9c5
< Last updated: Mon Nov 29 23:33:09 EST 2004
> Last updated: Tue Nov 30 00:03:37 EST 2004
13a10,16
> #A hyphen, "-", marks changes that will appear in the upcoming 8.1 release.#
>
> Bracketed items, "[]", have more detail.
>
> This list contains all known PostgreSQL bugs and feature requests. If
> you would like to work on an item, please read the developer's FAQ
> first.
> * Auto-vacuum
> o Move into the backend code
> o Scan the buffer cache to find free space or use background writer
> o Use free-space map information to guide refilling
< information, either by name or offset from UTC
> information, either zone name or offset from UTC
>
> If the TIMESTAMP value is stored with a time zone name, interval
> computations should adjust based on the time zone rules, e.g. adding
> 24 hours to a timestamp would yield a different result from adding one
> day.
>
< * Eliminate WAL logging for CREATE INDEX/REINDEX/CREATE TABLE AS when
< not doing WAL archiving
> * Eliminate WAL logging for CREATE TABLE AS when not doing WAL archiving
< * Allow GRANT/REVOKE permissions to be given to all schema objects with one
> * Allow GRANT/REVOKE permissions to be applied to all schema objects with one
60c60
< specifications. This is because new databases are created by copying
> specifications. This is because new databases are created by copying
63c63
< directory would create a new database with tables that had incorrect
> directory would create a new database with tables that had incorrect
72c72
<
>
85c85
< By not showing commented-out variables, we discourage people from
> By not showing commented-out variables, we discourage people from
91c91
< * Allow point-in-time recovery to archive partially filled write-ahead
> * Allow point-in-time recovery to archive partially filled write-ahead
102c102
< Currently all schemas are owned by the super-user because they are
> Currently all schemas are owned by the super-user because they are
128c128
< * Allow INET subnet tests with non-constants to be indexed
> * Allow INET subnet tests using non-constants to be indexed
143,144c143,144
< * Allow to_char to print localized month names
< * Allow functions to have a search path specified at creation time
> * Allow to_char() to print localized month names
> * Allow functions to have a schema search path specified at creation time
146c146
< * Add GUC variable to allow output of interval values in ISO8601 format
> * Add a GUC variable to allow output of interval values in ISO8601 format
154,155c154,155
< * Prevent inet cast to cidr if the unmasked bits are not zero, or
< zero bits
> * Prevent INET cast to CIDR if the unmasked bits are not zero, or
> zero the bits
158c158
< o Allow nulls in arrays
> o Allow NULLs in arrays
160,161c160,161
< o Delay resolution of array expression type so assignment coercion
< can be performed on empty array expressions
> o Delay resolution of array expression's data type so assignment
> coercion can be performed on empty array expressions
218,219c218,219
< key, foreign key [inheritance]
< * UNIQUE INDEX on base column not honored on inserts/updates from
> key, foreign key
> * UNIQUE INDEX on base column not honored on INSERTs/UPDATEs from
221c221
< (dup) should fail [inheritance]
> (dup) should fail
246c246
< * Fetch heap pages matching index entries in sequential order [performance]
> * Fetch heap pages matching index entries in sequential order
307c307
< functionality in DELETE. It's been agreed that the keyword should
> functionality in DELETE. It's been agreed that the keyword should
318c318
< * Allow PREPARE to automatically determine parameter types based on the SQL
> * Allow PREPARE to automatically determine parameter types based on the SQL
340,342d339
< * Allow CREATE TABLE foo (f1 INT CHECK (f1 > 0) CHECK (f1 < 10)) to work
< by searching for non-conflicting constraint names, and prefix with
< table name?
347c344
< new database.
> a new database.
350,351d346
< * Ignore temporary tables from other sessions when processing
< inheritance?
354,355c349,351
< * Add a session mode to warn about non-standard SQL usage in queries
< * Add MERGE command that does UPDATE/DELETE, or on failure, INSERT (rules, triggers?)
> * Add a GUC variable to warn about non-standard SQL usage in queries
> * Add MERGE command that does UPDATE/DELETE, or on failure, INSERT (rules,
> triggers?)
357,359c353,356
< * Add NOVICE output level for helpful messages like automatic sequence/index creation
< * Add COMMENT ON for all cluster global objects (users, groups,
< databases and tablespaces)
> * Add NOVICE output level for helpful messages like automatic sequence/index
> creation
> * Add COMMENT ON for all cluster global objects (users, groups, databases
> and tablespaces)
363c360
< When enabled, this would allow errors in multi-statement transactions
> When enabled, this would allow errors in multi-statement transactions
417c414
< o Allow COPY to optionally include column headings as the first line
> o Allow COPY to optionally include column headings in the first line
450c447
<
>
462c459
< o Handle references to temporary tables that are created, destroyed,
> o Handle references to temporary tables that are created, destroyed,
464c461
<
>
469d465
< o Improve PL/PgSQL exception handling using savepoints
488c484
<
>
503d498
<
518c513
< o Add pg_dumpall custom format dumps.
