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Developer's Report: Firebird Core Development & Coordination
August to November 2010

November 2010

New development
  • Researched abilities for better cardinality estimations
  • Fixed a number of v3-only regressions:
    • assertion when restoring a database having expression inside referencing non-existent UDFs
    • inability to restore privileges granted to roles
    • inability to alter the [[NOT] DETERMINISTIC] clause
    • SET TRANSACTION statement doesn't work
Bug Fixing
  • CORE-3256: Error "request depth exceeded" may appear while preparing a select query against a view with explicit plan
  • CORE-3218: Statement cancellation request might be silently ignored by the currently running SQL code
  • CORE-3217: Server crashes inside the lock manager when multiple connections are attaching/detaching simultaneously
  • CORE-3210: Error "no current record for fetch operation" in SELECT query
  • CORE-3208: Significant memory leaks with recursive queries
  • CORE-3207: Access violation inside isc_start_multiple() on begin transaction
  • CORE-3059: RemoteFileOpenAbility fails on Windows
  • Bugcheck "Too many savepoints (287)" at rollback after exception at EXECUTE BLOCK with exception handler
  • CORE-1038: Remote shadows on NT-based systems
  • Unregistered: Server crashes while shutting down the database
  • Unregistered: Server crashes while printing database pools into a file
  • Unregistered: Minor corrections in the optimizer, resolving the known regressions
  • Unregistered: More than 128 expression indices cannot be created without restarting the server
  • Unregistered: Incorrect collection of inner streams for aggregates
October 2010

New development
  • Basic network support for the fb_ping() API call
  • Fixed a few problems with PSQL functions
Bug Fixing
  • CORE-3205: isc_dsql_exec_immed2() doesn't return error codes isc_stream_eof and isc_sing_select_err
  • CORE-3203: UPDATE OR INSERT with RETURNING causes "Invalid Cursor" error
  • CORE-3202: execute_immediate API call family may crash the remote server
  • CORE-2827: Very slow prepare for complex interrelated metadata with many triggers indirectly involved in the operation being prepared
  • Unregistered (backport): Faster lookup in the security classes
  • CORE-1234 (backport): More information about table what belongs to column when checking privileges
  • Two webinars (v2.5 launch and performance testing)
September 2010

Bug Fixing
  • CORE-3137: Partial rollback is possible for a selectable procedure modifying data
  • CORE-3131: WIN1257_LV (Latvian) collation is wrong for 4 letters: A E I U
  • CORE-3003: Procedure suspend check may cause restore to fail
  • Unregistered (backport): Error in the BLR printer output
August 2010

New development
  • Fixed incomplete processing of UDF arguments, causing server crashes
Bug Fixing
  • CORE-3103: Select statement with more non indexed reads in version 2.5RC3 as in version 2.1.3
  • CORE-2822 (post-fix): Error "no current row for fetch operation" when subquery includes a non-trivial derived table
  • CORE-2155: Join of SP with view or table may fail with 'No current record for fetch operation'
  • CORE-1079 (post-fix): Every attach of fbclient/fbembed library to the host process leaks 64KB of memory
Dmitry Yemanov
Penza, Russia
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