Using user defined function in where clause

Hi,
I have defined function to get maximum date before passed date on the table 'A' and I'm using the same function to get details on that date from the same table 'A' in where clause.
for ex:
SELECT x,y,z
FROM A
WHREE a.date = max_date;
But on one database instance it is running fine and on other it is going in a infinite loop.
Pls help me out
Thanks in advance,
Prashant

Hello Siva,
sorry, but I don't understand your reply:
This is not right forum to posting this question.
You are from which module or working any 3rd party application.
MaxDB 7.7.07.16 is the community version of MaxDb,
we are not using it for SAP
and no 3rd party software is required to reproduce my problem,
Sql Studio or Database Studio will do.
Regards,
Silke Arnswald

Similar Messages

  • Strange errors when using user defined function in where clause

    Hello,
    I am having trouble with a function that, when used in the where clause of a select will cause an error if the first column selected is of type INTEGER. Not sure whether I am doing something wrong or whether this is a bug.
    Here is a very simple test case:
    create table test(
    col1 integer not null,
    col2 varchar(20) ascii default ''
    insert into test values(1,'2011-03-15 05:00:00')
    insert into test values(2,'2011-03-15 07:00:00')
    CREATE FUNCTION BTR_TAG  RETURNS VARCHAR AS
        VAR ret VARCHAR(20);
      SET ret='2011-03-15 06:00:00';
      RETURN ret;
    Select * from test where col2 >= BTR_TAG()
    Select col1,col2 from test where col2 >= BTR_TAG()
    =>  Error in assignment;-3016 POS(1) Invalid numeric constant
    Select '',* from test where col2 >= BTR_TAG()
    Select col2,col1 from test where col2 >= BTR_TAG()
    => works as it should
    MaxDB V 7.7.07.16 running on Windows Server 2003
    I can replicated the test case above with Sql Studio and other ODBC based tools.
    Thanks in advance,
    Silke Arnswald

    Hello Siva,
    sorry, but I don't understand your reply:
    This is not right forum to posting this question.
    You are from which module or working any 3rd party application.
    MaxDB 7.7.07.16 is the community version of MaxDb,
    we are not using it for SAP
    and no 3rd party software is required to reproduce my problem,
    Sql Studio or Database Studio will do.
    Regards,
    Silke Arnswald

  • User Defined function in Where clause

    DB:- 11.2
    Input:- 'ACCOUNTING,SALES'
    Output:- ('ACCOUNTING','SALES')
    WITH T AS (select 'ACCOUNTING,SALES' str from dual)
    select '('||regexp_replace(str,'([[:alpha:]]+)','''\1''')||')' from t /*this works*/I've created a function to use this in a where clause
    create or replace function ss(dname varchar2)
    return varchar2 is
    begin
      RETURN '('||regexp_replace(dname,'([[:alpha:]]+)','''\1''')||')';
    end; 
    select ss('ACCOUNTING,SALES') from dual --this worksBut when I am using this function in a where clause result is not coming..any thing i am missing?
    select * from dept where dname in ss('ACCOUNTING,SALES') --no rows

    940838 wrote:
    Output:- ('ACCOUNTING','SALES')Wrong. ('ACCOUNTING','SALES') is a list of two strings 'ACCOUNTING' and 'SALES' while your function returns a single string '(''ACCOUNTING'',''SALES'')'.
    IN clause requires a comma-separated list of values while your function, again, returns just one value. So query is comparing 'SALES' whith '(''ACCOUNTING'',''SALES'')', not with ('ACCOUNTING','SALES') and obviously no match. What you are trying to do is called dynamic SQL. There are plenty examples on how to use it. But you don't need it. Use nested table or varray. I'll use Oracle supplied varray type sys.OdciVarchar2List:
    select  *
      from  dept
      where dname in (
                      select  *
                        from  table(sys.OdciVarchar2List('ACCOUNTING','SALES'))
        DEPTNO DNAME          LOC
            10 ACCOUNTING     NEW YORK
            30 SALES          CHICAGO
    SQL>SY.

