Release date: 2017-02-09
This release contains a variety of fixes from 9.3.15. For information about new features in the 9.3 major release, see Section E.82.
A dump/restore is not required for those running 9.3.X.
However, if your installation has been affected by the bug described in the first changelog entry below, then after updating you may need to take action to repair corrupted indexes.
Also, if you are upgrading from a version earlier than 9.3.15, see Section E.67.
Fix a race condition that could cause indexes built with
CREATE INDEX CONCURRENTLY to be
corrupt (Pavan Deolasee, Tom Lane)
CREATE INDEX CONCURRENTLY was
used to build an index that depends on a column not previously
indexed, then rows updated by transactions that ran concurrently
CREATE INDEX command could
have received incorrect index entries. If you suspect this may have
happened, the most reliable solution is to rebuild affected indexes
after installing this update.
Unconditionally WAL-log creation of the “init fork” for an unlogged table (Michael Paquier)
Previously, this was skipped when wal_level =
minimal, but actually it's necessary
even in that case to ensure that the unlogged table is properly
reset to empty after a crash.
If the stats collector dies during hot standby, restart it (Takayuki Tsunakawa)
Ensure that hot standby feedback works correctly when it's enabled at standby server start (Ants Aasma, Craig Ringer)
Check for interrupts while hot standby is waiting for a conflicting query (Simon Riggs)
Avoid constantly respawning the autovacuum launcher in a corner case (Amit Khandekar)
This fix avoids problems when autovacuum is nominally off and there are some tables that require freezing, but all such tables are already being processed by autovacuum workers.
Fix check for when an extension member object can be dropped (Tom Lane)
Extension upgrade scripts should be able to drop member objects, but this was disallowed for serial-column sequences, and possibly other cases.
ALTER TABLE preserves
index tablespace assignments when rebuilding indexes (Tom Lane,
Previously, non-default settings of default_tablespace could result in broken indexes.
Prevent dropping a foreign-key constraint if there are pending trigger events for the referenced relation (Tom Lane)
This avoids “could not
NNN” or “relation
NNN has no triggers”
Fix processing of OID column when a table with OIDs is
associated to a parent with OIDs via
TABLE ... INHERIT (Amit Langote)
The OID column should be treated the same as regular user columns in this case, but it wasn't, leading to odd behavior in later inheritance changes.
Report correct object identity during
ALTER TEXT SEARCH CONFIGURATION (Artur
The wrong catalog OID was reported to extensions such as logical decoding.
Check for serializability conflicts before reporting constraint-violation failures (Thomas Munro)
When using serializable transaction isolation, it is desirable that any error due to concurrent transactions should manifest as a serialization failure, thereby cueing the application that a retry might succeed. Unfortunately, this does not reliably happen for duplicate-key failures caused by concurrent insertions. This change ensures that such an error will be reported as a serialization error if the application explicitly checked for the presence of a conflicting key (and did not find it) earlier in the transaction.
Prevent multicolumn expansion of
UPDATE source expression (Tom
This led to “UPDATE target count mismatch --- internal error”. Now the syntax is understood as a whole-row variable, as it would be in other contexts.
Ensure that column typmods are determined accurately for
VALUES constructs (Tom
This fixes problems occurring when the first value in a column
has a determinable typmod (e.g., length for a
varchar value) but later values don't share the same
Throw error for an unfinished Unicode surrogate pair at the end of a Unicode string (Tom Lane)
Normally, a Unicode surrogate leading character must be followed
by a Unicode surrogate trailing character, but the check for this
was missed if the leading character was the last character in a
Unicode string literal (
or Unicode identifier (
Ensure that a purely negative text search query, such as
!foo, matches empty
tsvectors (Tom Dunstan)
Such matches were found by GIN index searches, but not by sequential scans or GiST index searches.
Prevent crash when
replaces a non-top-level subtree with an empty query (Artur
Fix performance problems in
ts_rewrite() (Tom Lane)
ts_rewrite()'s handling of
nested NOT operators (Tom Lane)
array_fill() to handle empty
arrays properly (Tom Lane)
Fix one-byte buffer overrun in
quote_literal_cstr() (Heikki Linnakangas)
The overrun occurred only if the input consisted entirely of single quotes and/or backslashes.
Prevent multiple calls of
pg_stop_backup() from running concurrently
This avoids an assertion failure, and possibly worse things, if someone tries to run these functions in parallel.
that aren't really no-ops (Tom Lane)
In some cases, a cast that should result in zeroing out
interval fields was mistakenly
deemed to be a no-op and discarded. An example is that casting from
INTERVAL MONTH to
INTERVAL YEAR failed to clear the months field.
Ensure that cached plans are invalidated by changes in foreign-table options (Amit Langote, Etsuro Fujita, Ashutosh Bapat)
Fix pg_dump to dump user-defined casts and transforms that use built-in functions (Stephen Frost)
Fix possible pg_basebackup failure on standby server when including WAL files (Amit Kapila, Robert Haas)
Ensure that the Python exception objects we create for PL/Python are properly reference-counted (Rafa de la Torre, Tom Lane)
This avoids failures if the objects are used after a Python garbage collection cycle has occurred.
Fix PL/Tcl to support triggers on tables that have
.tupno as a column name (Tom Lane)
This matches the (previously undocumented) behavior of PL/Tcl's
spi_execp commands, namely that a magic
.tupno column is inserted only if
there isn't a real column named that.
Allow DOS-style line endings in
~/.pgpass files, even on Unix (Vik Fearing)
This change simplifies use of the same password file across Unix and Windows machines.
Fix one-byte buffer overrun if ecpg is given a file name that ends with a dot (Takayuki Tsunakawa)
Fix psql's tab completion for
ALTER DEFAULT PRIVILEGES (Gilles
Darold, Stephen Frost)
In psql, treat an empty or
all-blank setting of the
environment variable as meaning “no pager” (Tom Lane)
Previously, such a setting caused output intended for the pager to vanish entirely.
of low-level libpq errors, such as
out-of-memory (Joe Conway)
contrib/dblink to ignore
irrelevant server options when it uses a
contrib/postgres_fdw foreign server as the source
of connection options (Corey Huinker)
Previously, if the foreign server object had options that were not also libpq connection options, an error occurred.
On Windows, ensure that environment variable changes are propagated to DLLs built with debug options (Christian Ullrich)
Sync our copy of the timezone library with IANA release tzcode2016j (Tom Lane)
This fixes various issues, most notably that timezone data installation failed if the target directory didn't support hard links.
Update time zone data files to tzdata release 2016j for DST law changes in northern Cyprus (adding a new zone Asia/Famagusta), Russia (adding a new zone Europe/Saratov), Tonga, and Antarctica/Casey. Historical corrections for Italy, Kazakhstan, Malta, and Palestine. Switch to preferring numeric zone abbreviations for Tonga.
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