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25. By Martin Pitt on 2012-09-25

* New upstream bug fix release: (LP: #1055944)
  - Fix planner's assignment of executor parameters, and fix executor's
    rescan logic for CTE plan nodes.
    These errors could result in wrong answers from queries that scan
    the same WITH subquery multiple times.
  - Improve page-splitting decisions in GiST indexes.
    Multi-column GiST indexes might suffer unexpected bloat due to this
  - Fix cascading privilege revoke to stop if privileges are still held.
    If we revoke a grant option from some role "X", but "X" still holds
    that option via a grant from someone else, we should not
    recursively revoke the corresponding privilege from role(s) "Y"
    that "X" had granted it to.
  - Fix handling of SIGFPE when PL/Perl is in use.
    Perl resets the process's SIGFPE handler to SIG_IGN, which could
    result in crashes later on. Restore the normal Postgres signal
    handler after initializing PL/Perl.
  - Prevent PL/Perl from crashing if a recursive PL/Perl function is
    redefined while being executed.
  - Work around possible misoptimization in PL/Perl.
    Some Linux distributions contain an incorrect version of
    "pthread.h" that results in incorrect compiled code in PL/Perl,
    leading to crashes if a PL/Perl function calls another one that
    throws an error.

24. By Martin Pitt on 2012-01-05

* Add 00git_inet_cidr_unpack.patch: Revert the behavior of inet/cidr
  functions to not unpack the arguments. This fixes the memory leak when
  sorting inet values. Patch taken from upstream git HEAD. Spotted during
  testing in LP #904631.
* 01-armel-tas.patch: Turn slock_t datatype into an int, and define
  S_UNLOCK() to call __sync_lock_release() instead of using the default
  implementation. This complies to the gcc built-in atomic operations
  specifiction more strictly and now also works on the Panda boards.
  (LP: #904828)

23. By Martin Pitt on 2011-12-15

* New upstream release (LP: #904631):
  - Fix bugs in information_schema.referential_constraints view.
    This view was being insufficiently careful about matching the
    foreign-key constraint to the depended-on primary or unique key
    constraint. That could result in failure to show a foreign key
    constraint at all, or showing it multiple times, or claiming that
    it depends on a different constraint than the one it really does.
    Since the view definition is installed by initdb, merely upgrading
    will not fix the problem. If you need to fix this in an existing
    installation, you can (as a superuser) drop the information_schema
    schema then re-create it by sourcing
    "SHAREDIR/information_schema.sql". (Run pg_config --sharedir if
    you're uncertain where "SHAREDIR" is.) This must be repeated in
    each database to be fixed.
  - Fix incorrect replay of WAL records for GIN index updates.
    This could result in transiently failing to find index entries
    after a crash, or on a hot-standby server. The problem would be
    repaired by the next "VACUUM" of the index, however.
  - Fix TOAST-related data corruption during CREATE TABLE dest AS
    SELECT - FROM src or INSERT INTO dest SELECT * FROM src.
    If a table has been modified by "ALTER TABLE ADD COLUMN", attempts
    to copy its data verbatim to another table could produce corrupt
    results in certain corner cases. The problem can only manifest in
    this precise form in 8.4 and later, but we patched earlier versions
    as well in case there are other code paths that could trigger the
    same bug.
  - Fix race condition during toast table access from stale syscache
  - Track dependencies of functions on items used in parameter default
    expressions. Previously, a referenced object could be dropped without
    having dropped or modified the function, leading to misbehavior when the
    function was used. Note that merely installing this update will not fix
    the missing dependency entries; to do that, you'd need to "CREATE OR
    REPLACE" each such function afterwards. If you have functions whose
    defaults depend on non-built-in objects, doing so is recommended.
  - Allow inlining of set-returning SQL functions with multiple OUT
  - Make DatumGetInetP() unpack inet datums that have a 1-byte header,
    and add a new macro, DatumGetInetPP(), that does not.
  - Improve locale support in money type's input and output.
    Aside from not supporting all standard lc_monetary formatting
    options, the input and output functions were inconsistent, meaning
    there were locales in which dumped money values could not be
  - Don't let transform_null_equals affect CASE foo WHEN NULL ...
    constructs. transform_null_equals is only supposed to affect foo = NULL
    expressions written directly by the user, not equality checks
    generated internally by this form of CASE.
  - Change foreign-key trigger creation order to better support
    self-referential foreign keys. For a cascading foreign key that
    references its own table, a row update will fire both the ON UPDATE
    trigger and the CHECK trigger as one event. The ON UPDATE trigger must
    execute first, else the CHECK will check a non-final state of the row
    and possibly throw an inappropriate error. However, the firing order of
    these triggers is determined by their names, which generally sort in
    creation order since the triggers have auto-generated names following
    the convention "RI_ConstraintTrigger_NNNN". A proper fix would require
    modifying that convention, which we will do in 9.2, but it seems risky
    to change it in existing releases. So this patch just changes the
    creation order of the triggers. Users encountering this type of error
    should drop and re-create the foreign key constraint to get its triggers
    into the right order.
  - Avoid floating-point underflow while tracking buffer allocation
  - Preserve blank lines within commands in psql's command history.
    The former behavior could cause problems if an empty line was
    removed from within a string literal, for example.
  - Fix pg_dump to dump user-defined casts between auto-generated
    types, such as table rowtypes.
  - Use the preferred version of xsubpp to build PL/Perl, not
    necessarily the operating system's main copy.
  - Fix incorrect coding in "contrib/dict_int" and "contrib/dict_xsyn".
  - Honor query cancel interrupts promptly in pgstatindex().
  - Ensure VPATH builds properly install all server header files.
  - Shorten file names reported in verbose error messages.
    Regular builds have always reported just the name of the C file
    containing the error message call, but VPATH builds formerly
    reported an absolute path name.

