large objects
o Auto-delete large objects when referencing row is deleted
contrib/lo offers this functionality.
contrib/lo offers this functionality.
o Allow read/write into TOAST values like large objects
@ -396,14 +396,14 @@ Data Types
* MONEY data type
* Add locale-aware MONEY type, and support multiple currencies
o Add locale-aware MONEY type, and support multiple currencies
http://archives.postgresql.org/pgsql-general/2005-08/msg01432.php
http://archives.postgresql.org/pgsql-hackers/2007-03/msg01181.php
* MONEY dumps in a locale-specific format making it difficult to
o MONEY dumps in a locale-specific format making it difficult to
restore to a system with a different locale
* Allow MONEY to be easily cast to/from other numeric data types
o Allow MONEY to be easily cast to/from other numeric data types
* Text Search
@ -494,7 +494,7 @@ Functions
* Prevent malicious functions from being executed with the permissions
of unsuspecting users
Index functions are safe, so VACUUM and ANALYZE are safe too.
Index functions are safe, so VACUUM and ANALYZE are safe too.
Triggers, CHECK and DEFAULT expressions, and rules are still vulnerable.
http://archives.postgresql.org/pgsql-hackers/2008-01/msg00268.php
@ -569,7 +569,7 @@ Multi-Language Support
http://archives.postgresql.org/pgsql-hackers/2006-01/msg00767.php
http://archives.postgresql.org/pgsql-patches/2006-03/msg00233.php
http://archives.postgresql.org/pgsql-hackers/2006-09/msg00662.php
http://wiki.postgresql.org/wiki/Todo:Collate
http://wiki.postgresql.org/wiki/Todo:Collate
http://wiki.postgresql.org/wiki/Todo:ICU
* Support multiple simultaneous character sets, per SQL92
@ -667,7 +667,7 @@ SQL Commands
* Improve failure message when DROP DATABASE is used on a database that
has prepared transactions
* Allow prepared transactions with temporary tables created and dropped
in the same transaction, and when an ON COMMIT DELETE ROWS temporary
in the same transaction, and when an ON COMMIT DELETE ROWS temporary
table is accessed
http://archives.postgresql.org/pgsql-hackers/2008-03/msg00047.php
@ -840,7 +840,7 @@ SQL Commands
like CHECK that are inherited by child tables unless CASCADE
is used
o -Prevent child tables from altering or dropping constraints
like CHECK that were inherited from the parent table
like CHECK that were inherited from the parent table
o Have ALTER INDEX update the name of a constraint using that index
o Add ALTER TABLE RENAME CONSTRAINT, update index name also
o Allow column display reordering by recording a display,
@ -860,7 +860,7 @@ SQL Commands
This might require some background daemon to maintain clustering
during periods of low usage. It might also require tables to be only
partially filled for easier reorganization. Another idea would
be to create a merged heap/index data file so an index lookup would
be to create a merged heap/index data file so an index lookup would
automatically access the heap data too. A third idea would be to
store heap rows in hashed groups, perhaps using a user-supplied
hash function.
@ -915,7 +915,7 @@ SQL Commands
o Allow COPY to report errors sooner
http://archives.postgresql.org/pgsql-hackers/2008-04/msg01169.php
http://archives.postgresql.org/pgsql-hackers/2008-04/msg01169.php
@ -958,7 +958,7 @@ SQL Commands
o Allow LISTEN/NOTIFY to store info in memory rather than tables?
Currently LISTEN/NOTIFY information is stored in pg_listener.
Currently LISTEN/NOTIFY information is stored in pg_listener.
Storing such information in memory would improve performance.
o Add optional textual message to NOTIFY
@ -1154,7 +1154,7 @@ Clients
o -Improve display of enums to show valid enum values
o Add prompt escape to display the client and server versions
o Add option to wrap column values at whitespace boundaries,
rather than chopping them at a fixed width.
rather than chopping them at a fixed width.
