Example of Using Data and Key Compression

In the following program, data compression is specified for transfile but not for masterfile. For key compression, suppression of trailing spaces and of leading characters that are the same as in the previous key is specified for keys t-rec-key and m-rec-key. Suppression of repetition of duplicate keys is also turned on for m-alt-key-1 and m-alt-key-2.

$set callfh"extfh"
$set datacompress"1" 
$set keycompress"6" 
     select transfile 
         assign to ... 
         key is t-rec-key. 
$set nokeycompress
$set nodatacompress

     select masterfile 
         assign to ... 
         organization is indexed 
$set keycompress"6"
         record key is m-rec-key 

$set keycompress"7"
         alternate key is m-alt-key-1 with duplicates
         alternate key is m-alt-key-2. 
$set nokeycompress