Release date: 2011-12-05
This release contains a variety of fixes from 9.0.5. For information about new features in the 9.0 major release, see Section E.151.
A dump/restore is not required for those running 9.0.X.
However, a longstanding error was discovered in the definition
If you rely on correct results from that view, you should replace
its definition as explained in the first changelog item below.
Also, if you are upgrading from a version earlier than 9.0.4, see Section E.147.
Fix bugs in
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
pg_config --sharedir if you're
is.) This must be repeated in each database to be fixed.
Fix possible crash during
DELETE that joins to the output of a
scalar-returning function (Tom Lane)
A crash could only occur if the target row had been concurrently updated, so this problem surfaced only intermittently.
Fix incorrect replay of WAL records for GIN index updates (Tom Lane)
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
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
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 possible failures during hot standby startup (Simon Riggs)
Start hot standby faster when initial snapshot is incomplete (Simon Riggs)
Fix race condition during toast table access from stale syscache entries (Tom Lane)
The typical symptom was transient errors like “missing chunk number 0 for toast value NNNNN in pg_toast_2619”, where the cited toast table would always belong to a system catalog.
Track dependencies of functions on items used in parameter default expressions (Tom Lane)
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 parameters (Tom Lane)
Don't trust deferred-unique indexes for join removal (Tom Lane and Marti Raudsepp)
A deferred uniqueness constraint might not hold intra-transaction, so assuming that it does could give incorrect query results.
DatumGetInetP() unpack inet
datums that have a 1-byte header, and add a new macro,
DatumGetInetPP(), that does not (Heikki
This change affects no core code, but might prevent crashes in
add-on code that expects
DatumGetInetP() to produce an unpacked datum as
per usual convention.
Improve locale support in
input and output (Tom Lane)
Aside from not supporting all standard
lc_monetary formatting options, the input and
output functions were inconsistent, meaning there were locales in
money values could not be
foo WHEN NULL ... constructs (Heikki Linnakangas)
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
Change foreign-key trigger creation order to better support self-referential foreign keys (Tom Lane)
For a cascading foreign key that references its own table, a row
update will fire both the
trigger and the
CHECK trigger as one
ON UPDATE trigger must
execute first, else the
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 rate (Greg Matthews)
While harmless in itself, on certain platforms this would result in annoying kernel log messages.
Preserve configuration file name and line number values when starting child processes under Windows (Tom Lane)
Formerly, these would not be displayed correctly in the
Fix incorrect field alignment in ecpg's SQLDA area (Zoltan Boszormenyi)
Preserve blank lines within commands in psql's command history (Robert Haas)
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 (Tom Lane)
Assorted fixes for pg_upgrade (Bruce Momjian)
Handle exclusion constraints correctly, avoid failures on Windows, don't complain about mismatched toast table names in 8.4 databases.
Use the preferred version of xsubpp to build PL/Perl, not necessarily the operating system's main copy (David Wheeler and Alex Hunsaker)
Fix incorrect coding in
contrib/dict_xsyn (Tom Lane)
Some functions incorrectly assumed that memory returned by
palloc() is guaranteed zeroed.
Fix assorted errors in
contrib/unaccent's configuration file parsing
Honor query cancel interrupts promptly in
pgstatindex() (Robert Haas)
Fix incorrect quoting of log file name in macOS start script (Sidar Lopez)
Ensure VPATH builds properly install all server header files (Peter Eisentraut)
Shorten file names reported in verbose error messages (Peter Eisentraut)
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.
Fix interpretation of Windows timezone names for Central America (Tom Lane)
Map “Central America
Standard Time” to
CST6CDT, because DST is generally
not observed anywhere in Central America.
Update time zone data files to tzdata release 2011n for DST law changes in Brazil, Cuba, Fiji, Palestine, Russia, and Samoa; also historical corrections for Alaska and British East Africa.
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