* Experiment with multi-threaded backend better I/O utilization
This would allow a single query to make use of multiple I/O channels
simultaneously. One idea is to create a background reader that can
pre-fetch sequential and index scan pages needed by other backends.
This could be expanded to allow concurrent reads from multiple devices
in a partitioned table.
* Experiment with multi-threaded backend better CPU utilization
This would allow several CPUs to be used for a single query, such as
for sorting or query execution.
* Speed WAL recovery by allowing more than one page to be prefetched
This should be done utilizing the same infrastructure used for
prefetching in general to avoid introducing complex error-prone code
in WAL replay.
pg_listener modifications commanded by LISTEN and UNLISTEN until the end
of the current transaction. This allows us to hold the ExclusiveLock on
pg_listener until after commit, with no greater risk of deadlock than there
was before. Aside from fixing the race condition, this gets rid of a
truly ugly kludge that was there before, namely having to ignore
HeapTupleBeingUpdated failures during NOTIFY. There is a small potential
incompatibility, which is that if a transaction issues LISTEN or UNLISTEN
and then looks into pg_listener before committing, it won't see any resulting
row insertion or deletion, where before it would have. It seems unlikely
that anyone would be depending on that, though.
This patch also disallows LISTEN and UNLISTEN inside a prepared transaction.
That case had some pretty undesirable properties already, such as possibly
allowing pg_listener entries to be made for PIDs no longer present, so
disallowing it seems like a better idea than trying to maintain the behavior.
o Allow COPY in CSV mode to control whether a quoted zero-length
string is treated as NULL
Currently this is always treated as a zero-length string,
which generates an error when loading into an integer column
>
> * Change memory allocation for multi-byte functions so memory is
> allocated inside conversion functions
>
> Currently we preallocate memory based on worst-case usage.
* Consider increasing the number of default statistics target, and
reduce statistics target overhead
Also consider having a larger statistics target for indexed columns
and expression indexes
<
> http://archives.postgresql.org/pgsql-general/2007-06/msg00542.php
* Consider increasing the number of default statistics target, and
reduce statistics target overhead
Also consider having a larger statistics target for indexed columns
and expression indexes
> http://archives.postgresql.org/pgsql-general/2007-05/msg01228.php
>
>
> * Consider increasing the number of default statistics target, and
> reduce statistics target overhead
>
> Also consider having a larger statistics target for indexed columns
> and expression indexes
than dividing them into 1GB segments as has been our longtime practice. This
requires working support for large files in the operating system; at least for
the time being, it won't be the default.
Zdenek Kotala
variables to it. More need to be converted, but I wanted to get this in
before it conflicts with too much...
Other than just centralising the text-to-int conversion for parameters,
this allows the pg_settings view to contain a list of available options
and allows an error hint to show what values are allowed.
With the addition of multiple autovacuum workers, our choices were to delete
the check, document the interaction with autovacuum_max_workers, or complicate
the check to try to hide that interaction. Since this restriction has never
been adequate to ensure backends can't run out of pinnable buffers, it doesn't
really have enough excuse to live to justify the second or third choices.
Per discussion of a complaint from Andreas Kling (see also bug #3888).
This commit also removes several documentation references to this restriction,
but I'm not sure I got them all.
>
> * Add comments on system tables/columns using the information in
> catalogs.sgml
>
> Ideally the information would be pulled from the SGML file
> automatically.
>
>
> * Allow client certificate names to be checked against the client
> hostname
>
> This is already implemented in
> libpq/fe-secure.c::verify_peer_name_matches_certificate() but the code
> is commented out.
> * Prevent malicious functions from being executed with the permissions
> of unsuspecting users
>
> 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
>
> o Have CONSTRAINT cname NOT NULL preserve the contraint name
>
> Right now pg_attribute.attnotnull records the NOT NULL status
> of the column, but does not record the contraint name
>
<
< o To better utilize resources, restore data, primary keys, and
< indexes for a single table before restoring the next table
<
< Hopefully this will allow the CPU-I/O load to be more uniform
< for simultaneous restores. The idea is to start data restores
< for several objects, and once the first object is done, to move
< on to its primary keys and indexes. Over time, simultaneous
< data loads and index builds will be running.
