locks that logically should not be released, because when a subtransaction
overwrites XMAX all knowledge of the previous lock state is lost. It seems
unlikely that we will be able to fix this before 8.3...
subtransaction are released if the subtransaction aborts --- in user-level
terminology, this means either rolling back to a savepoint or escaping from
a plpgsql exception block. Per recent suggestion from Simon.
vacuum/analyze timestamp columns at the end, rather than at a random
spot in the middle as in the original patch. This was deemed more usable
as well as less likely to break existing application code. initdb forced
accordingly. In passing, remove former kluge for initializing
pg_stat_file()'s pg_proc entry --- bootstrap mode was fixed recently
so that this can be done without any hacks, but I overlooked this usage.
This patch, against xfunc.sgml, adds a new subsection 33.9.12, Shared
Memory and LWLocks in C-Language Functions, describing how shared memory
and lwlocks may be requested by C add-in functions.
Marc Munro
of caveats in different places, but close together. One called caveats,
one not. That looks like it just led to somebody not reading some
appropriate caveats in the second group of caveats (on -admin).
Simon Riggs
want to direct MSI downloads to main download site, NT4 not supported
anymore, msvc build env in progress, pgsql-hackers-win32 is no more.
Magnus Hagander
the variabelist with a more concise table, add a URL for each project,
remove some orphaned projects, add PL/Py, and various other changes.
Initial patch from Robert Treat, subsequent work by Neil Conway.
that discusses CVS. Remove the recommendation to use cvs 1.10. Remove
discussion of alleged CVSup binaries on postgresql.org, because they
have not existed for several years. Remove discussion of how to
build cvsup from source because the existing text is outdated, and
more accurate information is available from the CVSup homepage.
consistently capitalize the content of the "Description" column but do
not include a terminating period, as is the convention elsewhere in the
docs. Also, remove the "References" column from catalog that do not
have any referencing columns, for the sake of brevity. Make various
other SGML and grammar fixes.
in PITR scenarios. We now WAL-log the replacement of old XIDs with
FrozenTransactionId, so that such replacement is guaranteed to propagate to
PITR slave databases. Also, rather than relying on hint-bit updates to be
preserved, pg_clog is not truncated until all instances of an XID are known to
have been replaced by FrozenTransactionId. Add new GUC variables and
pg_autovacuum columns to allow management of the freezing policy, so that
users can trade off the size of pg_clog against the amount of freezing work
done. Revise the already-existing code that forces autovacuum of tables
approaching the wraparound point to make it more bulletproof; also, revise the
autovacuum logic so that anti-wraparound vacuuming is done per-table rather
than per-database. initdb forced because of changes in pg_class, pg_database,
and pg_autovacuum catalogs. Heikki Linnakangas, Simon Riggs, and Tom Lane.
command strings inserts relative not absolute path of file to process.
This is a side-effect of 2005-07-04 change that makes the server use
relative paths in general. Noted by Bernd Helmle.
reference pages documenting that these commands cannot be used within
a transaction block. Also make some minor improvements to the psql
reference page. Patch from Simon Riggs, minor editorialization by
myself.
< * Improve port/qsort() to handle sorts with 50% unique and 50% duplicate
< value [qsort]
<
< This involves choosing better pivot points for the quicksort.
<
timezone actually has a daylight-savings rule. This avoids breaking
cases that used to work because they went through the DecodePosixTimezone
code path. Per contrib regression failures (mea culpa for not running
those yesterday...). Also document the already-applied change to allow
GMT offsets up to 14 hours.
input routines. Remove the former "DecodePosixTimezone" function in favor of
letting the zic code handle POSIX-style zone specs (see tzparse()). In
particular this means that "PST+3" now means the same as "-03", whereas it
used to mean "-11" --- the zone abbreviation is effectively just a noise word
in this syntax. Make sure that all named and POSIX-style zone names will be
parsed as a single token. Fix long-standing bogosities in printing and input
of fractional-hour timezone offsets (since the tzparse() code will accept
these, we'd better make 'em work). Also correct an error in the original
coding of the zic-zone-name patch: in "timestamp without time zone" input,
zone names are supposed to be allowed but ignored, but the coding was such
that the zone changed the interpretation anyway.
