PostgreSQL is a powerful, open source object-relational database system. It has more than 15 years of active development and a proven architecture that has earned it a strong reputation for reliability, data integrity, and correctness.
It is fully ACID compliant, has full support for foreign keys, joins, views, triggers, and stored procedures (in multiple languages). It includes most SQL:2008 data types, including INTEGER, NUMERIC, BOOLEAN, CHAR, VARCHAR, DATE, INTERVAL, and TIMESTAMP.
* Make pg_options_to_table return NULL for an option with no value , Previously such cases would result in a server crash.
* Fix memory leak at end of a GiST index scan , Commands that perform many separate GiST index scans, such as verification of a new GiST-based exclusion constraint on a table already containing many rows, could transiently require large amounts of memory due to this leak.
* Fix explicit reference to pg_temp schema in CREATE TEMPORARY TABLE , This used to be allowed, but failed in 9.1.0.