< * pg_dump
> * pg_dump / pg_restore
> o Allow pg_dump to utilize multiple CPUs and I/O channels by dumping
> multiple objects simultaneously
>
> The difficulty with this is getting multiple dump processes to
> produce a single dump output file.
> 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
>
> This might require a pg_restore flag to indicate how many
> simultaneous operations should be performed. Only pg_dump's
> -Fc format has the necessary dependency information.
>
> o To better utilize resources, restore data, primary keys, and
> indexes for a single table before restoring the next table
>
> Hopefully this will allow the CPU-I/O load to be more uniform
> for simultaneous restores. The idea is to start data restores
> for several objects, and once the first object is done, to move
> on to its primary keys and indexes. Over time, simultaneous
> data loads and index builds will be running.
>
> o To better utilize resources, allow pg_restore to check foreign
> keys simultaneously, where possible
> o Allow pg_restore to create all indexes of a table
> concurrently, via a single heap scan
>
> This requires a pg_dump -Fc file because that format contains
> 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
> simultaneously
< single heap scan, and have a restore of a pg_dump somehow use it
> single heap scan, and have pg_restore use it
< http://archives.postgresql.org/pgsql-general/2007-05/msg01274.php
> * Speed WAL recovery by allowing more than one page to be prefetched
>
> This involves having a separate process that can be told which pages
> the recovery process will need in the near future.
> http://archives.postgresql.org/pgsql-hackers/2008-02/msg01279.php
>
ssh -L 3333:foo.com:5432 joe@foo.com
I think this should be changed to
ssh -L 3333:localhost:5432 joe@foo.com
The reason is that this assumes the postgres server on foo.com allows
connections from foo.com, which is not allowed by the default
listen_addresses setting. Add more detail explaining this.
pointed out by Faheem Mitha
Also change the example port number 3333 to 63333 so no one can complain
that we are stealing a reserved port number.
represented as "char ...[4]" not "int32". Since the length word is never
supposed to be accessed via this struct member anyway, this won't break
any existing code that is following the rules. The advantage is that C
compilers will no longer assume that a pointer to struct varlena is
word-aligned, which prevents incorrect optimizations in TOAST-pointer
access and perhaps other places. gcc doesn't seem to do this (at least
not at -O2), but the problem is demonstrable on some other compilers.
I changed struct inet as well, but didn't bother to touch a lot of other
struct definitions in which it wouldn't make any difference because there
were other fields forcing int alignment anyway. Hopefully none of those
struct definitions are used for accessing unaligned Datums.
- Change configure.in to use Autoconf 2.61 and update generated files.
- Update build system and documentation to support now directory variables
offered by Autoconf 2.61.
- Replace usages of PGAC_CHECK_ALIGNOF by AC_CHECK_ALIGNOF, now available
in Autoconf 2.61.
- Drop our patched version of AC_C_INLINE, as Autoconf now has the change.
outside the 32-bit-time_t range. Also, refer to Olson's tz database
as the 'zoneinfo' database, a name that upstream sometimes uses, not
'zic database' which they never use.
(or RETURNING), but only when the output name is not any SQL keyword.
This seems as close as we can get to the standard's syntax without a
great deal of thrashing. Original patch by Hiroshi Saito, amended by me.
doing anything interesting, such as calling RevalidateCachedPlan(). The
necessity of this is demonstrated by an example from Willem Buitendyk:
during a replan, the planner might try to evaluate SPI-using functions,
and so we'd better be in a clean SPI context.
A small downside of this fix is that these two functions will now fail
outright if called when not inside a SPI-using procedure (ie, a
SPI_connect/SPI_finish pair). The documentation never promised or suggested
that that would work, though; and they are normally used in concert with
other functions, mainly SPI_prepare, that always have failed in such a case.
So the odds of breaking something seem pretty low.
In passing, make SPI_is_cursor_plan's error handling convention clearer,
and fix documentation's erroneous claim that SPI_cursor_open would
return NULL on error.
Before 8.3 these functions could not invoke replanning, so there is probably
no need for back-patching.
in .bat simply did not work, and it called them in the wrong order,
some several times, and some not at all. So this unrolls all subroutine
calls.