22. By Martin Pitt on 2011-10-04

* New upstream bug fix/security release: (LP: #866049)
   - Fix bugs in indexing of in-doubt HOT-updated tuples.
     These bugs could result in index corruption after reindexing a
     system catalog. They are not believed to affect user indexes.
   - Fix multiple bugs in GiST index page split processing.
     The probability of occurrence was low, but these could lead to
     index corruption.
   - Fix possible buffer overrun in tsvector_concat().
     The function could underestimate the amount of memory needed for
     its result, leading to server crashes.
   - Fix crash in xml_recv when processing a "standalone" parameter.
   - Make pg_options_to_table return NULL for an option with no value.
     Previously such cases would result in a server crash.
   - Avoid possibly accessing off the end of memory in "ANALYZE" and in
     SJIS-2004 encoding conversion.
     This fixes some very-low-probability server crash scenarios.
   - Prevent intermittent hang in interactions of startup process with
     bgwriter process.
     This affected recovery in non-hot-standby cases.
   - Fix race condition in relcache init file invalidation.
     There was a window wherein a new backend process could read a stale
     init file but miss the inval messages that would tell it the data
     is stale. The result would be bizarre failures in catalog accesses,
     typically "could not read block 0 in file ..." later during
   - Fix memory leak at end of a GiST index scan.
     Commands that perform many separate GiST index scans, such as
     verification of a new GiST-based exclusion constraint on a table
     already containing many rows, could transiently require large
     amounts of memory due to this leak.
   - Fix incorrect memory accounting (leading to possible memory bloat)
     in tuplestores supporting holdable cursors and plpgsql's RETURN
     NEXT command.
   - Fix performance problem when constructing a large, lossy bitmap.
   - Fix join selectivity estimation for unique columns.
     This fixes an erroneous planner heuristic that could lead to poor
     estimates of the result size of a join.
   - Fix nested PlaceHolderVar expressions that appear only in
     sub-select target lists. This mistake could result in outputs of an
     outer join incorrectly appearing as NULL.
   - Allow nested EXISTS queries to be optimized properly.
   - Fix array- and path-creating functions to ensure padding bytes are
     zeroes. This avoids some situations where the planner will think that
     semantically-equal constants are not equal, resulting in poor
   - Fix "EXPLAIN" to handle gating Result nodes within inner-indexscan
     subplans. The usual symptom of this oversight was "bogus varno" errors.
   - Work around gcc 4.6.0 bug that breaks WAL replay. This could lead to
     loss of committed transactions after a server crash.
   - Fix dump bug for VALUES in a view.
   - Disallow SELECT FOR UPDATE/SHARE on sequences.
     This operation doesn't work as expected and can lead to failures.
   - Fix "VACUUM" so that it always updates pg_class.reltuples/relpages.
     This fixes some scenarios where autovacuum could make increasingly
     poor decisions about when to vacuum tables.
   - Defend against integer overflow when computing size of a hash table.
