Download Firebird 2.5.1

Firebird is a free open source relational database management system that offers ANSI SQL features runs on Linux, Windows, and a variety of Unix platforms. Features excellent concurrency & performance & powerful stored procedure & trigger language.

Some other notable features of Firebird includes Full support for stored procedures and triggers, Full ACID compliant transactions, Multi Generational Architecture (sometimes called MVCC), Support for External Functions (UDFs), Many access methods: native/API, dbExpress drivers, ODBC, OLEDB, .Net provider, JDBC native type 4 driver, Python module, PHP, Perl......

Homepage: firebirdsql.org
Type: Database Engines/Servers | Relational Database Management System
License: Mozilla Public License 1.1 (MPL 1.1)
Written in: C#, C++, Delphi/Kylix, Java, PHP, Python
Operating system: Multi-platform
Languages: English
Size(Windows): 6.52 MB
Source Code: Click Here
Donate: Click Here

What's New!!!(Changelog) for this version:

  • Significant for MacOSX 10.7 users was a bug that caused attempts to start Superserver and Superclassic to fail. The bug is described in Tracker ticket CORE-3589 and also in the Bug Fixes list for this sub-release.
  • An SQLSTATE context variable is now available in PSQL, parallel to the the context variables GDSCODE and SQLCODE that are used in WHEN blocks to test for error conditions.
  • A couple of improvements were made, that should help performance when global temporary tables (GTTs) are being used:
    • The "undoing", on rolling back the transaction, of changes made to GTTs that were created with the ON COMMIT DELETE ROWS option was an unnecessary overhead and has been bypassed.
    • Garbage collection in global temporary tables was being delayed unnecessarily by active transactions in other attachments. That bottleneck is gone.
  • A needed optimization in the temporary space manager with regard to small chunk allocations has been implemented.
  • The Lock Manager has been provided with the capability to cancel waiting, avoiding a condition whereby a transaction in WAIT mode could wait interminably for the end of another transaction that could not be achieved by either a DELETE FROM MON$xxx or an fb_cancel_operation request.
  • The query optimizer now estimates the actual record compression ratio, enabling better guesses about the number of stored records in tables.
  • Some minor improvements to the remote interface:
    • Any unused bytes of varchar values in the message buffer are now set to zero.
    • Set the SO_KEEPALIVE option on the client TCP socket.
  • The MON$STATEMENT_ID value constant is now kept constant among monitoring snapshots.
  • Ports of this sub-release were done for Linux/HPPA and Linux/alpha platforms.

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