This should fix the issues with clean deleting the wrong files reported
by Dave Page.
While at it, add the "clean dist" option to act like "make distclean",
and no longer remove the flex/bison output files by default. This shuold
fix the problem reported by Pavel Golub in bug #3909.
< * Improve deadlock detection when deleting items from shared buffers
> * Improve deadlock detection when a page cleaning lock conflicts
> with a shared buffer that is pinned
buildfarm plus a narrative description of the CPU types and operating systems
on which Postgres is likely to work. Now that we've almost completely
decoupled CPU and OS considerations, the former tabular style isn't all that
enlightening anyway. Perhaps more importantly, no one seems particularly
interested in maintaining the table by hand when we have the buildfarm.
prevent anti-wraparound vacuuming, and to caution against setting unreasonably
small values of freeze_max_age. Also put in a notice that this catalog is
likely to disappear entirely in some future release. Per discussion of
bug #3898 from Steven Flatt.
ParameterStatus message can be sent during COPY OUT: it's definitely
possible, since COPY from a SELECT subquery can trigger any user-defined
function.
>
> * Add the ability to automatically create materialized views
>
> Right now materialized views require the user to create triggers on the
> main table to keep the summary table current. SQL syntax should be able
> to manager the triggers and summary table automatically. A more
> sophisticated implementation would automatically retrieve from the
> summary table when the main table is referenced, if possible.
>
we need to be able to swallow NOTICE messages, and potentially also
ParameterStatus messages (although the latter would be a bit weird),
without exiting COPY OUT state. Fix it, and adjust the protocol documentation
to emphasize the need for this. Per off-list report from Alexander Galler.
and CLUSTER) execute as the table owner rather than the calling user, using
the same privilege-switching mechanism already used for SECURITY DEFINER
functions. The purpose of this change is to ensure that user-defined
functions used in index definitions cannot acquire the privileges of a
superuser account that is performing routine maintenance. While a function
used in an index is supposed to be IMMUTABLE and thus not able to do anything
very interesting, there are several easy ways around that restriction; and
even if we could plug them all, there would remain a risk of reading sensitive
information and broadcasting it through a covert channel such as CPU usage.
To prevent bypassing this security measure, execution of SET SESSION
AUTHORIZATION and SET ROLE is now forbidden within a SECURITY DEFINER context.
Thanks to Itagaki Takahiro for reporting this vulnerability.
Security: CVE-2007-6600
< * Allow major upgrades without dump/reload, perhaps using pg_upgrade
< [pg_upgrade]
< * Check for unreferenced table files created by transactions that were
< in-progress when the server terminated abruptly
<
< http://archives.postgresql.org/pgsql-patches/2006-06/msg00096.php
<
> * Check for unreferenced table files created by transactions that were
> in-progress when the server terminated abruptly
>
> http://archives.postgresql.org/pgsql-patches/2006-06/msg00096.php
>
< * Support table partitioning that allows a single table to be stored
< in subtables that are partitioned based on the primary key or a WHERE
< clause
< creation of rules for INSERT/UPDATE/DELETE, and constraints for
< rapid partition selection. Options could include range and hash
> creation of triggers or rules for INSERT/UPDATE/DELETE, and constraints
> for rapid partition selection. Options could include range and hash
<
< * Improve replication solutions
<
< o Load balancing
<
< 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.
<
< o Allow replication over unreliable or non-persistent links
<
<
< o Mark change-on-restart-only values in postgresql.conf
< 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.
> Currently 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.
<
< o Allow recovery.conf to allow the same syntax as
> o Allow recovery.conf to support the same syntax as
< * Allow user-defined types to specify a type modifier at table creation
< time
< * Allow all data types to cast to and from TEXT
<
< http://archives.postgresql.org/pgsql-hackers/2007-04/msg00017.php
<
<
< 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 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'
< * Allow MONEY to be cast to/from other numeric data types
> * Allow MONEY to be easily cast to/from other numeric data types
>
< * Allow functions to have a schema search path specified at creation time
< * Fix cases where invalid byte encodings are accepted by the database,
< but throw an error on SELECT
<
< http://archives.postgresql.org/pgsql-hackers/2007-03/msg00767.php
< * Improve logging of prepared statements recovered during startup
> * Improve logging of prepared transactions recovered during startup
< * Make standard_conforming_strings the default in 8.4?
