Example for Changing Global Data

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

A ALPHA(20);
G GROUP
 (
  N NUMBER(3);
  F FIELD(12);
 );
P POPULATION(1000) OF D;
D DATA SET
 (
  D1 BOOLEAN;
  D2 REAL;
 );
R-D REMAPS D
 (
  D1;
  D2;
 );
S-D SET OF D KEY D2;
R-G REMAPS EX  % GLOBAL DATA REMAP
 (
  A;
  G;
  P;
 );
LDB DATABASE
 (
  R-G,
  R-D
 );

To update the DASDL with different global data, perform the following steps:

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

    *  UPDATE;
   A ALPHA(20);
   G GROUP
    (
*    X REAL;
     N NUMBER(3);
    );
   D DATA SET
    (
     D1 BOOLEAN;
     D2 REAL;
    );
   R-D REMAPS D
    (
     D1;
     D2;
    );
   S-D SET OF D KEY D2;
   R-G REMAPS EX  % GLOBAL DATA REMAP
    (
     A;
*    G GROUP
*     (
*      N;
*      F VIRTUAL FIELD(12) = 0;
*     );
*    P VIRTUAL POPULATION(1000);
    );
*  R-G-NEW REMAPS EX  % GLOBAL DATA REMAP
*   (
*    A;
*    G;
*   );
   LDB DATABASE
    (
     R-G,
     R-D
    );
*  LDB-NEW DATABASE
*   (
*    R-G = R-G-NEW,
*    R-D
*   );

  2. Compile the DASDL description.

  3. Compile the DMSUPPORT library.

  4. Generate and run the Reorganization program.

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