21 lines
471 B
Plaintext
21 lines
471 B
Plaintext
When storing numeric fields, using an odd number of digits allows the sign to be included in the storage area without wasting any space.
|
|
|
|
For example the number -1234567, when packed as 7 digits is stored as follows.
|
|
|
|
----
|
|
1357
|
|
246-
|
|
----
|
|
thus taking up only 4 data slots. but when packed as 8 characters it uses 5 data slots
|
|
|
|
----
|
|
02467
|
|
0135-
|
|
----
|
|
or when 7 digits, non-packed, it will be stored as 8 data slots, including the sign.
|
|
|
|
----
|
|
FFFFFFF6
|
|
12345670
|
|
----
|