> o Add pg_dumpall custom format dumps.
520c515
< This is probably best done by combining pg_dump and pg_dumpall
> This is probably best done by combining pg_dump and pg_dumpall
532d526
< o Improve error handling (?)
555c549
< Adding shared locks requires recording the table/rows numbers in a
> Adding shared locks requires recording the table/rows numbers in a
643c637
< Posix_fadvise() can control both sequential/random file caching and
> Posix_fadvise() can control both sequential/random file caching and
703c697
< from distributted.net, http://www1.distributed.net/source,
> from distributted.net, http://www1.distributed.net/source,
729c723
< * Add connection pooling [pool]
> * Add connection pooling
755d748
<
759c752
<
>
768c761
< so an abrupt operating system restart might lose a few seconds of
> so an abrupt operating system restart might lose a few seconds of
785c778
< * Add utility to compute accurate random_page_cost value
> * Create utility to compute accurate random_page_cost value
787,789d779
< * Allow sorting, temp files, temp tables to use multiple work directories
<
< This allows the I/O load to be spread across multiple disk drives.
795a786
>
808,809c799,800
<
< * Use mmap() rather than SYSV shared memory or to write WAL files (?) [mmap]
>
> * Use mmap() rather than SYSV shared memory or to write WAL files (?)
812,813c803,804
< portability issues. Anonymous mmap (or mmap to /dev/zero) is required
< to prevent I/O overhead.
> portability issues. Anonymous mmap (or mmap to /dev/zero) is required
> to prevent I/O overhead.
817,819c808,810
< Doing I/O to large tables would consume a lot of address space or
< require frequent mapping/unmapping. Extending the file also causes
< mapping problems that might require mapping only individual pages,
> Doing I/O to large tables would consume a lot of address space or
> require frequent mapping/unmapping. Extending the file also causes
> mapping problems that might require mapping only individual pages,
821c812
< way to _prevent_ I/O to disk from the dirty shared buffers so changes
> way to _prevent_ I/O to disk from the dirty shared buffers so changes
826c817
< tuple overhead
> per-tuple overhead
829,831c820,822
< This would involve using multiple threads or processes to do optimization,
< sorting, or execution of single query. The major advantage of such a
< feature would be to allow multiple CPUs to work together to process a
> This would involve using multiple threads or processes to do optimization,
> sorting, or execution of single query. The major advantage of such a
> feature would be to allow multiple CPUs to work together to process a
834c825
< * Research the use of larger pages sizes
> * Research the use of larger page sizes
842a834
> * Move some /contrib modules out to their own project sites
845d836
< * Improve access-permissions check on data directory in Cygwin (Tom)
847,848c838
< * Clarify use of 'application' and 'command' tags in SGML docs
< * Better document ability to build only certain interfaces (Marc)
> * Improve documentation to build only interfaces (Marc)
852,853d841
< * Research interaction of setitimer() and sleep() used by statement_timeout
< * Rename /scripts directory because they are all C programs now
856,857d843
< * Allow binaries to be statically linked so they are more easily relocated
< * Move some /contrib modules out to their own project sites
862c848
< o Remove per-backend parameter file and move into shared memory?
> o Remove per-backend parameter file and move into shared memory
877,878c863,864
< o Update clients to use data types, typmod, schema.table.column names of
< result sets using new query protocol
> o Update clients to use data types, typmod, schema.table.column names
> of result sets using new query protocol
900d885
< * Kris is Kris Jurka
910c895
< * Simon is Simon Riggs
> * Simon is Simon Riggs <simon@2ndquadrant.com>
913d897
< * Teodor is
<
< * psql tab completion
<
< o Provide a list of conversions after ALTER CONVERSION?
< o Support for ALTER SEQUENCE clauses
< o Add RENAME TO to ALTER TRIGGER
< o Support for ALTER USER
< o Fix ALTER (GROUP|DOMAIN|...) <sth> DROP
< o Support for ALTER LANGUAGE <sth> RENAME TO
< o Improve support for COPY
< o Improve support for ALTER TABLE
< heap page to find matching rows.
> heap page to find matching rows, or perhaps use a mixed solution where
> tids are recorded for pages with only a few matches and per-page bitmaps
> are used for more dense pages. Another idea is to use a 32-bit bitmap
> for every page and set a bit based on the item number mod(32).
< Such indexes could be more compact if there are only a few unique values.
