* Force the default wal_sync_method to be fdatasync on Linux
* Fix "too many KnownAssignedXids" error during Hot Standby replay
* Fix race condition in lock acquisition during Hot Standby
* Avoid unnecessary conflicts during Hot Standby
* Fix assorted bugs in WAL replay logic for GIN indexes
* Fix recovery from base backup when the starting checkpoint WAL
record is not in the same WAL segment as its redo point
* Fix corner-case bug when streaming replication is enabled
immediately after creating the master database cluster
* Fix persistent slowdown of autovacuum workers when multiple workers
remain active for a long time
* Fix long-term memory leak in autovacuum launcher
* Avoid failure when trying to report an impending transaction
wraparound condition from outside a transaction
* Add support for detecting register-stack overrun on IA64
* Add a check for stack overflow in copyObject()
* Fix detection of page splits in temporary GiST indexes
* Fix error checking during early connection processing
* Improve efficiency of window functions
* Avoid memory leakage while "ANALYZE"'ing complex index expressions
* Ensure an index that uses a whole-row Var still depends on its table
* Add missing support in "DROP OWNED BY" for removing foreign data
wrapper/server privileges belonging to a user
* Do not "inline" a SQL function with multiple OUT parameters
* Fix crash when inline-ing a set-returning function whose argument
list contains a reference to an inline-able user function
* Behave correctly if ORDER BY, LIMIT, FOR UPDATE, or WITH is
attached to the VALUES part of INSERT ... VALUES
* Make the OFF keyword unreserved
This prevents problems with using off as a variable name in
PL/pgSQL. That worked before 9.0, but was now broken because
PL/pgSQL now treats all core reserved words as reserved.
* Fix constant-folding of COALESCE() expressions
This package provides the following PostgreSQL modules:
- citext
- hstore
- intarray
- isn
- ltree
- lo
- uuid-ossp
- unaccent
The "citext" module provides a case-insensitive character string type,
citext. Essentially, it internally calls lower when comparing values.
Otherwise, it behaves almost exactly like text.
The "hstore" module implements the "hstore" data type for storing sets
of key/value pairs within a single PostgreSQL value. This can be useful
in various scenarios, such as rows with many attributes that are rarely
examined, or semi-structured data. Keys and values are simply text strings.
The "intarray" module provides a number of useful functions and operators
for manipulating one-dimensional arrays of integers. There is also support
for indexed searches using some of the operators.
The "isn" module provides data types for the following international
product numbering standards: EAN13, UPC, ISBN (books), ISMN (music),
and ISSN (serials). Numbers are validated on input, and correctly
hyphenated on output.
The "ltree" module implements a data type ltree for representing
labels of data stored in a hierarchical tree-like structure.
Extensive facilities for searching through label trees are provided.
The "lo" module provides support for managing Large Objects (also called
LOs or BLOBs). This includes a data type "lo" and a trigger "lo_manage."
The "uuid-ossp" module provides functions to generate universally unique
identifiers (UUIDs) using one of several standard algorithms. There are
also functions to produce certain special UUID constants.
"unaccent" is a text search dictionary that removes accents (diacritic signs)
from lexemes. It's a filtering dictionary, which means its output is always
passed to the next dictionary (if any), unlike the normal behavior of
dictionaries. This allows accent-insensitive processing for full text search.
