Select clause with where part is needs 600 times longer to complete

Hello.
I have two select clauses one with where, which needs 120 seconds to complete and one without where, which completes in 0,3 seconds. I want to know why is that.
120 seconds
SELECT B.* FROM
(SELECT A.OLOG, MCL_ISPROTOCOLALLOWED('LMOD', 'MCLI', A.OPRG) ALLOWED FROM (SELECT DISTINCT OLOG, OPRG FROM FLOG WHERE FIRM = '001') A) B WHERE B.ALLOWED = '1' ORDER BY OLOG;0,3 seconds
SELECT B.* FROM
(SELECT A.OLOG, MCL_ISPROTOCOLALLOWED('LMOD', 'MCLI', A.OPRG) ALLOWED FROM (SELECT DISTINCT OLOG, OPRG FROM FLOG WHERE FIRM = '001') A) B ORDER BY OLOG;Table FLOG has arround 270000 records, but only 40 of them are distinct.
IsProtocolAllowed checks if user has a permision to view the record.
Thank you for your help.
Regards,
Borut Ojcinger
Edited by: 993896 on 14.3.2013 7:24

Hi,
welcome to the forum.
Please read SQL and PL/SQL FAQ
If you have a performance issue have a look at SQL and PL/SQL FAQ
Additionally when you put some code or output please enclose it between two lines starting with {noformat}{noformat}
i.e.:
{noformat}{noformat}
SELECT ...
{noformat}{noformat}
Regards.
Al

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Issue in select query with where clause

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Hello ABAP Experts
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HI,
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>     SELECT rsnum
>            rspos
>            matnr
>            werks
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rsnum
enmng
aufnr
bye
yk

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where (('wa' is not null) and a_column in (sub-select statement)) -- fast
where (('wa' is null)) -- fast
where (('' is not null) and a_column in (sub-select statement) -- fast
or
('' is null))
where (('wa' is not null) and a_column in (sub-select statement) -- slow
or
('wa' is null))

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Dear All,
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SQL> select 1 x from dual where x = 1 ;
select 1 x from dual where x = 1
ERROR at line 1:
ORA-00904: "X": invalid identifier
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6                          FROM   DUAL)
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11 END;
12 /
PL/SQL procedure successfully completed.
SQL>Message was edited by:
Kamal Kishore

How can I pass multiple condition in where clause with the join table?

Hi:
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TD

If you are using SQL-Plus or Reports you can use lexical parameters like:
SELECT * FROM emp &condition;
When you run the query it will ask for value of condition and you can enter what every you want. Here is a really fun query:
SELECT &columns FROM &tables &condition;
But if you are using Forms. Then you have to change the condition by SET_BLOCK_PROPERTY.
Best of luck!

Select clause with where part is needs 600 times longer to complete

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