IBM ADABAS (Adaptable DAta BAse System) Interview Questions and Answers

 

What is the difference between Null compression and default compression?

The default compression type for ADABAS is 'Normal'




compression. This compresses the data by removing trailing




spaces from alphanumeric fields, removing leading zeros and




packing numeric fields, and leaving packed fields as is.






Null Suppression is a type of compression. The field must




be designated with 'NU' for this compression to occur.




Null suppressed fields that are blank or zero only take up




one byte insted of two. If there are multiple empty fields




together they can be compressed into a one byte empty field




count.

Posted by:Richards