Currently, "wrapped" format chops values into fixed
widths. Perhaps the word wrapping could use the same
@ -1195,7 +1195,7 @@ Clients
http://archives.postgresql.org/pgsql-hackers/2008-02/msg00205.php
o Allow pg_restore to utilize multiple CPUs and I/O channels by
restoring multiple objects simultaneously
restoring multiple objects simultaneously
This might require a pg_restore flag to indicate how many
simultaneous operations should be performed. Only pg_dump's
@ -1208,7 +1208,7 @@ Clients
concurrently, via a single heap scan
This requires a pg_dump -Fc file because that format contains
the required dependency information.
the required dependency information.
http://archives.postgresql.org/pgsql-general/2007-05/msg01274.php
o Allow pg_restore to load different parts of the COPY data
@ -1435,7 +1435,7 @@ Indexes
* Hash
http://archives.postgresql.org/pgsql-hackers/2007-09/msg00051.php
o http://archives.postgresql.org/pgsql-hackers/2007-09/msg00051.php
o Pack hash index buckets onto disk pages more efficiently
@ -1526,7 +1526,7 @@ Cache Usage
page of bitmaps could track 512MB of heap pages.
A third idea would be for a heap scan to check if all rows are visible
and if so set a per-table flag which can be checked by index scans.
and if so set a per-table flag which can be checked by index scans.
Any change to the table would have to clear the flag. To detect
changes during the heap scan a counter could be set at the start and
checked at the end --- if it is the same, the table has not been
@ -1536,11 +1536,9 @@ Cache Usage
http://archives.postgresql.org/pgsql-patches/2008-01/msg00049.php
* Consider automatic caching of statements at various levels:
parsed query tree, query execution plan, query results
o Parsed query tree
o Query execute plan
o Query results
http://archives.postgresql.org/pgsql-hackers/2008-04/msg00823.php
http://archives.postgresql.org/pgsql-hackers/2008-04/msg00823.php
* Consider increasing internal areas when shared buffers is increased
@ -1617,7 +1615,7 @@ Vacuum
http://archives.postgresql.org/pgsql-hackers/2006-12/msg00876.php
o Prevent long-lived temporary tables from causing frozen-xid
o -Prevent long-lived temporary tables from causing frozen-xid
advancement starvation
The problem is that autovacuum cannot vacuum them to set frozen xids;
@ -1639,7 +1637,7 @@ Vacuum
Locking
=======
* Fix priority ordering of read and write light-weight locks (Neil)
* Fix priority ordering of read and write light-weight locks
http://archives.postgresql.org/pgsql-hackers/2004-11/msg00893.php
http://archives.postgresql.org/pgsql-hackers/2004-11/msg00905.php
@ -1822,7 +1820,7 @@ Background Writer
catalogs and the transaction status log.
* Consider adding buffers the background writer finds reusable to the
free list
free list
http://archives.postgresql.org/pgsql-hackers/2007-04/msg00781.php
@ -1925,7 +1923,7 @@ Miscellaneous Performance
http://archives.postgresql.org/pgsql-committers/2007-11/msg00585.php
* Improve performance of shared invalidation queue for multiple CPUs
* -Improve performance of shared invalidation queue for multiple CPUs
http://archives.postgresql.org/pgsql-performance/2008-01/msg00023.php
@ -1975,7 +1973,7 @@ Source Code
* %Remove warnings created by -Wcast-align
* Move platform-specific ps status display info from ps_status.c to ports
* Add optional CRC checksum to heap and index pages
* Improve documentation to build only interfaces (Marc)
* Improve documentation to build only interfaces
* Remove or relicense modules that are not under the BSD license, if possible
* Acquire lock on a relation before building a relcache entry for it
* Allow cross-compiling by generating the zic database on the target system
@ -2132,7 +2130,7 @@ Exotic Features
modification.