example SET TIME ZONE 'america/new_york' works now. This seems a good
idea on general user-friendliness grounds, and is part of the solution
to the timestamp-input parsing problems I noted recently.
one of the program's core data structures, make use of the existing
ability to selectively exclude TOC items by ID. Slightly more code but
much less likely to create future maintenance problems.
to process all inclusion switches then all exclusion switches, so that the
behavior is independent of switch ordering.
Use of -T does not cause non-table objects to be suppressed. And
the patterns are now interpreted the same way psql's \d commands do it,
rather than as pure regex commands; this allows for example -t schema.tab
to do what it should have been doing all along. Re-enable the --blobs
switch to do something useful, ie, add back blobs into a dump they were
otherwise suppressed from.
portable long options. But we have had portable long options for a long
time now, so this is obsolete. Now people have added options which *only*
work with -X but not as regular long option, so I'm putting a stop to this:
-X is deprecated; it still works, but it has been removed from the
documentation, and please don't add more of them.
max_stack_depth is not set to an unsafe value.
This commit also provides configure-time checking for <sys/resource.h>,
and cleans up some perhaps-unportable code associated with use of that
include file and getrlimit().
> * Allow more complex user/database default GUC settings
> Currently, ALTER USER and ALTER DATABASE support per-user and
> per-database defaults. Consider adding per-user-and-database
> defaults so things like search_path can be defaulted for a
> specific user connecting to a specific database.
>
>
present; intervening positions are filled with nulls. This behavior
is required by SQL99 but was not implementable before 8.2 due to lack
of support for nulls in arrays. I have only made it work for the
one-dimensional case, which is all that SQL99 requires. It seems quite
complex to get it right in higher dimensions, and since we never allowed
extension at all in higher dimensions, I think that must count as a
future feature addition not a bug fix.
the SQL spec, viz IS NULL is true if all the row's fields are null, IS NOT
NULL is true if all the row's fields are not null. The former coding got
this right for a limited number of cases with IS NULL (ie, those where it
could disassemble a ROW constructor at parse time), but was entirely wrong
for IS NOT NULL. Per report from Teodor.
I desisted from changing the behavior for arrays, since on closer inspection
it's not clear that there's any support for that in the SQL spec. This
probably needs more consideration.
< o Add command to archive partially filled write-ahead logs? [pitr]
<
< Currently only full WAL files are archived. This means that the
< most recent transactions aren't available for recovery in case
< of a disk failure.
<
Reorder:
< o %Create dump tool for write-ahead logs for use in determining
< transaction id for point-in-time recovery
> o %Create dump tool for write-ahead logs for use in determining
> transaction id for point-in-time recovery
not in the character set supported by DocBook nor standard HTML. (Sorry
Volkan.) Also replace random character-set references by a pointer to
the actual standard.
Stark, additional fixes and editorialization by Neil Conway. Greg's patch
description:
Some more doc patches for partitioned tables. In particular replace
the caveat that INCLUDING CONSTRAINTS doesn't exist and replace it
with documentation of, well, INCLUDING CONSTRAINTS.
Also, there was an instance of "LIKE WITH DEFAULTS" which is
actually spelled "LIKE INCLUDING DEFAULTS".
< #A hyphen, "-", marks changes that will appear in the upcoming 8.2 release.#
> #A hyphen, "-", marks changes that will appear in the upcoming 8.3 release.#
< * -Make postmater and postgres options distinct so the postmaster -o
< option is no longer needed
< * -Allow pooled connections to list all prepared statements
<
< This would allow an application inheriting a pooled connection to know
< the statements prepared in the current session.
<
< * -Re-enable the GUC full_page_writes in 8.2 when reliability issues have
< been addressed
< o -Add "include file" functionality in postgresql.conf
< o -Allow per-database permissions to be set via GRANT
<
< Allow database connection checks based on GRANT rules in
< addition to the existing access checks in pg_hba.conf.
