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what is the difference between Null compression and default
compression?
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Answer / robert gosling
Default compression deletes trailing blanks in alphanumeric
fields and leading zeros in numeric fields.
Null suppression (NU) differs from default compression in
that searches, on descriptor fields defined with null
suppression, do not return records in which the descriptor
field is empty.
| Is This Answer Correct ? | 18 Yes | 1 No |
Answer / prashanth
Null compression - Compress Null values
default Compression - Compress a specific(default) system
value instead of NULL value.
DEFAULT < value> specifies a default value in place of a
NULL.
| Is This Answer Correct ? | 3 Yes | 0 No |
Answer / kayah jutmai
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.
| Is This Answer Correct ? | 10 Yes | 8 No |
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