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Former Member

dynamic where clause in loop

Posted on Jan 08, 2008 at 11:09 AM 72 Views

Hi,

I know dynamic clause works for SELECT.....

e.g.

I built where_clause using concatenate... based on when key fields are available. So sometime where_clause has: A = X-1 and B = X-2. and another time where_clause can have A = X-1 and C = X-5 and D = X-6.....

SELECT * from db into table int_tab where (where_clause)

However I use the same way to build this dynamic where_clause, then used on the loop at statement :

LOOP AT int_tab into int_line

where (where_clause)

I got syntax error : Statement Concluding with ".... (where_clause)" ended unexpectedly.

Any idea to make where clause dynamicly for LOOP?

Thanks.

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2 Answers

  • author's profile photo Former Member
    Former Member
    Posted on Jan 08, 2008 at 11:23 AM
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    Hi yi-wen,

    this is not possible since the LOOP statement wants to know the static type of the fields used in the WHERE clause.

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  • author's profile photo Siegfried Boes
    Siegfried Boes
    Posted on Jan 08, 2008 at 12:09 PM
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    You should be aware that a LOOP AT ... WHERE is not an optimized access .

    + because on a standard table there is not sort order,

    so the loop goes over the whole table and does

    something when the condition is fulfilled

    + it is optimzed for sorted tables, but only for one key!

    => so your idea must have bad performance!

    If this is not a problem, then you can solve the problem

    in the following way:

    loop at table

    if ( dynamic condition )

    endif.

    endloop.

    But maybe is dynamic condition is not necessary, but

    a some fixed if-conditions are also o.k.

    Siegfried

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    • Former Member
      Jan 08, 2008 at 03:26 PM

      Siegfried,

      Thanks for your response.

      I did try IF ( dynamic_condition).

      some logic...

      ENDIF.

      but I got syntax error : Relational operator ")" is not supported.

      Did I spill wrong?

      Note:

      the dynamic_condition will contain A-A1 = B-A1 and A-A2 = B-A2, A-A4 = B-A4...... whatever the combination when A-Ax is available.

      Thanks so much.

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