> Such indexes could be more compact if there are only a few distinct values.
> Such indexes can also be compressed. Keeping such indexes updated can be
> costly.
< portability issues. Anonymous mmap is required to prevent I/O
< overhead.
> portability issues. Anonymous mmap (or mmap to /dev/zero) is required
> to prevent I/O overhead.
>
> * Consider mmap()'ing files into a backend?
>
> Doing I/O to large tables would consume a lot of address space or
> require frequent mapping/unmapping. Extending the file also causes
> mapping problems that might require mapping only individual pages,
> leading to thousands of mappings. Another problem is that there is no
> way to _prevent_ I/O to disk from the dirty shared buffers so changes
> could hit disk before WAL is written.
< posix_fadvise() [fadvise]
> posix_fadvise()
>
> Posix_fadvise() can control both sequential/random file caching and
> free-behind behavior, but it is unclear how the setting affects other
> backends that also have the file open, and the feature is not supported
> on all operating systems.
>
< * CREATE TABLE AS can not determine column lengths from expressions [atttypmod]
> * Allow CREATE TABLE AS to determine column lengths for complex
> expressions like SELECT col1 || col2
< * Automatically create rules on views so they are updateable, per SQL99 [view]
> * Automatically create rules on views so they are updateable, per SQL99
>
> We can only auto-create rules for simple views. For more complex
> cases users will still have to write rules.
>
* Allow database recovery where tablespaces can't be created
When a pg_dump is restored, all tablespaces will attempt to be created
in their original locations. If this fails, the user must be able to
adjust the restore process.
< that can spam more than one table.
> that can span more than one table.
239c239
< rather than just col1
> rather than just col1; also called skip-scanning.
641c641,642
< * Add free-behind capability for large sequential scans [fadvise]
> * Allow free-behind capability for large sequential scans, perhaps using
> posix_fadvise() [fadvise]
< * Allow the creation of bitmap indexes which can be quickly combined
< with other bitmap indexes
> * Allow non-bitmap indexes to be combined by creating bitmaps in memory
259,261c258,259
< combined. Such indexes could be more compact if there are few unique
< value. Also, perhaps they can be lossy requiring a scan of the heap page
< to find matching rows.
> combined. They can index by tid or can be lossy requiring a scan of the
> heap page to find matching rows.
263c261,262
< * Allow non-bitmap indexes to be combined
> * Allow the creation of on-disk bitmap indexes which can be quickly
> combined with other bitmap indexes
265,266c264
< Do lookups on non-bitmap indexes and create bitmaps in memory that can be
< combined with other indexes.
> Such indexes could be more compact if there are few unique value.
< * Use bitmaps to combine existing indexes [performance]
> * Allow the creation of bitmap indexes which can be quickly combined
> with other bitmap indexes
255,257c256,266
< Bitmap indexes allow single indexed columns to be combined to
< dynamically create a composite index to match a specific query. Each
< index is a bitmap, and the bitmaps are AND'ed or OR'ed to be combined.
> Bitmap indexes index single columns that can be combined with other bitmap
> indexes to dynamically create a composite index to match a specific query.
> Each index is a bitmap, and the bitmaps are bitwise AND'ed or OR'ed to be
> combined. Such indexes could be more compact if there are few unique
> value. Also, perhaps they can be lossy requiring a scan of the heap page
> to find matching rows.
>
> * Allow non-bitmap indexes to be combined
>
> Do lookups on non-bitmap indexes and create bitmaps in memory that can be
> combined with other indexes.
< This perhaps should use a round-robin allocation system where several
< tablespaces are used in a cycle. The cycle pointer should be global.
> It could start with a random tablespace from a supplied list and cycle
> through the list.
< * Add a GUC variable to control the tablespace for temporary objects
> * Add a GUC variable to control the tablespace for temporary objects and
> sort files
>
> This perhaps should use a round-robin allocation system where several
> tablespaces are used in a cycle. The cycle pointer should be global.
>
< The proper solution to this will probably the use of a master/slave
< replication solution like Sloney and a connection pooling tool like
< pgpool.
> The proper solution to this will probably the use of a master/slave
> replication solution like Sloney and a connection pooling tool like
> pgpool.
114,116c114,116
< You can use any of the master/slave replication servers to use a
< standby server for data warehousing. To allow read/write queries to
< multiple servers, you need multi-master replication like pgcluster.
> You can use any of the master/slave replication servers to use a
> standby server for data warehousing. To allow read/write queries to
> multiple servers, you need multi-master replication like pgcluster.
166,167c166,167
< Currently large objects entries do not have owners. Permissions can
< only be set at the pg_largeobject table level.