   - Fix cases where "CLUSTER" might attempt to access already-removed
     TOAST data.
   - Fix portability bugs in use of credentials control messages for
     "peer" authentication.
   - Fix SSPI login when multiple roundtrips are required.
     The typical symptom of this problem was "The function requested is
     not supported" errors during SSPI login.
   - Throw an error if "pg_hba.conf" contains hostssl but SSL is
     disabled. This was concluded to be more user-friendly than the
     previous behavior of silently ignoring such lines.
   - Fix typo in pg_srand48 seed initialization.
     This led to failure to use all bits of the provided seed. This
     function is not used on most platforms (only those without
     srandom), and the potential security exposure from a
     less-random-than-expected seed seems minimal in any case.
   - Avoid integer overflow when the sum of LIMIT and OFFSET values
     exceeds 2^63.
   - Add overflow checks to int4 and int8 versions of generate_series().
   - Fix trailing-zero removal in to_char(). In a format with FM and no
     digit positions after the decimal point, zeroes to the left of the
     decimal point could be removed incorrectly.
   - Fix pg_size_pretty() to avoid overflow for inputs close to 2^63.
   - Weaken plpgsql's check for typmod matching in record values.
     An overly enthusiastic check could lead to discarding length
     modifiers that should have been kept.
   - Fix pg_upgrade to preserve toast tables' relfrozenxids during an
     upgrade from 8.3. Failure to do this could lead to "pg_clog" files
     being removed too soon after the upgrade.
   - Fix psql's counting of script file line numbers during COPY from a
     different file.
   - Fix pg_restore's direct-to-database mode for
     standard_conforming_strings. pg_restore could emit incorrect commands
     when restoring directly to a database server from an archive file that
     had been made with standard_conforming_strings set to on.
   - Be more user-friendly about unsupported cases for parallel
     pg_restore. This change ensures that such cases are detected and
     reported before any restore actions have been taken.
   - Fix write-past-buffer-end and memory leak in libpq's LDAP service
     lookup code.
   - In libpq, avoid failures when using nonblocking I/O and an SSL
   - Improve libpq's handling of failures during connection startup.
     In particular, the response to a server report of fork() failure
     during SSL connection startup is now saner.
   - Improve libpq's error reporting for SSL failures.
   - Fix PQsetvalue() to avoid possible crash when adding a new tuple to
     a PGresult originally obtained from a server query.
   - Make ecpglib write double values with 15 digits precision.
   - In ecpglib, be sure LC_NUMERIC setting is restored after an error.
   - Apply upstream fix for blowfish signed-character bug
     (CVE-2011-2483) (Closes: #631285)
     "contrib/pg_crypto"'s blowfish encryption code could give wrong
     results on platforms where char is signed (which is most), leading
     to encrypted passwords being weaker than they should be.
   - Fix memory leak in "contrib/seg".
   - Fix pgstatindex() to give consistent results for empty indexes.
   - Allow building with perl 5.14. (Closes: #628503)