<
< o -Issue a warning if a change-on-restart-only postgresql.conf value
> o Issue a warning if a change-on-restart-only postgresql.conf value
< o -Automatically force archiving of partially-filled WAL files when
< pg_stop_backup() is called or the server is stopped
< o -Add reporting of the current WAL file and offset, perhaps as
< part of partial log file archiving
< * -Allow server logs to be remotely read and removed using SQL commands
< * -Allow protocol-level BIND parameter values to be logged
< * -Zero umasked bits in conversion from INET cast to CIDR
< * -Prevent INET cast to CIDR from dropping netmask, SELECT '1.1.1.1'::inet::cidr
< * -Allow INET + INT8 to increment the host part of the address or
< throw an error on overflow
< * -Add 'tid != tid ' operator for use in corruption recovery
< o -Allow customization of the known set of TZ names (generalize the
< present australian_timezones hack)
< o -Allow timezone names in SQL strings, '2006-05-24 21:11
< Americas/New_York'::timestamptz
< o -Add support for day-time syntax, INTERVAL '1 2:03:04' DAY TO
< SECOND
< o -Allow NULLs in arrays
< * -Add transaction_timestamp(), statement_timestamp(), clock_timestamp()
< functionality
<
< Current CURRENT_TIMESTAMP returns the start time of the current
< transaction, and gettimeofday() returns the wallclock time. This will
< make time reporting more consistent and will allow reporting of
< the statement start time.
<
< * -Allow to_char() to print localized month names
< * -Add sleep() function, remove from regress.c
< * -Allow user-defined functions retuning a domain value to enforce domain
< constraints
< * -Allow TRUNCATE ... CASCADE/RESTRICT
<
< This is like DELETE CASCADE, but truncates.
<
< * -Add COMMENT ON for all cluster global objects (roles, databases
< and tablespaces)
< * -Make row-wise comparisons work per SQL spec
<
< Right now, '(a, b) < (1, 2)' is processed as 'a < 1 and b < 2', but
< the SQL standard requires it to be processed as a column-by-column
< comparison, so the proper comparison is '(a < 1) OR (a = 1 AND b < 2)'.
<
< * -Enable escape_string_warning and standard_conforming_strings
> * Enable standard_conforming_strings
< o -Add ON COMMIT capability to CREATE TABLE AS ... SELECT
< o -Allow an alias to be provided for the target table in
< UPDATE/DELETE (Neil)
< o -Allow UPDATE tab SET ROW (col, ...) = (val, ...) for updating
< multiple columns
< o -Add ALTER TABLE tab INHERIT / NO INHERIT parent
< o -Have COPY return the number of rows loaded/unloaded?
< o -Allow COPY (SELECT ...) TO 'filename'
<
< o -Allow pooled connections to list all open WITH HOLD cursors
<
< Because WITH HOLD cursors exist outside transactions, this allows
< them to be listed so they can be closed.
<
< o -Allow INSERT INTO tab (col1, ..) VALUES (val1, ..), (val2, ..)
< o -Allow INSERT/UPDATE ... RETURNING new.col or old.col
< o -Allow PL/python to return composite types and result sets
<
< * -Have initdb set the input DateStyle (MDY or DMY) based on locale
< o -Improve psql's handling of multi-line statements
<
< Currently, while \e saves a single statement as one entry, interactive
< statements are saved one line at a time. Ideally all statements
< would be saved like \e does.
<
< o -Allow multi-line column values to align in the proper columns
<
< If the second output column value is 'a\nb', the 'b' should appear
< in the second display column, rather than the first column as it
< does now.