* Allow plug-in modules to emulate features from other databases
* Add features of Oracle-style packages (Pavel)
* Add features of Oracle-style packages
A package would be a schema with session-local variables,
public/private functions, and initialization functions. It

192
doc/src/FAQ/TODO.html
View File

@ -1,9 +1,9 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>PostgreSQL TODO List</title>
<meta name="generator" content="HTML::TextToHTML v2.25"/>
<meta name="generator" content="HTML::TextToHTML v2.51"/>
</head>
<body bgcolor="#FFFFFF" text="#000000" link="#FF0000" vlink="#A00000" alink="#0000FF">
<h1><a name="section_1">PostgreSQL TODO List</a></h1>
@ -286,94 +286,92 @@ first. There is also a developer's wiki at<br/>
LC_MESSAGES
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2006-11/msg00390.php">http://archives.postgresql.org/pgsql-hackers/2006-11/msg00390.php</a>
</p>
</li><li>Add ISO INTERVAL handling
</li></ul>
</li></ul>
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2006-01/msg00250.php">http://archives.postgresql.org/pgsql-hackers/2006-01/msg00250.php</a><br/>
<a href="http://archives.postgresql.org/pgsql-bugs/2006-04/msg00248.php">http://archives.postgresql.org/pgsql-bugs/2006-04/msg00248.php</a>
</li><li>Add ISO INTERVAL handling
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2006-01/msg00250.php">http://archives.postgresql.org/pgsql-hackers/2006-01/msg00250.php</a>
<a href="http://archives.postgresql.org/pgsql-bugs/2006-04/msg00248.php">http://archives.postgresql.org/pgsql-bugs/2006-04/msg00248.php</a>
</p>
<ul>
<li>Support ISO INTERVAL syntax if units cannot be determined from
the string, and are supplied after the string
<p> The SQL standard states that the units after the string
specify the units of the string, e.g. INTERVAL '2' MINUTE
should return '00:02:00'. The current behavior has the units
restrict the interval value to the specified unit or unit
range, INTERVAL '70' SECOND returns '00:00:10'.
</p>
<p> For syntax that isn't uniquely ISO or PG syntax, like '1' or
'1:30', treat as ISO if there is a range specification clause,
and as PG if there no clause is present, e.g. interpret '1:30'
MINUTE TO SECOND as '1 minute 30 seconds', and interpret
'1:30' as '1 hour, 30 minutes'.
</p>
<p> This makes common cases like SELECT INTERVAL '1' MONTH
SQL-standard results. The SQL standard supports a limited
number of unit combinations and doesn't support unit names in
the string. The PostgreSQL syntax is more flexible in the
range of units supported, e.g. PostgreSQL supports '1 year 1
hour', while the SQL standard does not.
</p>
</li><li>Add support for year-month syntax, INTERVAL '50-6' YEAR
TO MONTH
</li><li>Interpret INTERVAL '1 year' MONTH as CAST (INTERVAL '1
year' AS INTERVAL MONTH), and this should return '12 months'
</li><li>Round or truncate values to the requested precision, e.g.
INTERVAL '11 months' AS YEAR should return one or zero
</li><li>Support precision, CREATE TABLE foo (a INTERVAL MONTH(3))
<ul>
<li>Arrays
<ul>
<li>Delay resolution of array expression's data type so assignment
<li>Support ISO INTERVAL syntax if units cannot be determined from
the string, and are supplied after the string
<p> The SQL standard states that the units after the string
specify the units of the string, e.g. INTERVAL '2' MINUTE
should return '00:02:00'. The current behavior has the units
restrict the interval value to the specified unit or unit
range, INTERVAL '70' SECOND returns '00:00:10'.
</p>
<p> For syntax that isn't uniquely ISO or PG syntax, like '1' or
'1:30', treat as ISO if there is a range specification clause,
and as PG if there no clause is present, e.g. interpret '1:30'
MINUTE TO SECOND as '1 minute 30 seconds', and interpret
'1:30' as '1 hour, 30 minutes'.
</p>
<p> This makes common cases like SELECT INTERVAL '1' MONTH
SQL-standard results. The SQL standard supports a limited
number of unit combinations and doesn't support unit names in
the string. The PostgreSQL syntax is more flexible in the
range of units supported, e.g. PostgreSQL supports '1 year 1
hour', while the SQL standard does not.