21. By Martin Pitt on 2011-04-20

* New upstream bug fix release: (LP: #767165)
  - If your installation was upgraded from a previous major release by
    running pg_upgrade, you should take action to prevent possible data loss
    due to a now-fixed bug in pg_upgrade. The recommended solution is to run
    "VACUUM FREEZE" on all TOAST tables. More information is available at
  - Fix pg_upgrade's handling of TOAST tables.
    This error poses a significant risk of data loss for installations
    that have been upgraded with pg_upgrade. This patch corrects the
    problem for future uses of pg_upgrade, but does not in itself cure
    the issue in installations that have been processed with a buggy
    version of pg_upgrade.
  - Suppress incorrect "PD_ALL_VISIBLE flag was incorrectly set"
  - Disallow including a composite type in itself.
  - Avoid potential deadlock during catalog cache initialization.
  - Fix dangling-pointer problem in BEFORE ROW UPDATE trigger handling
    when there was a concurrent update to the target tuple.
  - Disallow "DROP TABLE" when there are pending deferred trigger
    events for the table.
    Formerly the "DROP" would go through, leading to "could not open
    relation with OID nnn" errors when the triggers were eventually
  - Prevent crash triggered by constant-false WHERE conditions during
    GEQO optimization.
  - Improve planner's handling of semi-join and anti-join cases.
  - Fix selectivity estimation for text search to account for NULLs.
  - Improve PL/pgSQL's ability to handle row types with dropped columns.
  - Fix PL/Python memory leak involving array slices.
  - Fix pg_restore to cope with long lines (over 1KB) in TOC files.
  - Put in more safeguards against crashing due to division-by-zero
    with overly enthusiastic compiler optimization. (Closes: #616180)

20. By Matthias Klose on 2011-03-15

Fix definition of bool on ppc64.

19. By Martin Pitt on 2011-02-01

* New upstream security/bug fix release:
  - Fix buffer overrun in "contrib/intarray"'s input function for the
    query_int type.
    This bug is a security risk since the function's return address
    could be overwritten. Thanks to Apple Inc's security team for
    reporting this issue and supplying the fix. (CVE-2010-4015)
  - Avoid failures when "EXPLAIN" tries to display a simple-form CASE
    If the CASE's test expression was a constant, the planner could
    simplify the CASE into a form that confused the expression-display
    code, resulting in "unexpected CASE WHEN clause" errors.
  - Fix assignment to an array slice that is before the existing range
    of subscripts.
    If there was a gap between the newly added subscripts and the first
    pre-existing subscript, the code miscalculated how many entries
    needed to be copied from the old array's null bitmap, potentially
    leading to data corruption or crash.
  - Avoid unexpected conversion overflow in planner for very distant
    date values.
    The date type supports a wider range of dates than can be
    represented by the timestamp types, but the planner assumed it
    could always convert a date to timestamp with impunity.
  - Fix pg_restore's text output for large objects (BLOBs) when
    standard_conforming_strings is on.
    Although restoring directly to a database worked correctly, string
    escaping was incorrect if pg_restore was asked for SQL text output
    and standard_conforming_strings had been enabled in the source
  - Fix erroneous parsing of tsquery values containing ... &
    !(subexpression) | ... .
    Queries containing this combination of operators were not executed
    correctly. The same error existed in "contrib/intarray"'s query_int
    type and "contrib/ltree"'s ltxtquery type.
  - Fix bug in "contrib/seg"'s GiST picksplit algorithm.
    This could result in considerable inefficiency, though not actually
    incorrect answers, in a GiST index on a seg column. If you have
    such an index, consider "REINDEX"ing it after installing this
    update. (This is identical to the bug that was fixed in
    "contrib/cube" in the previous update.)

