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data existence check for database table

Posted on Oct 15, 2005 at 06:44 AM 455 Views

Hi guys,

anybody suggest me a better & effective way of checking a database table whether data exist in it or not?

ur help appericiated...

raja

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  • Best Answer
    author's profile photo Former Member
    Former Member
    Posted on Oct 15, 2005 at 07:18 AM
    2

    Or Another way:

    tables <DBTAB>.

    select single * from <DBTAB>.

    check sy-subrc = 0.

    ....

    Svetlin

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    • Former Member Former Member
      Oct 15, 2005 at 07:58 AM

      Hi Raja

      But what do you really want to do? Do you want to check if there is a certain record or if there is at least one record?

      Anyway SELECT SINGLE works wituout condition, it should return the first record.

      But I think is better:

      Select * up to 1 rows from <table>.

      endselect .

      Than:

      Select single * from <table>.

      Max

      Message was edited by: max bianchi

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  • author's profile photo Former Member
    Former Member
    Posted on Oct 15, 2005 at 06:55 AM
    0

    There are vairious ways

    Most effective one is

    Select * up to 1 rows from <DBTAB>.

    endselect .

    If sy-subrc ne 0.

    endif .

    ( Sy-subrc will not be zero if data does not exist )

    Or

    Select count( * ) from <DBTAB>.

    If sy-subrc ne 0.

    endif.

    ( This will be slower than the first one in case table has some data ).

    Cheers.

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  • author's profile photo Former Member
    Former Member
    Posted on Oct 15, 2005 at 07:23 AM
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    Hi

    I think the best way is to do a selection withouh use of haderline.

    PARAMETERS: P_BUKRS LIKE T001-BUKRS.

    AT SELECTION-SCREEN.

    SELECT SINGLE BUKRS FROM T001 INTO P_BUKRS

    WHERE BUKRS = P_BUKRS.

    IF SY-SUBRC <> 0.

    MESSAGE E.....

    ENDIF.

    MAX

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