<
< o -Display IN, INOUT, and OUT parameters in \df
< o -Allow pg_dump to use multiple -t and -n switches, exclusion
< ability, and regular expression object matching
< o -Update pg_dump and psql to use the new COPY libpq API (Christopher)
< o -Add a function to support Parse/DescribeStatement capability
< * -Add fillfactor to control reserved free space during index creation
< * -Add system view to show free space map contents
< * -Allow installing to directories containing spaces
<
< This is possible if proper quoting is added to the makefiles for the
< install targets. Because PostgreSQL supports relocatable installs, it
< is already possible to install into a directory that doesn't contain
< spaces and then copy the install to a directory with spaces.
<
< * -%Clean up compiler warnings (especially with gcc version 4)
< * -Remove BeOS and QNX-specific code
< o -Port contrib/xml2
an SQL dump if an error occurs. Along the way, make some improvements and
copy-edits to the surrounding text. Patch from Simon Riggs, additional
fixes by Neil Conway.
contrib functionality. Along the way, remove the USER_LOCKS configuration
symbol, since it no longer makes any sense to try to compile that out.
No user documentation yet ... mmoncure has promised to write some.
Thanks to Abhijit Menon-Sen for creating a first draft to work from.
>
> * Set client encoding based on the client operating system encoding
>
> Currently client_encoding is set in postgresql.conf, which
> defaults to the server encoding.
the table being analyzed. This prevents two ANALYZEs from running
concurrently on the same table and possibly suffering concurrent-update
failures while trying to store their results into pg_statistic. The
downside is that a database-wide ANALYZE executed within a transaction
block will hold ShareUpdateExclusiveLock on many tables simultaneously,
which could lead to concurrency issues or even deadlock against another
such ANALYZE. However, this seems a corner case of less importance
than getting unexpected errors from a foreground ANALYZE when autovacuum
elects to analyze the same table concurrently. Per discussion.
< o Reorder physical storage order to reduce padding?
<
< This involves having the user-specified order of columns
< be different from the physical order. SELECT * would
< need to reorder the physical values to match the
< user-specified ordering.
<
< o Store disk pages with no alignment/padding?
<
< This necessitates adding CPU-required padding when moving
< rows from disk to memory.
<
< One idea is to store the header in network byte order (high bits
< first), and read the high bits to determine the header length.
< http://archives.postgresql.org/pgsql-hackers/2006-09/msg00848.php
> One idea is to create zero-or-one-byte-header versions
> of varlena data types. In involves setting the high-bit and
> 0-127 length in the single-byte header, or clear the high bit
> and store the 7-bit ASCII value in the rest of the byte.
> The small-header versions have no alignment requirements.
> http://archives.postgresql.org/pgsql-hackers/2006-09/msg01372.php
and create a new view pg_timezone_names that provides information about
the zones known in the 'zic' database. Magnus Hagander, with some
additional work by Tom Lane.
alias with the old name for backwards compatibility. Per discussion,
the old name is actively wrong because validity and well-formedness
have different meanings in XML.
a schema is our own temp schema or another backend's temp schema, and use
these in place of some former kluges in information_schema. Per my
proposal of yesterday.
< o Store disk pages with no alignment/padding?
>
> This involves having the user-specified order of columns
> be different from the physical order. SELECT * would
> need to reorder the physical values to match the
> user-specified ordering.
>
> o Store disk pages with no alignment/padding?
>
> This necessitates adding CPU-required padding when moving
> rows from disk to memory.
>
>
> http://archives.postgresql.org/pgsql-hackers/2006-09/msg00848.php
>
< * Research storing disk pages with no alignment/padding
> * Consider ways of storing rows more compactly on disk
>
> o Store disk pages with no alignment/padding?
> o Reorder physical storage order to reduce padding?
> o Support a smaller header for short variable-length fields?