> * Make standard_conforming_strings the default in 8.5?
< * Allow the count returned by SELECT, etc to be to represent as an int64
> * Allow the count returned by SELECT, etc to be represented as an int64
< o Use more reliable method for CREATE DATABASE to get a consistent
< copy of db?
< o Fix transaction restriction checks for CREATE DATABASE and
< other commands
<
< http://archives.postgresql.org/pgsql-hackers/2007-01/msg00133.php
< currently allowed.
> currently allowed. This currently is done if the table is
> created inside the same transaction block as the COPY because
> no other backends can see the table.
< o Add SET PATH for schemas?
<
< This is basically the same as SET search_path.
< o Enforce referential integrity for system tables
< o Add Oracle-style packages (Pavel)
<
< A package would be a schema with session-local variables,
< public/private functions, and initialization functions. It
< is also possible to implement these capabilities
< in all schemas and not use a separate "packages"
< syntax at all.
<
< http://archives.postgresql.org/pgsql-hackers/2006-08/msg00384.php
<
< o Add single-step debugging of functions
< o Allow RETURN to return row or record functions
<
< http://archives.postgresql.org/pgsql-patches/2005-11/msg00045.php
< http://archives.postgresql.org/pgsql-patches/2006-08/msg00397.php
< http://archives.postgresql.org/pgsql-hackers/2006-09/msg00388.php
<
< o Fix problems with RETURN NEXT on tables with
< dropped/added columns after function creation
<
< http://archives.postgresql.org/pgsql-patches/2006-02/msg00165.php
<
< * Make consistent use of long/short command options --- pg_ctl needs
< long ones, pg_config doesn't have short ones, postgres doesn't have
< enough long ones, etc.
<
<
<
< o Consider parsing the -c string into individual queries so each
< is run in its own transaction
<
< http://archives.postgresql.org/pgsql-hackers/2007-01/msg00291.php
<
<
< o Remove unnecessary function pointer abstractions in pg_dump source
< code
> o Remove unnecessary function pointer abstractions in pg_dump source
> code
<
<
< o Fix SSL retry to avoid useless repeated connection attempts and
< ensuing misleading error messages
>
<
< This is difficult because it requires datatype-specific knowledge.
<
< * Improve commit_delay handling to reduce fsync()
< * %Add an option to sync() before fsync()'ing checkpoint files
>
< * Reduce lock time during VACUUM FULL by moving tuples with read lock,
< then write lock and truncate table
<
< Moved tuples are invisible to other backends so they don't require a
< write lock. However, the read lock promotion to write lock could lead
< to deadlock situations.
<
< * Prevent long-lived temporary tables from causing frozen-xid advancement
< starvation
<
< The problem is that autovacuum cannot vacuum them to set frozen xids;
< only the session that created them can do that.
<
<
<
< o Use free-space map information to guide refilling
< o Consider logging activity either to the logs or a system view
> The problem is that autovacuum cannot vacuum them to set frozen xids;
> only the session that created them can do that.
< * Add connection pooling
<
< It is unclear if this should be done inside the backend code or done
< by something external like pgpool. The passing of file descriptors to
< existing backends is one of the difficulties with a backend approach.
<
< * Consider reducing memory used for shared buffer reference count
<
< http://archives.postgresql.org/pgsql-hackers/2007-01/msg00752.php
<
< * %Remove memory/file descriptor freeing before ereport(ERROR)
< * %Promote debug_query_string into a server-side function current_query()
< * Allow ecpg to work with MSVC and BCC
< * Add xpath_array() to /contrib/xml2 to return results as an array
< * Allow building in directories containing spaces
<
< This is probably not possible because 'gmake' and other compiler tools
< do not fully support quoting of paths with spaces.
<
< * Fix sgmltools so PDFs can be generated with bookmarks
< * Split out libpq pgpass and environment documentation sections to make
< it easier for non-developers to find
< * Use strlcpy() rather than our StrNCpy() macro
<
< http://archives.postgresql.org/pgsql-hackers/2006-09/msg02108.php
<
< o Re-enable timezone output on log_line_prefix '%t' when a
< shorter timezone string is available
< * Allow statements across databases or servers with transaction
< semantics
<
< This can be done using dblink and two-phase commit.
