Lock Manager's ability to cancel wait shouldn't rely on engine internals [CORE3331]

[firebird-automations]

Submitted by: @hvlad

Jira_subtask_inward CORE3323

[firebird-automations]

Modified by: @hvlad

assignee: Vlad Khorsun [ hvlad ]

[firebird-automations]

Commented by: @hvlad

Initial implementation of improvement had no dependency on engine internals but requires changes in lock table structures which requires changing version number for lock table. It is bad for point release (2.5.1) but ok for major release (3.0). Currently another approach is investigated which requires no changes in lock table.

[firebird-automations]

Modified by: Sean Leyne (seanleyne)

summary: LM's ability to cancel wait shouldn't rely on engine internals => Lock Manager's ability to cancel wait shouldn't rely on engine internals