> o Reduce the row header size?
agreed these symbols are less easily confused. I made new pg_operator
entries (with new OIDs) for the old names, so as to provide backward
compatibility while making it pretty easy to remove the old names in
some future release cycle. This commit only touches the core datatypes,
contrib will be fixed separately.
than being equivalent to setting log_min_duration_statement to zero, this
option now forces logging of all query durations, but doesn't force logging
of query text. Also, add duration logging coverage for fastpath function
calls.
proposal. Parameter logging works even for binary-format parameters, and
logging overhead is avoided when disabled.
log_statement = all output for the src/test/examples/testlibpq3.c example
now looks like
LOG: statement: execute <unnamed>: SELECT * FROM test1 WHERE t = $1
DETAIL: parameters: $1 = 'joe''s place'
LOG: statement: execute <unnamed>: SELECT * FROM test1 WHERE i = $1::int4
DETAIL: parameters: $1 = '2'
and log_min_duration_statement = 0 results in
LOG: duration: 2.431 ms parse <unnamed>: SELECT * FROM test1 WHERE t = $1
LOG: duration: 2.335 ms bind <unnamed> to <unnamed>: SELECT * FROM test1 WHERE t = $1
DETAIL: parameters: $1 = 'joe''s place'
LOG: duration: 0.394 ms execute <unnamed>: SELECT * FROM test1 WHERE t = $1
DETAIL: parameters: $1 = 'joe''s place'
LOG: duration: 1.251 ms parse <unnamed>: SELECT * FROM test1 WHERE i = $1::int4
LOG: duration: 0.566 ms bind <unnamed> to <unnamed>: SELECT * FROM test1 WHERE i = $1::int4
DETAIL: parameters: $1 = '2'
LOG: duration: 0.173 ms execute <unnamed>: SELECT * FROM test1 WHERE i = $1::int4
DETAIL: parameters: $1 = '2'
(This example demonstrates the folly of ignoring parse/bind steps for duration
logging purposes, BTW.)
Along the way, create a less ad-hoc mechanism for determining which commands
are logged by log_statement = mod and log_statement = ddl. The former coding
was actually missing quite a few things that look like ddl to me, and it
did not handle EXECUTE or extended query protocol correctly at all.
This commit does not do anything about the question of whether log_duration
should be removed or made less redundant with log_min_duration_statement.
that has parameters is always planned afresh for each Bind command,
treating the parameter values as constants in the planner. This removes
the performance penalty formerly often paid for using out-of-line
parameters --- with this definition, the planner can do constant folding,
LIKE optimization, etc. After a suggestion by Andrew@supernews.
can create or modify rules for the table. Do setRuleCheckAsUser() while
loading rules into the relcache, rather than when defining a rule. This
ensures that permission checks for tables referenced in a rule are done with
respect to the current owner of the rule's table, whereas formerly ALTER TABLE
OWNER would fail to update the permission checking for associated rules.
Removal of separate RULE privilege is needed to prevent various scenarios
in which a grantee of RULE privilege could effectively have any privilege
of the table owner. For backwards compatibility, GRANT/REVOKE RULE is still
accepted, but it doesn't do anything. Per discussion here:
http://archives.postgresql.org/pgsql-hackers/2006-04/msg01138.php
of the syntax as this fundamentally dead-end approach can, in particular
combinations of single and multi column assignments. Improve rather
inadequate documentation and provide some regression tests.
> * Simplify ability to create partitioned tables
>
> This would allow creation of partitioned tables without requiring
> creation of rules for INSERT/UPDATE/DELETE, and constraints for
> rapid partition selection. Options could include range and hash
> partition selection.
>
> * Allow auto-selection of partitioned tables for min/max() operations
< Last updated: Sat Sep 2 08:31:04 EDT 2006
> Last updated: Sat Sep 2 16:31:46 EDT 2006
< o Allow UPDATE tab SET ROW (col, ...) = (...) for updating multiple
< columns
> o -Allow UPDATE tab SET ROW (col, ...) = (val, ...) for updating
> multiple columns
> o Allow UPDATE tab SET ROW (col, ...) = (SELECT...)
< A subselect can also be used as the value source.
