How to check date type is initial

there is SQL sentence.
DATA: BEGIN OF it OCCURS 0,
matnr LIKE mara-matnr,
laeda LIKE mara-laeda,
END OF it.
select matnr laeda
from mara
where laeda <> space.
How can I check the laead field is initial.
Regards.

Hi,
Try this syntax
SELECT... WHERE s IS [NOT] NULL...
SELECT matnr laeda FROM mara INTOTABLE it_itab WHERE
laeda IS [NOT] NULL.
Regards
Bala Krishna

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How to check data type of the field symbol at run time

Hi,
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check this ...
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Hi,
Thanks frank.
I already check this link before posting this so if you have any other link then kindly reply.
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thank you very much for the great help!!

I don't have time to read thru all your code, but I hope this information will help you.
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Hi,
I wonder how I best check for a date against a fixed date.
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Any help would be greatly appreciated. Thanks.
regards,
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I have extracted the below info from a document that i have with me. Do provide your mail-id if you need the document. I dont mind sharing...:)
Please check this for more understanding...
<b>Type Checks and Type Compatibility</b>
For historical reasons, the types of field symbols and parameters in subroutines or function modules can be defined with the STRUCTURE addition.
If the types of field symbols are defined with FIELD-SYMBOLS <f> STRUCTURE s DEFAULT wa and they are later assigned a data object wa with ASSIGN wa TO <f> ... , in a NUP both statements are checked to see if wa is at least as long as s and wa satisfies the alignment requirements of s at runtime.
16
If parameter types in function modules or subroutines are defined with FORM form1 USING/CHANGING arg STRUCTURE s ... or FORM form2 TABLES itab_a STRUCTURE s ... and the parameters are passed actual parameters with PERFORM form1 USING/CHANGING wa or PERFORM form2 USING/CHANGING itab_b, the NUP also only checks if wa or the line type of itab_b is at least as long as s and wa or the line type of itab_b satisfies the alignment requirements of s. The same is true for function module parameters whose types are defined with STRUCTURE.
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2. If wa is a single field, only the character-types C, N, D or T are allowed and the structure s must be purely character-type.
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If the type of an argument in a function module was defined with ... LIKE struc, where struc is a flat structure, the NUP only checks if the argument is a flat structure with the same length when the parameters are passed. In the UP, it also checks that the fragment views of the current and formal parameters are the same. For performance reasons, it is again recommended that you use TYPE to assign types.
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How to check date type is initial

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