</p>
</li><li>Add support for year-month syntax, INTERVAL '50-6' YEAR
TO MONTH
</li><li>Interpret INTERVAL '1 year' MONTH as CAST (INTERVAL '1
year' AS INTERVAL MONTH), and this should return '12 months'
</li><li>Round or truncate values to the requested precision, e.g.
INTERVAL '11 months' AS YEAR should return one or zero
</li><li>Support precision, CREATE TABLE foo (a INTERVAL MONTH(3))
</li></ul>
</li><li>Arrays
<ul>
<li>Delay resolution of array expression's data type so assignment
coercion can be performed on empty array expressions
</li><li>Add support for arrays of domains
</li><li>Add support for arrays of domains
<p> <a href="http://archives.postgresql.org/pgsql-patches/2007-05/msg00114.php">http://archives.postgresql.org/pgsql-patches/2007-05/msg00114.php</a>
</p>
</li><li>Allow single-byte header storage for array elements
</li></ul>
</li><li>Binary Data
<ul>
<li>Improve vacuum of large objects, like contrib/vacuumlo?
</li><li>Add security checking for large objects
</li><li>Auto-delete large objects when referencing row is deleted
</li><li>Allow single-byte header storage for array elements
</li></ul>
</li><li>Binary Data
<ul>
<li>Improve vacuum of large objects, like contrib/vacuumlo?
</li><li>Add security checking for large objects
</li><li>Auto-delete large objects when referencing row is deleted
<p> contrib/lo offers this functionality.
</p>
</li><li>Allow read/write into TOAST values like large objects
</li><li>Allow read/write into TOAST values like large objects
<p> This requires the TOAST column to be stored EXTERNAL.
</p>
</li><li>Add API for 64-bit large object access
</li><li>Add API for 64-bit large object access
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2005-09/msg00781.php">http://archives.postgresql.org/pgsql-hackers/2005-09/msg00781.php</a>
</p>
</li></ul>
</li><li>MONEY data type
<ul>
<li>Add locale-aware MONEY type, and support multiple currencies
</li></ul>
</li><li>MONEY data type
<ul>
<li>Add locale-aware MONEY type, and support multiple currencies
<p> <a href="http://archives.postgresql.org/pgsql-general/2005-08/msg01432.php">http://archives.postgresql.org/pgsql-general/2005-08/msg01432.php</a>
<a href="http://archives.postgresql.org/pgsql-hackers/2007-03/msg01181.php">http://archives.postgresql.org/pgsql-hackers/2007-03/msg01181.php</a>
</p>
</li><li>MONEY dumps in a locale-specific format making it difficult to
</li><li>MONEY dumps in a locale-specific format making it difficult to
restore to a system with a different locale
</li><li>Allow MONEY to be easily cast to/from other numeric data types
</li></ul>
</li><li>Text Search
<ul>
<li>Allow dictionaries to change the token that is passed on to
</li><li>Allow MONEY to be easily cast to/from other numeric data types
</li></ul>
</li><li>Text Search
<ul>
<li>Allow dictionaries to change the token that is passed on to
later dictionaries
<p> <a href="http://archives.postgresql.org/pgsql-patches/2007-11/msg00081.php">http://archives.postgresql.org/pgsql-patches/2007-11/msg00081.php</a>
</p>
</li><li>Consider a function-based API for '@@' searches
</li><li>Consider a function-based API for '@@' searches
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2007-11/msg00511.php">http://archives.postgresql.org/pgsql-hackers/2007-11/msg00511.php</a>
</p>
</li><li>Improve text search error messages
</li><li>Improve text search error messages
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2007-10/msg00966.php">http://archives.postgresql.org/pgsql-hackers/2007-10/msg00966.php</a>
<a href="http://archives.postgresql.org/pgsql-hackers/2007-11/msg01146.php">http://archives.postgresql.org/pgsql-hackers/2007-11/msg01146.php</a>
</p>
</li><li>Consider changing error to warning for strings larger than one
</li><li>Consider changing error to warning for strings larger than one
megabyte
<p> <a href="http://archives.postgresql.org/pgsql-bugs/2008-02/msg00190.php">http://archives.postgresql.org/pgsql-bugs/2008-02/msg00190.php</a>
<a href="http://archives.postgresql.org/pgsql-patches/2008-03/msg00062.php">http://archives.postgresql.org/pgsql-patches/2008-03/msg00062.php</a>
</p>
</li></ul>
</li></ul>
</li></ul>
<h1><a name="section_4">Functions</a></h1>
@ -431,7 +429,7 @@ first. There is also a developer's wiki at<br/>
</p>
</li><li>Prevent malicious functions from being executed with the permissions
of unsuspecting users
<p> Index functions are safe, so VACUUM and ANALYZE are safe too.