RETURNING play nice with views/rules. To wit, have the rule rewriter
rewrite any RETURNING clause found in a rule to produce what the rule's
triggering query asked for in its RETURNING clause, in particular drop
the RETURNING clause if no RETURNING in the triggering query. This
leaves the responsibility for knowing how to produce the view's output
columns on the rule author, without requiring any fundamental changes
in rule semantics such as adding new rule event types would do. The
initial implementation constrains things to ensure that there is
exactly one, unconditionally invoked RETURNING clause among the rules
for an event --- later we might be able to relax that, but for a post
feature freeze fix it seems better to minimize how much invention we do.
Per gripe from Jaime Casanova.
"server_version" but uses the handy PG_VERSION_NUM which allows apps to
do things like if ($version >= 80200) without having to parse apart the
value of server_version themselves.
Greg Sabino Mullane greg@turnstep.com
< Last updated: Tue Aug 29 12:21:52 EDT 2006
> Last updated: Wed Aug 30 20:34:28 EDT 2006
< o Allow COPY (SELECT ...) TO 'filename'
<
< COPY should also be able to output views using COPY (SELECT
< * FROM view) TO 'filename' internally.
< http://archives.postgresql.org/pgsql-patches/2005-09/msg00148.php
> o -Allow COPY (SELECT ...) TO 'filename'
queries via a cursor, fetching a limited number of rows at a time and
therefore not risking exhausting memory. A disadvantage of the scheme
is that 'aligned' output mode will align each group of rows independently
leading to odd-looking output, but all the other output formats work
reasonably well. Chris Mair, with some additional hacking by moi.
optionally bind. I re-added the "statement:" label so people will
understand why the line is being printed (it is log_*statement
behavior).
Use single quotes for bind values, instead of double quotes, and double
literal single quotes in bind values (and document that). I also made
use of the DETAIL line to have much cleaner output.
> o Allow DEFERRABLE and end-of-statement UNIQUE constraints?
>
> This would allow UPDATE tab SET col = col + 1 to work if col has
> a unique index. Currently, uniqueness checks are done while the
> command is being executed, rather than at the end of the statement
> or transaction.
>
<
< * Allow DEFERRABLE and end-of-statement UNIQUE constraints?
<
< This would allow UPDATE tab SET col = col + 1 to work if col has
< a unique index. Currently, uniqueness checks are done while the
< command is being executed, rather than at the end of the statement
< or transaction.
< * Allow DEFERRABLE UNIQUE constraints?
> * Allow DEFERRABLE and end-of-statement UNIQUE constraints?
>
> This would allow UPDATE tab SET col = col + 1 to work if col has
> a unique index. Currently, uniqueness checks are done while the
> command is being executed, rather than at the end of the statement
> or transaction.
>
Fix all the standard PLs to be able to return tuples from FOO_RETURNING
statements as well as utility statements that return tuples. Also,
fix oversight that SPI_processed wasn't set for a utility statement
returning tuples. Per recent discussion.
< * All backends running as threads in a single process (not want)
> * All backends running as threads in a single process (not wanted)
< * Optimizer hints (not want)
> * Optimizer hints (not wanted)
>
> * Allow AS in "SELECT col AS label" to be optional (not wanted)
>
> Because we support postfix operators, it isn't possible to make AS
> optional and continue to use bison.
> http://archives.postgresql.org/pgsql-sql/2006-08/msg00164.php
< o Allow COPY to output from SELECT
> o Allow COPY (SELECT ...) TO 'filename'
< COPY should also be able to output views.
> COPY should also be able to output views using COPY (SELECT
> * FROM view) TO 'filename' internally.
of the transaction ID counter. Nothing is done with the epoch except to
store it in checkpoint records, but this provides a foundation with which
add-on code can pretend that XIDs never wrap around. This is a severely
trimmed and rewritten version of the xxid patch submitted by Marko Kreen.
Per discussion, the epoch counter seems the only part of xxid that really
needs to be in the core server.
< * %Disallow changing DEFAULT expression of a SERIAL column?
<
< This should be done only if the existing SERIAL problems cannot be
< fixed.
<
< * %Disallow ALTER SEQUENCE changes for SERIAL sequences because pg_dump
< does not dump the changes
by abandoning the idea that it should say SERIAL in the dump. Instead,
dump serial sequences and column defaults just like regular ones.