  • User defined function in where IN clause

    Hi,
    I have a Function who returns in priview:
    (1,2,3,4)
    Now i am using this function in SQL where clause
    Select from debug where id in debug.debug_process()
    On execute select i am getiing ORA-01722 invalid number , i understand that functions return not only numbers but  character symbols too '(,)'
    Are it posible to use user defined function who do not return NUMBER in Where clause IN statement ?  If not what tips can sugest me for getting list of values for use in IN Clause?
    ID.
    Thanks!

    Hi,
    Please try:
    You can use SYS REFCURSOR for return your data.
    create or replace function get_debug return sys_refcursor is
         v_rc sys_refcursor;
       begin
         open v_rc for 'select * from debug where id in '|| debug.debug_process();
         return v_rc;
       end;
    Function created.
    Now, if we look at using this through SQL*Plus we first create ourselves a ref cursor variable to accept the results of the function, and then call the function to get the ref cursor back..
    SQL> var rc refcursor
    SQL> exec :rc := get_debug ;
    SQL> print rc;
    Regards
    Mahir M. Quluzade

  • Using User Defined Function is SQL

    Hi
    I did the following test to see how expensive it is to use user defined functions in SQL queries, and found that it is really expensive.
    Calling SQRT in SQL costs less than calling a dummy function that just returns
    the parameter value; this has to do with context switchings, but how can we have
    a decent performance compared to Oracle provided functions?
    Any comments are welcome, specially regarding the performance of UDF in sql
    and for solutions.
    create or replace function f(i in number) return number is
    begin
      return i;
    end;
    declare
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      l_elapsed number;
      n number;
    begin
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        into l_start
        from dual;
      for i in 1 .. 20 loop
        select max(rownum)
          into n
          from t_tdz12_a0090;
      end loop;
      select to_char(sysdate, 'sssssss') - l_start
        into l_elapsed
        from dual;
      dbms_output.put_line('first: '||l_elapsed);
      select to_char(sysdate, 'sssssss')
        into l_start
        from dual;
      for i in 1 .. 20 loop
        select max(sqrt(rownum))
          into n
          from t_tdz12_a0090;
      end loop;
      select to_char(sysdate, 'sssssss') - l_start
        into l_elapsed
        from dual;
      dbms_output.put_line('second: '||l_elapsed);
      select to_char(sysdate, 'sssssss')
        into l_start
        from dual;
      for i in 1 .. 20 loop
        select max(f(rownum))
          into n
          from t_tdz12_a0090;
      end loop;
      select to_char(sysdate, 'sssssss') - l_start
        into l_elapsed
        from dual;
      dbms_output.put_line('third: '||l_elapsed);
    end;
    Results:
       first: 303
       second: 1051
       third: 1515
    Kind regards
    Taoufik

    I find that inline SQL is bad for performance but
    good to simplify SQL. I keep thinking that it should
    be possible somehow to use a function to improve
    performance but have never seen that happen.inline SQL is only bad for performance if the database design (table structure, indexes etc.) is poor or the way the SQL is written is poor.
    Context switching between SQL and PL/SQL for a User defined function is definitely a way to slow down performance.
    Obviously built-in Oracle functions are going to be quicker than User-defined functions because they are written into the SQL and PL/SQL engines and are optimized for the internals of those engines.
    There are a few things you can do to improve function
    performance, shaving microseconds off execution time.
    Consider using the NOCOPY hints for your parameters
    to use pointers instead of copying values. NOCOPY
    is a hint rather than a directive so it may or may
    not work. Optimize any SQL in the called function.
    Don't do anything in loops that does not have to be
    done inside a loop.Well, yes, but it's even better to keep all processing in SQL where possible and only resort to PL/SQL when absolutely necessary.
    The on-line documentation has suggested that using a
    DETERMINISTIC function can improve performance but I
    have not been able to demonstrate this and there are
    notes in Metalink suggesting that this does not
    happen. My experience is that DETERMINISTIC
    functions always get executed. There's supposed to
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    You can use DBMS_PROFILER to get run-time statistics
    for each line of your function as it is executed to
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  • Using round off function in where clause

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    When you post any formatted text on this site, type these 6 characters:
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  • How to use a user defined function in where cluase condition

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  • How to resolve the error while using user defined function.

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    <bean>com.bea.wlevs.example.FunctionCEP.TestFunction</bean>
    Best Regards,
    Sandeep

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