<p> Index functions are safe, so VACUUM and ANALYZE are safe too.
Triggers, CHECK and DEFAULT expressions, and rules are still vulnerable.
<a href="http://archives.postgresql.org/pgsql-hackers/2008-01/msg00268.php">http://archives.postgresql.org/pgsql-hackers/2008-01/msg00268.php</a>
</p>
@ -493,7 +491,7 @@ first. There is also a developer's wiki at<br/>
<a href="http://archives.postgresql.org/pgsql-hackers/2006-01/msg00767.php">http://archives.postgresql.org/pgsql-hackers/2006-01/msg00767.php</a>
<a href="http://archives.postgresql.org/pgsql-patches/2006-03/msg00233.php">http://archives.postgresql.org/pgsql-patches/2006-03/msg00233.php</a>
<a href="http://archives.postgresql.org/pgsql-hackers/2006-09/msg00662.php">http://archives.postgresql.org/pgsql-hackers/2006-09/msg00662.php</a>
<a href="http://wiki.postgresql.org/wiki/Todo:Collate">http://wiki.postgresql.org/wiki/Todo:Collate</a>
<a href="http://wiki.postgresql.org/wiki/Todo:Collate">http://wiki.postgresql.org/wiki/Todo:Collate</a>
<a href="http://wiki.postgresql.org/wiki/Todo:ICU">http://wiki.postgresql.org/wiki/Todo:ICU</a>
</p>
</li><li>Support multiple simultaneous character sets, per SQL92
@ -578,7 +576,7 @@ first. There is also a developer's wiki at<br/>
</li><li>Improve failure message when DROP DATABASE is used on a database that
has prepared transactions
</li><li>Allow prepared transactions with temporary tables created and dropped
in the same transaction, and when an ON COMMIT DELETE ROWS temporary
in the same transaction, and when an ON COMMIT DELETE ROWS temporary
table is accessed
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2008-03/msg00047.php">http://archives.postgresql.org/pgsql-hackers/2008-03/msg00047.php</a>
</p>
@ -788,12 +786,10 @@ first. There is also a developer's wiki at<br/>
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2008-02/msg00954.php">http://archives.postgresql.org/pgsql-hackers/2008-02/msg00954.php</a>
</p>
</li><li>Allow COPY to report errors sooner
</li></ul>
</li></ul>
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2008-04/msg01169.php">http://archives.postgresql.org/pgsql-hackers/2008-04/msg01169.php</a>
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2008-04/msg01169.php">http://archives.postgresql.org/pgsql-hackers/2008-04/msg01169.php</a>
</p>
<ul>
<li>GRANT/REVOKE
</li></ul>
</li><li>GRANT/REVOKE
<ul>
<li>Allow column-level privileges
</li><li>%Allow GRANT/REVOKE permissions to be applied to all schema objects
@ -825,7 +821,7 @@ first. There is also a developer's wiki at<br/>
</li><li>LISTEN/NOTIFY
<ul>
<li>Allow LISTEN/NOTIFY to store info in memory rather than tables?
<p> Currently LISTEN/NOTIFY information is stored in pg_listener.
<p> Currently LISTEN/NOTIFY information is stored in pg_listener.
Storing such information in memory would improve performance.
</p>
</li><li>Add optional textual message to NOTIFY
@ -1000,7 +996,7 @@ first. There is also a developer's wiki at<br/>
widths. Perhaps the word wrapping could use the same
algorithm documented in the W3C specification.