Add a new backend command ALTER SEQUENCE OWNED BY to let pg_dump recreate
the sequence-to-column dependency that was formerly created "behind the
scenes" by SERIAL. This restores SERIAL to being truly "just a macro"
consisting of component operations that can be stated explicitly in SQL.
Furthermore, the new command allows sequence ownership to be reassigned,
so that old mistakes can be cleaned up.
Also, downgrade the OWNED-BY dependency from INTERNAL to AUTO, since there
is no longer any very compelling argument why the sequence couldn't be
dropped while keeping the column. (This forces initdb, to be sure the
right kinds of dependencies are in there.)
Along the way, add checks to prevent ALTER OWNER or SET SCHEMA on an
owned sequence; you can now only do this indirectly by changing the
owning table's owner or schema. This is an oversight in previous
releases, but probably not worth back-patching.
that ps_status provides by appending 'waiting' to the PS display. This
completes the project of making it feasible to turn off process title
updates and instead rely on pg_stat_activity. Per my suggestion a few
weeks ago.
than N seconds apart. This allows a simple, if not very high performance,
means of guaranteeing that a PITR archive is no more than N seconds behind
real time. Also make pg_current_xlog_location return the WAL Write pointer,
add pg_current_xlog_insert_location to return the Insert pointer, and fix
pg_xlogfile_name_offset to return its results as a two-element record instead
of a smashed-together string, as per recent discussion.
Simon Riggs
found. Besides stopping those early who have no dtrace installed
whatsoever, this will also alert those who have dtrace in /usr/sbin, which
might not be in the path, which would produce confusing failures much later
in the build process.
Add documentation about pointing configure to find dtrace.
such as debugging and performance measurement. This consists of two features:
a table of "rendezvous variables" that allows separately-loaded shared
libraries to communicate, and a new GUC setting "local_preload_libraries"
that allows libraries to be loaded into specific sessions without explicit
cooperation from the client application. To make local_preload_libraries
as flexible as possible, we do not restrict its use to superusers; instead,
it is restricted to load only libraries stored in $libdir/plugins/. The
existing LOAD command has also been modified to allow non-superusers to
LOAD libraries stored in this directory.
This patch also renames the existing GUC variable preload_libraries to
shared_preload_libraries (after a suggestion by Simon Riggs) and does some
code refactoring in dfmgr.c to improve clarity.
Korry Douglas, with a little help from Tom Lane.
merely a matter of fixing the error check, since the underlying Portal
infrastructure already handles it. This in turn allows these statements
to be used in some existing plpgsql and plperl contexts, such as a
plpgsql FOR loop. Also, do some marginal code cleanup in places that
were being sloppy about distinguishing SELECT from SELECT INTO.
< o Allow INSERT/UPDATE ... RETURNING new.col or old.col
<
< 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.
< http://archives.postgresql.org/pgsql-patches/2005-07/msg00568.php
> o -Allow INSERT/UPDATE ... RETURNING new.col or old.col
plpgsql support to come later. Along the way, convert execMain's
SELECT INTO support into a DestReceiver, in order to eliminate some ugly
special cases.
Jonah Harris and Tom Lane
>
>
> Features We Do _Not_ Want
> =========================
>
> * All backends running as threads in a single process (not want)
>
> This eliminates the process protection we get from the current setup.
> Thread creation is usually the same overhead as process creation on
> modern systems, so it seems unwise to use a pure threaded model.
>
> * Optimizer hints (not want)
>
> Optimizer hints are used to work around problems in the optimizer. We
> would rather have the problems reported and fixed.
> http://archives.postgresql.org/pgsql-hackers/2006-08/msg00506.php
< A package would be a schema with its own variables,
< private functions, and initialization functions. It
> A package would be a schema with public/private variables,
> public/private functions, and initialization functions. It
< private functions, and initialization functions
> 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.
loaded libraries: call functions _PG_init() and _PG_fini() if the library
defines such symbols. Hence we no longer need to specify an initialization
function in preload_libraries: we can assume that the library used the
_PG_init() convention, instead. This removes one source of pilot error
in use of preloaded libraries. Original patch by Ralf Engelschall,
preload_libraries changes by me.
