Example for Changing the Set-Subset Physical Options

For this example, the original DASDL description looks as follows: 

K COMPACT DATA SET
 (
  A ALPHA(100) SIZE VARYING;
  N NUMBER(2);
  R REAL OCCURS 25 TIMES DEPENDING ON N;
 )
XTENDED = TRUE;
S SET OF K KEY IS N,
  AREAS = 20,
  AREASIZE = 10 TABLES,
  TABLESIZE = 200,
  CHECKSUM = TRUE,
SECTION = ( N = 50;  N = 100)

To update the DASDL description with new set-subset physical options, perform the following steps:

  1. Alter the DASDL statements to the following. The asterisks (*) indicate changed lines. 

    *   UPDATE;
    K COMPACT DATA SET
     (
      A ALPHA(100) SIZE VARYING;
      N NUMBER(2);
      R REAL OCCURS 25 TIMES DEPENDING ON N;
     );
    S SET OF K KEY IS N,
*     AREAS = 30,
*     AREASIZE = 15 TABLES,
*     TABLESIZE = 400,
*     CHECKSUM = FALSE;

  2. Compile the DASDL description.

  3. Generate and run the Reorganization program.

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