SAP Tables having NULL Entries in primary key fields

[ShwetabhNarayan]

Hi,

I am extracting data from EINA or EINE into BODS staging and the primary key field INFNR contains null on SAP ECC side.

Can anyone please tell me how and why SAP allows NULL value in a PK field.

I have encountered this in other tables also.

Thanks,

Shwetabh