> * Add Oracle-style packages (Pavel)
< * Add the features of packages
> A package would be a schema with session-local variables,
> public/private functions, and initialization functions. It
> is also possible to implement these capabilities
> in any schema and not use a separate "packages"
> syntax at all.
< o Make private objects accessible only to objects in the same schema
< o Allow current_schema.objname to access current schema objects
< o Add session variables
< o Allow nested schemas
> http://archives.postgresql.org/pgsql-hackers/2006-08/msg00384.php
< * Experiment with multi-threaded backend better resource utilization
<
< This would allow a single query to make use of multiple CPU's or
< multiple I/O channels simultaneously. One idea is to create a
< background reader that can pre-fetch sequential and index scan
< pages needed by other backends. This could be expanded to allow
< concurrent reads from multiple devices in a partitioned table.
<
> * Experiment with multi-threaded backend better resource utilization
>
> This would allow a single query to make use of multiple CPU's or
> multiple I/O channels simultaneously. One idea is to create a
> background reader that can pre-fetch sequential and index scan
> pages needed by other backends. This could be expanded to allow
> concurrent reads from multiple devices in a partitioned table.
* Consider having the background writer update the transaction status
hint bits before writing out the page
Implementing this requires the background writer to have access to system
catalogs and the transaction status log.
<
< * Allow free-behind capability for large sequential scans to avoid
< kernel cache spoiling
<
< 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.
useful and confuses people who think it is the same as -U. (Eventually
we might want to re-introduce it as being an alias for -U, but that should
not happen until the switch has actually not been there for a few releases.)
Likewise in pg_dump and pg_restore. Per gripe from Robert Treat and
subsequent discussion.
with the logged event. CSV logs are now a first-class citizen along plain
text logs in that they carry much of the same information.
Per complaint from depesz on bug #3799.
hazards. Instead teach these programs to prompt for a password when
necessary, just like all our other programs.
I did not bother to invent -W switches for them, since the return on
investment seems so low.
PQconnectionNeedsPassword function that tells the right thing for whether to
prompt for a password, and improve PQconnectionUsedPassword so that it checks
whether the password used by the connection was actually supplied as a
connection argument, instead of coming from environment or a password file.
Per bug report from Mark Cave-Ayland and subsequent discussion.
< o -Allow commenting of variables in postgresql.conf to restore them
< to defaults
< o -Add a GUC variable to control the tablespace for temporary objects
< and sort files
< Monitoring
< ==========
<
< * -Allow server log information to be output as CSV format
< * -Add ability to monitor the use of temporary sort files
< * -Allow user-defined types to accept 'typmod' parameters
<
< http://archives.postgresql.org/pgsql-hackers/2005-08/msg01142.php
< http://archives.postgresql.org/pgsql-hackers/2005-09/msg00012.php
< http://archives.postgresql.org/pgsql-hackers/2006-08/msg00149.php
<
< * -Add Globally/Universally Unique Identifier (GUID/UUID)
<
< http://archives.postgresql.org/pgsql-patches/2006-09/msg00209.php
< http://archives.postgresql.org/pgsql-general/2007-01/msg00853.php
<
< * -Support a data type with specific enumerated values (ENUM)
< o -Add support for arrays of complex types
< o -Make 64-bit version of the MONEY data type
< * -Add ISO day of week format 'ID' to to_char() where Monday = 1
< * -Add a field 'isoyear' to extract(), based on the ISO week
< * -Add RESET SESSION command to reset all session state
< o -Make CLUSTER preserve recently-dead tuples per MVCC requirements
< o -Add more logical syntax CLUSTER table USING index;
< support current syntax for backward compatibility
< o -Allow UPDATE/DELETE WHERE CURRENT OF cursor
< o -Add support for MOVE cursors
< o -Allow PL/PythonU to return boolean rather than 1/0
< o -Allow psql \pset boolean variables to set to fixed values, rather
< than toggle
< o -Add -f to pg_dumpall
< Dependency Checking
< ===================
<
