ok,thanks
This time,adding condition this way WHERE FIEL1=:F1 AND FIEL2=:F2 AND
(FIEL3=:F3 OR :F3 IS NULL) INTO .. DO ..
is causing query to be much slower ...
this WHERE FIEL1=:F1 AND FIEL2=:F2 AND (FIEL3=:F3
) INTO .. DO ..takes 0.563s
82655 fetches, 1088 marks, 1584 reads, 50 writes.
197 inserts, 98 updates, 148 deletes, 19166 index, 66 seq.Delta memory: 11536
bytes.Total execution time: 0.563s
but this takes 29.141sWHERE FIEL1=:F1 AND FIEL2=:F2 AND (FIEL3=:F3 OR :F3
IS NULL) INTO .. DO ..
1700290 fetches, 1065 marks, 3694 reads, 77 writes.198 inserts, 99 updates, 149
deletes, 29422 index, 68 seq.Delta memory: -71656 bytes.Total execution time:
29.141sScript execution finished.
in both cases :F3 is NOT NULL
thanks
From: "Dmitry Yemanov dim...@users.sourceforge.net [firebird-support]"
<firebird-support@yahoogroups.com>
To: firebird-support@yahoogroups.com
Sent: Wednesday, August 19, 2015 11:51 AM
Subject: [firebird-support] Re: MAKE 'EXECUTE STATEMENT' USE INDEX
19.08.2015 10:26, 'Mr. John' wrote:
> now index is used if I call
> SELECT * FROM MYPROC(...)
> but I use it in other procedures,no join on it just simply SELECT ..
> FROM MYPROC(...) in this case I can see in the plan :
> ...(MYPROC NATURAL)...
That' OK. In complex plans, (MY_PROC NATURAL) just means a select from a
procedure, it says nothing about actual plans inside MY_PROC.
Dmitry
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