<a href="http://archives.postgresql.org/pgsql-hackers/2008-05/msg00404.php">http://archives.postgresql.org/pgsql-hackers/2008-05/msg00404.php</a>
<a href="http://www.w3.org/TR/CSS21/tables.html<strong>auto-table-layout">http://www.w3.org/TR/CSS21/tables.html</strong>auto-table-layout</a>
<a href="http://www.w3.org/TR/CSS21/tables.html#auto-table-layout">http://www.w3.org/TR/CSS21/tables.html#auto-table-layout</a>
<li>Add "auto" expanded mode that outputs in expanded format if
"wrapped" mode can't wrap the output to the screen width
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2008-05/msg00417.php">http://archives.postgresql.org/pgsql-hackers/2008-05/msg00417.php</a>
@ -1106,8 +1102,8 @@ first. There is also a developer's wiki at<br/>
</p>
</li></ul>
</li></ul>
</p><h1><a name="section_11">Triggers</a></h1>
<h1><a name="section_11">Triggers</a></h1>
</p>
<ul>
<li>Add deferred trigger queue file
<p> Right now all deferred trigger information is stored in backend
@ -1239,24 +1235,23 @@ first. There is also a developer's wiki at<br/>
digital trees (see Aoki)
</li></ul>
</li><li>Hash
</li></ul>
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2007-09/msg00051.php">http://archives.postgresql.org/pgsql-hackers/2007-09/msg00051.php</a>
</p>
<ul>
<li>Pack hash index buckets onto disk pages more efficiently
<ul>
<li><a href="http://archives.postgresql.org/pgsql-hackers/2007-09/msg00051.php">http://archives.postgresql.org/pgsql-hackers/2007-09/msg00051.php</a>
</li><li>Pack hash index buckets onto disk pages more efficiently
<p> Currently only one hash bucket can be stored on a page. Ideally
several hash buckets could be stored on a single page and greater
granularity used for the hash algorithm.
</p>
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2004-06/msg00168.php">http://archives.postgresql.org/pgsql-hackers/2004-06/msg00168.php</a>
</p>
</li><li>Consider sorting hash buckets so entries can be found using a
</li><li>Consider sorting hash buckets so entries can be found using a
binary search, rather than a linear scan
</li><li>In hash indexes, consider storing the hash value with or instead
</li><li>In hash indexes, consider storing the hash value with or instead
of the key itself
</li><li>Add WAL logging for crash recovery
</li><li>Allow multi-column hash indexes
</li><li>-<em>During index creation, pre-sort the tuples to improve build speed</em>
</li><li>Add WAL logging for crash recovery
</li><li>Allow multi-column hash indexes
</li><li>-<em>During index creation, pre-sort the tuples to improve build speed</em>
</li></ul>
</li></ul>
<h1><a name="section_13">Sorting</a></h1>
<ul>
@ -1321,7 +1316,7 @@ first. There is also a developer's wiki at<br/>
page of bitmaps could track 512MB of heap pages.
</p>
<p> A third idea would be for a heap scan to check if all rows are visible
and if so set a per-table flag which can be checked by index scans.
and if so set a per-table flag which can be checked by index scans.