< * -Flush cached query plans when the dependent objects change or
< when new ANALYZE statistics are available
< * -Track dependencies in function bodies and recompile/invalidate
< * -Invalidate prepared queries, like INSERT, when the table definition
< is altered
<
< * -Allow use of indexes to search for NULLs
< * -Allow the creation of indexes with mixed ascending/descending
< specifiers
< * -Reduce checkpoint performance degredation by forcing data to disk
< more evenly
< * -Allow sequential scans to take advantage of other concurrent
< sequential scans, also called "Synchronised Scanning"
< * -Consider shrinking expired tuples to just their headers
< * -Allow heap reuse of UPDATEd rows if no indexed columns are changed,
< and old and new versions are on the same heap page
< * -Reduce XID consumption of read-only queries
< o -Turn on by default
< o -Allow multiple vacuums so large tables do not starve small
< tables
< * -Allow the pg_xlog directory location to be specified during initdb
< with a symlink back to the /data location
< * -Allow buffered WAL writes and fsync
< * -Allow ORDER BY ... LIMIT # to select high/low value without sort or
< index using a sequential scan for highest/lowest values
< * -Merge xmin/xmax/cmin/cmax back into three header fields
< o -Support a smaller header for short variable-length fields
< * -Move NAMEDATALEN from postgres_ext.h to pg_config_manual.h
< * -Fix problem with excessive logging during SSL disconnection
<
< http://archives.postgresql.org/pgsql-bugs/2006-12/msg00122.php
< http://archives.postgresql.org/pgsql-bugs/2007-05/msg00065.php
<
< o -Add long file support for binary pg_dump output
to ensure that the resulting webpages have predictable URLs, instead of
ever-changing numeric IDs. The new contrib docs were the biggest
offender, but some old stuff had the problem too. Also, rename a couple
of new contrib sgml files for consistency's sake.
useful consequence of the former liberal implicit casting to text;
namely that you can feed non-string values to quote_literal() and get
unsurprising results. Per discussion.
to a UNION, CASE, or related construct are of the same domain type. The
main part of this routine smashes domains to their base types, which seems
necessary because the logic involves TypeCategory() and IsPreferredType(),
neither of which work usefully on domains. However, we can add a first
pass that just detects whether all the inputs are exactly the same type,
and if so accept that without question (so long as it's not UNKNOWN).
Per recent gripe from Dean Rasheed.
In passing, remove some tests for InvalidOid, which have clearly been dead
code for quite some time now, because getBaseType() would fail on that input.
Also, clarify the manual's not-very-precise description of the existing
algorithm's behavior.
< * Prevent long-lived temporary tables from causing frozen-Xid advancement
> * Prevent long-lived temporary tables from causing frozen-xid advancement
>
> The problem is that autovacuum cannot vacuum them to set frozen xids;
> only the session that created them can do that.
>
>
>
Allow tag and entity names that follow XML rules. Provide for hexadecimal
as well as decimal numeric entities. Adjust code names to coincide with
new descriptions.
< o Prevent COMMENT ON dbname from issuing a warning when loading
< into a database with a different name, perhaps using COMMENT ON
< CURRENT DATABASE
> o Change pg_dump so that a comment on the dumped database is
> applied to the loaded database, even if the database has a
> different name. This will require new backend syntax, perhaps
> COMMENT ON CURRENT DATABASE.
< o Allow COMMENT ON dbname to work when loading into a database
< with a different name, perhaps using COMMENT ON CURRENT
< DATABASE
> o Prevent COMMENT ON dbname from issuing a warning when loading
> into a database with a different name, perhaps using COMMENT ON
> CURRENT DATABASE
of this seems a bit marginal, if it's useful enough to be shown in the manual
then we probably ought to support doing it without double evaluation of the
ts_rank function. Per my proposal earlier today.
gives the old behavior; selecting false allows the dictionary to be used
as a filter ahead of other dictionaries, because it will pass on rather
than accept words that aren't in its stopword list.
Jan Urbanski
Tatsuo Ishii
Bruce Momjian
Magnus Hagander
Tom Lane
Alvaro Herrera
Peter Eisentraut
Andrew Dunstan
Neil Conway