Data Statement

A data statement is used with a function statement, or with a function statement and a detail statement. It contains a logical record used as replacement data for an existing logical record, or new data to be incorporated in the output master data set.

Each data statement contains one logical record, which begins in the first column of the data statement. The length of the logical record is equal to the logical record length (LRECL) specified for the output master data set. Each logical record contains a sequence number to determine where the data is placed in the output master data set (except when INSERT=YES is specified on a NUMBER statement).

When used with a CHANGE function statement, a data statement contains new or replacement data, as follows:

If the sequence number in the data statement is identical to a sequence number in an existing logical record, the data statement replaces the existing logical record in the output master data set.
If no corresponding sequence number is found within the existing records, the data statement is inserted in the proper collating sequence within the output master data set. (For proper execution of this function, all records in the old master data set must have a sequence number.)
If a data statement with a sequence number is used and INSERT=YES was specified, the insert operation is stopped. IEBUPDTE will continue processing if this sequence number is at least equal to the next old master record (record following the referred to sequence record).

When used with an ADD or REPL function statement, a data statement contains new data to be placed in the output master data set.

Sequence numbers within the old master data set are assumed to be in ascending order. No validity checking of sequence numbers is performed for data statements or existing records.

Sequence numbers in data statements must be in the same relative position as sequence numbers in existing logical records. (Sequence numbers include leading zeros and are assumed to be in columns 73 through 80; if the numbers are in columns other than these, the length and relative position must be specified in a SEQFLD parameter within a preceding function statement.)