From a3faf37f49025a0a4f5dc31479c54e6b84dab07a Mon Sep 17 00:00:00 2001 From: Alvaro Herrera Date: Tue, 19 Aug 2008 03:08:56 +0000 Subject: [PATCH] Fix some issues that prevent this file to be processed by scripts. 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. --- doc/TODO | 106 ++++++++++++----------- doc/src/FAQ/TODO.html | 192 ++++++++++++++++++++---------------------- 2 files changed, 144 insertions(+), 154 deletions(-) diff --git a/doc/TODO b/doc/TODO index ef388b99be..b72882a52b 100644 --- a/doc/TODO +++ b/doc/TODO @@ -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 diff --git a/doc/src/FAQ/TODO.html b/doc/src/FAQ/TODO.html index 1dc4fe012b..b79f46d1ba 100644 --- a/doc/src/FAQ/TODO.html +++ b/doc/src/FAQ/TODO.html @@ -1,9 +1,9 @@ - - + + PostgreSQL TODO List - +

PostgreSQL TODO List

@@ -286,94 +286,92 @@ first. There is also a developer's wiki at
LC_MESSAGES

http://archives.postgresql.org/pgsql-hackers/2006-11/msg00390.php

-
  • Add ISO INTERVAL handling
    • - -

    http://archives.postgresql.org/pgsql-hackers/2006-01/msg00250.php
    - http://archives.postgresql.org/pgsql-bugs/2006-04/msg00248.php +

  • Add ISO INTERVAL handling +

    http://archives.postgresql.org/pgsql-hackers/2006-01/msg00250.php + http://archives.postgresql.org/pgsql-bugs/2006-04/msg00248.php

    -

    Functions

    @@ -431,7 +429,7 @@ first. There is also a developer's wiki at

  • 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

    @@ -493,7 +491,7 @@ first. There is also a developer's wiki at
    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 @@ -578,7 +576,7 @@ first. There is also a developer's wiki at
  • 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

    @@ -788,12 +786,10 @@ first. There is also a developer's wiki at

    http://archives.postgresql.org/pgsql-hackers/2008-02/msg00954.php

  • 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

    - +
  • GRANT/REVOKE -

    Triggers

    - +

    Triggers

    +

  • Hash -
    • -

    http://archives.postgresql.org/pgsql-hackers/2007-09/msg00051.php -

    -

    Sorting