18. By Martin Pitt on 2010-12-18

* New upstream bug fix release:
  - Force the default wal_sync_method to be fdatasync on Linux.
    The default on Linux has actually been fdatasync for many years,
    but recent kernel changes caused PostgreSQL to choose open_datasync
    instead. This choice did not result in any performance improvement,
    and caused outright failures on certain filesystems, notably ext4
    with the data=journal mount option.
  - Fix assorted bugs in WAL replay logic for GIN indexes.
    This could result in "bad buffer id: 0" failures or corruption of
    index contents during replication.
  - Fix recovery from base backup when the starting checkpoint WAL
    record is not in the same WAL segment as its redo point.
  - Fix persistent slowdown of autovacuum workers when multiple workers
    remain active for a long time.
    The effective vacuum_cost_limit for an autovacuum worker could drop
    to nearly zero if it processed enough tables, causing it to run
    extremely slowly.
  - Add support for detecting register-stack overrun on IA64.
    The IA64 architecture has two hardware stacks. Full prevention of
    stack-overrun failures requires checking both.
  - Add a check for stack overflow in copyObject().
    Certain code paths could crash due to stack overflow given a
    sufficiently complex query.
  - Fix detection of page splits in temporary GiST indexes.
    It is possible to have a "concurrent" page split in a temporary
    index, if for example there is an open cursor scanning the index
    when an insertion is done. GiST failed to detect this case and
    hence could deliver wrong results when execution of the cursor
  - Fix error checking during early connection processing.
    The check for too many child processes was skipped in some cases,
    possibly leading to postmaster crash when attempting to add the new
    child process to fixed-size arrays.
  - Improve efficiency of window functions.
    Certain cases where a large number of tuples needed to be read in
    advance, but work_mem was large enough to allow them all to be held
    in memory, were unexpectedly slow. percent_rank(), cume_dist() and
    ntile() in particular were subject to this problem.
  - Avoid memory leakage while "ANALYZE"'ing complex index expressions.
  - Ensure an index that uses a whole-row Var still depends on its
    An index declared like create index i on t (foo(t.-)) would not
    automatically get dropped when its table was dropped.
  - Do not "inline" a SQL function with multiple OUT parameters.
    This avoids a possible crash due to loss of information about the
    expected result rowtype.
  - Behave correctly if ORDER BY, LIMIT, FOR UPDATE, or WITH is
    attached to the VALUES part of INSERT ... VALUES.
  - Fix constant-folding of COALESCE() expressions.
    The planner would sometimes attempt to evaluate sub-expressions
    that in fact could never be reached, possibly leading to unexpected
  - Fix postmaster crash when connection acceptance (accept() or one of
    the calls made immediately after it) fails, and the postmaster was
    compiled with GSSAPI support.
  - Fix missed unlink of temporary files when log_temp_files is active.
    If an error occurred while attempting to emit the log message, the
    unlink was not done, resulting in accumulation of temp files.
  - Add print functionality for InhRelation nodes.
    This avoids a failure when debug_print_parse is enabled and certain
    types of query are executed.
  - Fix incorrect calculation of distance from a point to a horizontal
    line segment.
    This bug affected several different geometric distance-measurement
  - Fix incorrect calculation of transaction status in ecpg.
  - Fix PL/pgSQL's handling of "simple" expressions to not fail in
    recursion or error-recovery cases.
  - Fix PL/Python's handling of set-returning functions.
    Attempts to call SPI functions within the iterator generating a set
    result would fail.
  - Fix bug in "contrib/cube"'s GiST picksplit algorithm.
    This could result in considerable inefficiency, though not actually
    incorrect answers, in a GiST index on a cube column. If you have
    such an index, consider "REINDEX"ing it after installing this
  - Don't emit "identifier will be truncated" notices in
    "contrib/dblink" except when creating new connections.
  - Fix potential coredump on missing public key in "contrib/pgcrypto".
  - Fix memory leak in "contrib/xml2"'s XPath query functions.

17. By Matthias Klose on 2010-12-09

Rebuild with python 2.7 as the python default.

16. By Martin Pitt on 2010-11-17

debian/control: Build against libedit instead of libreadline. We can't
simultaneously link against readline (GPL) and libssl (incompatible with
GPL). (Closes: #603598)

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