Fix bugs in information_schema.referential_constraints view
(Tom Lane)
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 TOAST-related data corruption during CREATE TABLE dest AS
SELECT * FROM src or INSERT INTO dest SELECT * FROM src
(Tom Lane)
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 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.
Make DatumGetInetP() unpack inet datums that have a 1-byte
header, and add a new macro, DatumGetInetPP(), that does
not (Heikki Linnakangas)
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 money type's 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 which dumped money values could
not be re-read.
Don't let transform_null_equals
affect CASE 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 CASE.
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 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 rate
(Greg Matthews)
While harmless in itself, on certain platforms this would result in
annoying kernel log messages.
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)
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_int and
contrib/dict_xsyn (Tom Lane)
Some functions incorrectly assumed that memory returned by
palloc() is guaranteed zeroed.
Honor query cancel interrupts promptly in pgstatindex()
(Robert Haas)
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 CST6, not
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.