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Developer's Report: Firebird Core Development & Coordination
May 2014 to October 2014

October 2014
New development:
  • CORE-3526: Support for WHEN SQLSTATE
  • CORE-2530: Denser data stream and better prefetch logic in the network protocol
  • CORE-4568: Server may crash while disconnecting from the database under load
  • Fixed regression with NULL items of the message not beng zero-initialized
September 2014
New development:
  • CORE-4564: Add per-table performance counters to the monitoring tables
  • CORE-2897: Don't send full length of field over the wire when field is null
  • Optimized the shared counters code for SS
  • CORE-4532: Server crashes while reserving a table under high load
August 2014
New development:
  • CORE-4528: Allow hash/merge joins for non-field (dbkey or derived expression) equalities
  • Added specific error code for read conflicts in RC NO_REC_VER mode
  • Added more record-level performance counters
  • CORE-4530: DB_KEY based join of two tables may be ineffective
  • Fixed regression in the trace reporting UPDATES in statistics when doing INSERT into <some_table>
  • Fixed a crash when the database monitoring is used concurrently under load
  • Fixed possible deadlocks between a worker thread and an attachment-level AST
July 2014
New development:
  • Improved synchronization and performance of the monitoring requests
  • Improved the detailed plan output
  • CORE-4500: Firebird crashes after unsuccessful remapping of the lock table's shared memory
  • CORE-4498: FB 3.0 crashes when getting an explained plan for a DBKEY based retrieval
  • CORE-4480: ISQL issues warning: "Bad debug info format" when connect to database with stored function after it's restoring
June 2014
New development:
  • CORE-2303: Include plan in MON$STATEMENTS
  • CORE-4460: Expressions containing some built-in functions may be badly optimized
  • CORE-3305: "BLOB not found" error after creation/altering of the invalid trigger
May 2014
New development:
  • CORE-4437: Add support for the RETURNING clause to Embedded SQL
  • CORE-4438: Add support for UPDATE OR INSERT statement to Embedded SQL
  • Improved performance of the hash join algorithm
  • CORE-4447: Positioned UPDATE statement prohibits index usage for the subsequent cursor field references
  • CORE-4422: FB crashes when using row_number()over( PARTITION BY x) in ORDER by clause
  • CORE-4419: Server crashes while sorting records longer than 128KB
  • Fixed the restore issue with PSQL functions
  • Fixed the issue with UNION ALL vs WITH LOCK

Dmitry Yemanov
Penza, Russia
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