Release date: 2010-03-15
This release contains a variety of fixes from 8.4.2. For information about new features in the 8.4 major release, see Section E.164.
A dump/restore is not required for those running 8.4.X. However, if you are upgrading from a version earlier than 8.4.2, see Section E.162.
Add new configuration parameter ssl_renegotiation_limit
to control how often we do
session key renegotiation for an SSL connection (Magnus)
This can be set to zero to disable renegotiation completely, which may be required if a broken SSL library is used. In particular, some vendors are shipping stopgap patches for CVE-2009-3555 that cause renegotiation attempts to fail.
Fix possible deadlock during backend startup (Tom)
Fix possible crashes due to not handling errors during relcache reload cleanly (Tom)
Fix possible crash due to use of dangling pointer to a cached plan (Tatsuo)
Fix possible crash due to overenthusiastic invalidation of
cached plan for ROLLBACK
(Tom)
Fix possible crashes when trying to recover from a failure in subtransaction start (Tom)
Fix server memory leak associated with use of savepoints and a client encoding different from server's encoding (Tom)
Fix incorrect WAL data emitted during end-of-recovery cleanup of a GIST index page split (Yoichi Hirai)
This would result in index corruption, or even more likely an error during WAL replay, if we were unlucky enough to crash during end-of-recovery cleanup after having completed an incomplete GIST insertion.
Fix bug in WAL redo cleanup method for GIN indexes (Heikki)
Fix incorrect comparison of scan key in GIN index search (Teodor)
Make substring()
for bit
types treat any negative length as meaning
“all the rest of the
string” (Tom)
The previous coding treated only -1 that way, and would produce an invalid result value for other negative values, possibly leading to a crash (CVE-2010-0442).
Fix integer-to-bit-string conversions to handle the first fractional byte correctly when the output bit width is wider than the given integer by something other than a multiple of 8 bits (Tom)
Fix some cases of pathologically slow regular expression matching (Tom)
Fix bug occurring when trying to inline a SQL function that returns a set of a composite type that contains dropped columns (Tom)
Fix bug with trying to update a field of an element of a composite-type array column (Tom)
Avoid failure when EXPLAIN
has to
print a FieldStore or assignment ArrayRef expression (Tom)
These cases can arise now that EXPLAIN
VERBOSE
tries to print plan node target lists.
Avoid an unnecessary coercion failure in some cases where an
undecorated literal string appears in a subquery within
UNION
/INTERSECT
/EXCEPT
(Tom)
This fixes a regression for some cases that worked before 8.4.
Avoid undesirable rowtype compatibility check failures in some cases where a whole-row Var has a rowtype that contains dropped columns (Tom)
Fix the STOP WAL LOCATION
entry in
backup history files to report the next WAL segment's name when the
end location is exactly at a segment boundary (Itagaki
Takahiro)
Always pass the catalog ID to an option validator function
specified in CREATE FOREIGN DATA
WRAPPER
(Martin Pihlak)
Fix some more cases of temporary-file leakage (Heikki)
This corrects a problem introduced in the previous minor release. One case that failed is when a plpgsql function returning set is called within another function's exception handler.
Add support for doing FULL JOIN ON
FALSE
(Tom)
This prevents a regression from pre-8.4 releases for some queries that can now be simplified to a constant-false join condition.
Improve constraint exclusion processing of boolean-variable cases, in particular make it possible to exclude a partition that has a “bool_column = false” constraint (Tom)
Prevent treating an INOUT
cast as
representing binary compatibility (Heikki)
Include column name in the message when warning about inability to grant or revoke column-level privileges (Stephen Frost)
This is more useful than before and helps to prevent confusion
when a REVOKE
generates multiple
messages, which formerly appeared to be duplicates.
When reading pg_hba.conf
and
related files, do not treat @something
as a file inclusion request if the @
appears inside quote marks; also, never treat @
by itself as a file inclusion request (Tom)
This prevents erratic behavior if a role or database name starts
with @
. If you need to include a file
whose path name contains spaces, you can still do so, but you must
write @"/path to/file"
rather than
putting the quotes around the whole construct.
Prevent infinite loop on some platforms if a directory is named
as an inclusion target in pg_hba.conf
and related files (Tom)
Fix possible infinite loop if SSL_read
or SSL_write
fails without setting errno
(Tom)
This is reportedly possible with some Windows versions of openssl.
Disallow GSSAPI authentication on local connections, since it requires a hostname to function correctly (Magnus)
Protect ecpg against applications freeing strings unexpectedly (Michael)
Make ecpg report the proper SQLSTATE if the connection disappears (Michael)
Fix translation of cell contents in psql \d
output
(Heikki)
Fix psql's numericlocale
option to not format strings it
shouldn't in latex and troff output formats (Heikki)
Fix a small per-query memory leak in psql (Tom)
Make psql return the correct
exit status (3) when ON_ERROR_STOP
and
--single-transaction
are both
specified and an error occurs during the implied COMMIT
(Bruce)
Fix pg_dump's output of permissions for foreign servers (Heikki)
Fix possible crash in parallel pg_restore due to out-of-range dependency IDs (Tom)
Fix plpgsql failure in one case where a composite column is set to NULL (Tom)
Fix possible failure when calling PL/Perl functions from PL/PerlU or vice versa (Tim Bunce)
Add volatile
markings in PL/Python
to avoid possible compiler-specific misbehavior (Zdenek Kotala)
Ensure PL/Tcl initializes the Tcl interpreter fully (Tom)
The only known symptom of this oversight is that the Tcl
clock
command misbehaves if using Tcl
8.5 or later.
Prevent ExecutorEnd
from being run
on portals created within a failed transaction or subtransaction
(Tom)
This is known to cause issues when using contrib/auto_explain
.
Prevent crash in contrib/dblink
when too many key columns are specified to a dblink_build_sql_*
function (Rushabh Lathia, Joe
Conway)
Allow zero-dimensional arrays in contrib/ltree
operations (Tom)
This case was formerly rejected as an error, but it's more
convenient to treat it the same as a zero-element array. In
particular this avoids unnecessary failures when an ltree
operation is applied to the result of
ARRAY(SELECT ...)
and the sub-select
returns no rows.
Fix assorted crashes in contrib/xml2
caused by sloppy memory management
(Tom)
Make building of contrib/xml2
more
robust on Windows (Andrew)
Fix race condition in Windows signal handling (Radu Ilie)
One known symptom of this bug is that rows in pg_listener
could be dropped under heavy
load.
Make the configure script report failure if the C compiler does not provide a working 64-bit integer datatype (Tom)
This case has been broken for some time, and no longer seems worth supporting, so just reject it at configure time instead.
Update time zone data files to tzdata release 2010e for DST law changes in Bangladesh, Chile, Fiji, Mexico, Paraguay, Samoa.
If you see anything in the documentation that is not correct, does not match your experience with the particular feature or requires further clarification, please use this form to report a documentation issue.