Data Interfaces

Example: Variable Format (Generate)
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REPORT RSFFF01G.
TABLES: SFLIGHT, SBOOK.
INCLUDE RSFFF01I.
PARAMETERS:
FILE(20) DEFAULT '/tmp/RSFFF01G'
LOWER CASE.
START-OF-SELECTION.
OPEN DATASET FILE FOR OUTPUT
IN BINARY MODE.
GET SFLIGHT.
MOVE-CORRESPONDING SFLIGHT TO REC1.
MOVE 'A' TO REC1-FLAG.
TRANSFER REC1 TO FILE.
WRITE REC1-CARRID, REC1-CONNID,.......
GET SBOOK.
MOVE-CORRESPONDING SBOOK TO REC2.
MOVE 'B' TO REC2-FLAG.
TRANSFER REC2 TO FILE.
WRITE REC2-BOOKID, REC2-CUSTID,.......
END-OF-SELECTION.
CLOSE DATASET FILE.
The above example generates a sequential file with data records of different structures.
The include program is defined as follows:
DATA: BEGIN OF REC1, FLAG.
INCLUDE STRUCTURE SBC420A.
DATA: END OF REC1.
DATA: BEGIN OF REC2, FLAG.
INCLUDE STRUCTURE SBC420B.
DATA: END OF REC2.
The structure SBC420A is used for flight data, while the structure SBC420B holds reservation data.
A flag should indicate whether the next data record contains flight data or reservation data.