Interruption of 'heavy query' leads to 0 ms (zero duration) in it`s statistics in trace log [CORE3845]

[firebird-automations]

Submitted by: @pavel-zotov

session #⁠1

C:\1INSTALL\FIREBIRD\Data>isql localhost/3050:C:\1INSTALL\FIREBIRD\Data\T1.fdb -n
Database: localhost/3050:C:\1INSTALL\FIREBIRD\Data\T1.fdb
SQL>

session #⁠2

C:\1INSTALL\FIREBIRD\Data>isql localhost/3050:C:\1INSTALL\FIREBIRD\Data\T1.fdb -n
Database: localhost/3050:C:\1INSTALL\FIREBIRD\Data\T1.fdb
SQL> select count(*) from rdb$fields,rdb$fields,rdb$fields,rdb$fields,rdb$fields,rdb$fields; -- this query will runs enough time for we can switch to session #⁠1

session #⁠1

SQL> delete from mon$attachments where mon$attachment_id<>current_connection; commit;

session #⁠2

<< has been immediatelly interrupted >>

Trace:
#⁠#⁠#⁠#⁠#⁠

2012-05-11T23:45:04.1250 (580:0202B970) EXECUTE_STATEMENT_FINISH

C:\\1INSTALL\\FIREBIRD\\DATA\\T1\.FDB \(ATT\_7, SYSDBA:NONE, NONE, TCPv4:127\.0\.0\.1\)

C:\\1INSTALL\\FIREBIRD\\FB\_2\_5\\bin\\isql\.exe:1672

	\(TRA\_16, CONCURRENCY \| WAIT \| READ\_WRITE\)

Statement 257:

-------------------------------------------------------------------------------

select count(*) from rdb$fields,rdb$fields,rdb$fields,rdb$fields,rdb$fields,rdb$fields

0 records fetched

  0 ms, 1 read\(s\), 37969951 fetch\(es\) \-\- <<<<<<<<<  why 0 ms  here ??? <<<<<<<<<<<<<<<<<<<<

Table Natural Index Update Insert Delete Backout Purge Expunge

***************************************************************************************************************

RDB$FIELDS 18446943

Commits: 8542319 3a6a7e1

[firebird-automations]

Modified by: @hvlad

priority: Major [ 3 ] => Minor [ 4 ]

Version: 2.5.0 [ 10221 ]

assignee: Vlad Khorsun [ hvlad ]

[firebird-automations]

Commented by: @hvlad

The bug is in the engine itself, not in the utility

[firebird-automations]

Modified by: @hvlad

Component: Engine [ 10000 ]

Component: TRACEMGR [ 10140 ] =>

[firebird-automations]

Modified by: @hvlad

status: Open [ 1 ] => Resolved [ 5 ]

resolution: Fixed [ 1 ]

Fix Version: 2.5.2 [ 10450 ]

Fix Version: 3.0 Alpha 1 [ 10331 ]

[firebird-automations]

Modified by: @pcisar

status: Resolved [ 5 ] => Closed [ 6 ]

[firebird-automations]

Modified by: @pavel-zotov

status: Closed [ 6 ] => Closed [ 6 ]

QA Status: No test