Any change to the table would have to clear the flag. To detect
changes during the heap scan a counter could be set at the start and
checked at the end --- if it is the same, the table has not been
@ -1331,12 +1326,9 @@ first. There is also a developer's wiki at<br/>
<a href="http://archives.postgresql.org/pgsql-patches/2008-01/msg00049.php">http://archives.postgresql.org/pgsql-patches/2008-01/msg00049.php</a>
</p>
</li><li>Consider automatic caching of statements at various levels:
<ul>
<li>Parsed query tree
</li><li>Query execute plan
</li><li>Query results
<a href="http://archives.postgresql.org/pgsql-hackers/2008-04/msg00823.php">http://archives.postgresql.org/pgsql-hackers/2008-04/msg00823.php</a>
</li></ul>
Parsed query tree, query execution plan, query results
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2008-04/msg00823.php">http://archives.postgresql.org/pgsql-hackers/2008-04/msg00823.php</a>
</p>
</li><li>Consider increasing internal areas when shared buffers is increased
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2005-10/msg01419.php">http://archives.postgresql.org/pgsql-hackers/2005-10/msg01419.php</a>
</p>
@ -1401,7 +1393,7 @@ first. There is also a developer's wiki at<br/>
</li><li>Improve control of auto-vacuum
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2006-12/msg00876.php">http://archives.postgresql.org/pgsql-hackers/2006-12/msg00876.php</a>
</p>
</li><li>Prevent long-lived temporary tables from causing frozen-xid
</li><li>-<em>Prevent long-lived temporary tables from causing frozen-xid</em>
advancement starvation
<p> The problem is that autovacuum cannot vacuum them to set frozen xids;
only the session that created them can do that.
@ -1420,7 +1412,7 @@ first. There is also a developer's wiki at<br/>
<h1><a name="section_17">Locking</a></h1>
<ul>
<li>Fix priority ordering of read and write light-weight locks (Neil)
<li>Fix priority ordering of read and write light-weight locks
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2004-11/msg00893.php">http://archives.postgresql.org/pgsql-hackers/2004-11/msg00893.php</a>
<a href="http://archives.postgresql.org/pgsql-hackers/2004-11/msg00905.php">http://archives.postgresql.org/pgsql-hackers/2004-11/msg00905.php</a>
</p>
@ -1575,7 +1567,7 @@ first. There is also a developer's wiki at<br/>
catalogs and the transaction status log.
</p>
</li><li>Consider adding buffers the background writer finds reusable to the
free list
free list
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2007-04/msg00781.php">http://archives.postgresql.org/pgsql-hackers/2007-04/msg00781.php</a>
</p>
</li><li>Automatically tune bgwriter_delay based on activity rather then using a
@ -1661,7 +1653,7 @@ first. There is also a developer's wiki at<br/>
AcceptInvalidationMessages() call
<p> <a href="http://archives.postgresql.org/pgsql-committers/2007-11/msg00585.php">http://archives.postgresql.org/pgsql-committers/2007-11/msg00585.php</a>
</p>
</li><li>Improve performance of shared invalidation queue for multiple CPUs
</li><li>-<em>Improve performance of shared invalidation queue for multiple CPUs</em>
<p> <a href="http://archives.postgresql.org/pgsql-performance/2008-01/msg00023.php">http://archives.postgresql.org/pgsql-performance/2008-01/msg00023.php</a>
</p>
</li><li>Consider Cartesian joins when both relations are needed to form an
@ -1702,7 +1694,7 @@ first. There is also a developer's wiki at<br/>
</li><li>%Remove warnings created by -Wcast-align
</li><li>Move platform-specific ps status display info from ps_status.c to ports
</li><li>Add optional CRC checksum to heap and index pages
</li><li>Improve documentation to build only interfaces (Marc)
</li><li>Improve documentation to build only interfaces
</li><li>Remove or relicense modules that are not under the BSD license, if possible
</li><li>Acquire lock on a relation before building a relcache entry for it
</li><li>Allow cross-compiling by generating the zic database on the target system
@ -1830,7 +1822,7 @@ first. There is also a developer's wiki at<br/>
modification.
</p>
</li><li>Allow plug-in modules to emulate features from other databases
</li><li>Add features of Oracle-style packages (Pavel)
</li><li>Add features of Oracle-style packages
<p> A package would be a schema with session-local variables,
public/private functions, and initialization functions. It
is also possible to implement these capabilities
@ -1850,7 +1842,7 @@ first. There is also a developer's wiki at<br/>
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2008-01/msg00893.php">http://archives.postgresql.org/pgsql-hackers/2008-01/msg00893.php</a>
</p>
</li></ul>
<h1><a name="section_25">Features We Do <u>Not</u> Want</a></h1>
<h1><a name="section_25">Features We Do _Not_ Want</a></h1>
<ul>
<li>All backends running as threads in a single process (not wanted)