< o Automatically force archiving of partially-filled WAL files when
> o -Automatically force archiving of partially-filled WAL files when
<
< Doing this will allow administrators to know more easily when
< the archive contains all the files needed for point-in-time
< recovery.
< http://archives.postgresql.org/pgsql-patches/2005-04/msg00121.php
<
< o Add reporting of the current WAL file and offset, perhaps as
> o -Add reporting of the current WAL file and offset, perhaps as
<
< The offset allows parts of a WAL file to be archived using
< an external program.
<
o print user name for all
o print portal name if defined for all
o print query for all
o reduce log_statement header to single keyword
o print bind parameters as DETAIL if text mode
to happen automatically during pg_stop_backup(). Add some functions for
interrogating the current xlog insertion point and for easily extracting
WAL filenames from the hex WAL locations displayed by pg_stop_backup
and friends. Simon Riggs with some editorialization by Tom Lane.
the DROP pass rather than the ADD_CONSTR pass. On examining the code I
think this was just an oversight rather than intentional, and it seems
to satisfy the principle of least surprise better than the alternative
solution that was discussed. Add an example to the ref page showing how
to do ALTER TYPE and update the default in one command. Per gripe from
Markus Bertheau that that wasn't possible.
(table or index) before trying to open its relcache entry. This fixes
race conditions in which someone else commits a change to the relation's
catalog entries while we are in process of doing relcache load. Problems
of that ilk have been reported sporadically for years, but it was not
really practical to fix until recently --- for instance, the recent
addition of WAL-log support for in-place updates helped.
Along the way, remove pg_am.amconcurrent: all AMs are now expected to support
concurrent update.
created in the bootstrap phase proper, rather than added after-the-fact
by initdb. This is cleaner than before because it allows us to retire the
undocumented ALTER TABLE ... CREATE TOAST TABLE command, but the real reason
I'm doing it is so that toast tables of shared catalogs will now have
predetermined OIDs. This will allow a reasonably clean solution to the
problem of locking tables before we load their relcache entries, to appear
in a forthcoming patch.
the float8 versions of the aggregates, which is all that the standard requires.
Sergey's original patch also provided versions using numeric arithmetic,
but given the size and slowness of the code, I doubt we ought to include
those in core.
the opportunity to treat COUNT(*) as a zero-argument aggregate instead
of the old hack that equated it to COUNT(1); this is materially cleaner
(no more weird ANYOID cases) and ought to be at least a tiny bit faster.
Original patch by Sergey Koposov; review, documentation, simple regression
tests, pg_dump and psql support by moi.
< o Allow point-in-time recovery to archive partially filled
< write-ahead logs? [pitr]
> o Add command to archive partially filled write-ahead logs? [pitr]
< of a disk failure. This could be triggered by a user command or
< a timer.
> of a disk failure.
< recovery. A function call to do this would also be useful.
> recovery.
> o Add reporting of the current WAL file and offset, perhaps as
> part of partial log file archiving
>
> The offset allows parts of a WAL file to be archived using
> an external program.
>
< o Add reporting of the current WAL file and offset, perhaps as
< part of partial log file archiving
<
< The offset allows parts of a WAL file to be archived using
< an external program.
< o Add reporting of the current WAL file, perhaps as part of
< partial log file archiving
> o Add reporting of the current WAL file and offset, perhaps as
> part of partial log file archiving
configuration files that can be altered by a DBA. The australian_timezones
GUC setting disappears, replaced by a timezone_abbreviations setting (set this
to 'Australia' to get the effect of australian_timezones). The list of zone
names defined by default has undergone a bit of cleanup, too. Documentation
still needs some work --- in particular, should we fix Table B-4, or just get
rid of it? Joachim Wieland, with some editorializing by moi.
