Check table............

[Former Member]

Hi all,

can anyone please tell me what a Check table is ?

thanks

Sabrina.

[Former Member]

Hi,

Check table is kind of a validation for entry on screens

and maintaining referential integrity of RDBMS.

These are for defining foreing keys on table fields.

For exmple EKKO-LIFNR has a check table LFA1. This means that if you enter a vendor number which does not exist in LFA1 the system will throw an error.

Cheers.

[Former Member]

Hi Sabrina

The Check Table is the table used by system to check if a data exist or not exist.

While creating a table if you want to be sure that a field can have some values and these are in a certain table, you can give IT this table as CHECK TABLE.

For example: I've created my Z-TABLE where is a field KUNNR (customer). Now I want only custemers which are in master data table KNA1 can be inserted in my Z-table.

So I assign KNA1 as check table to field KUNNR in my Z-TABLE.

However this control is active only in the screens:

nothing'll be able to prevent to insert a wrong value in my Z-TABLE in a program.

If I write:

TABLES Z-TABLE.

Z-TABLE-KUNNR = 'AAAAAAAAAAA'.

MODIFY Z-TABLE.

The system'll update Z-TABLE even if the value 'AAAAAAAAAAA' isn't in KNA1. In this case the control can't work.

But if you use the field in a screen, if user insert 'AAAAAAAAAAA' and push enter, the system'll automatically give a error message. So you can avoid to check the existence in your program, it' useless to write

SELECT SINGLE * FROM KNA1 WHERE KUNNR = <FIELD_DYNPRO>.

IF SY-SUBRC <> 0.

........

The system'll do the control for you.

Max

Message was edited by: max bianchi

[Former Member]

thanks Sanjay and Max, your answers were very helpful.

Sabrina.