> Currently large objects entries do not have owners. Permissions can
> only be set at the pg_largeobject table level.
173c173
< This requires the TOAST column to be stored EXTERNAL.
> This requires the TOAST column to be stored EXTERNAL.
359,360c359,360
< One complexity is whether moving a schema should move all existing
< schema objects or just define the location for future object creation.
> One complexity is whether moving a schema should move all existing
> schema objects or just define the location for future object creation.
364,365c364,365
< Currently non-global system tables must be in the default database
< schema. Global system tables can never be moved.
> Currently non-global system tables must be in the default database
> schema. Global system tables can never be moved.
371,375c371,375
< This might require some background daemon to maintain clustering
< during periods of low usage. It might also require tables to be only
< paritally filled for easier reorganization. Another idea would
< be to create a merged heap/index data file so an index lookup would
< automatically access the heap data too.
> This might require some background daemon to maintain clustering
> during periods of low usage. It might also require tables to be only
> paritally filled for easier reorganization. Another idea would
> be to create a merged heap/index data file so an index lookup would
> automatically access the heap data too.
379,380c379,380
< To do this, determine the ideal cluster index for each system
< table and set the cluster setting during initdb.
> To do this, determine the ideal cluster index for each system
> table and set the cluster setting during initdb.
385,386c385,386
< This requires the use of a savepoint before each COPY line is
< processed, with ROLLBACK on COPY failure.
> This requires the use of a savepoint before each COPY line is
> processed, with ROLLBACK on COPY failure.
395,398c395,398
< This requires using the row ctid to map cursor rows back to the
< original heap row. This become more complicated if WITH HOLD cursors
< are to be supported because WITH HOLD cursors have a copy of the row
< and no FOR UPDATE lock.
> This requires using the row ctid to map cursor rows back to the
> original heap row. This become more complicated if WITH HOLD cursors
> are to be supported because WITH HOLD cursors have a copy of the row
> and no FOR UPDATE lock.
405,406c405,406
< Because WITH HOLD cursors exist outside transactions, this allows
< them to be listed so they can be closed.
> Because WITH HOLD cursors exist outside transactions, this allows
> them to be listed so they can be closed.
413,415c413,415
< This is useful for returning the auto-generated key for an INSERT.
< One complication is how to handle rules that run as part of
< the insert.
> This is useful for returning the auto-generated key for an INSERT.
> One complication is how to handle rules that run as part of
> the insert.
422c422
< This is basically the same as SET search_path.
> This is basically the same as SET search_path.
426,427c426,427
< This requires a checking function to be called after the server
< configuration file is read.
> This requires a checking function to be called after the server
> configuration file is read.
432c432
< Currently only constants are supported.
> Currently only constants are supported.
438,439c438,439
< This requires the cached PL/PgSQL byte code to be invalidated when
< an object referenced in the function is changed.
> This requires the cached PL/PgSQL byte code to be invalidated when
> an object referenced in the function is changed.
512,513c512,513
< Document differences between ecpg and the SQL standard and
< information about the Informix-compatibility module.
> Document differences between ecpg and the SQL standard and
> information about the Informix-compatibility module.
* Allow a database in tablespace t1 with tables created in tablespace t2
to be used as a template for a new database created with default
tablespace t2
All objects in the default database tablespace must have default tablespace
specifications. This is because new databases are created by copying
directories. If you mix default tablespace tables and tablespace-specified
tables in the same directory, creating a new database from such a mixed
directory would create a new database with tables that had incorrect
explicit tablespaces. To fix this would require modifying pg_class in the
newly copied database, which we don't currently do.
>
> * Allow a database in tablespace t1 with tables created in tablespace t2
> to be used as a template for a new database created with default
> tablespace t2
>
> All objects in the default database tablespace must have default tablespace
> specifications. This is because new databases are created by copying
> directories. If you mix default tablespace tables and tablespace-specified
> tables in the same directory, creating a new database from such a mixed
> directory would create a new database with tables that had incorrect
> explicit tablespaces. To fix this would require modifying pg_class in the
> newly copied database, which we don't currently do.
> * Add RESET CONNECTION command to reset all session state
329a331,334
> This would include resetting of all variables (RESET ALL), dropping of
> all temporary tables, removal of any NOTIFYs, etc. This could be used
> for connection pooling. We could also change RESET ALL to have this
> functionality.
<
> * Win32
> o Remove per-backend parameter file and move into shared memory?
> o Remove configure.in check for link failure when cause is found
> o Remove readdir() errno patch when runtime/mingwex/dirent.c rev
> 1.4 is released
> o Remove psql newline patch when we find out why mingw outputs an
> extra newline
> o Allow psql to use readline once non-US code pages work with
> backslashes
Bruce Momjian