Sort records between header and footer (DATASORT Operator)
DATASORT operator sorts the records between header and trailer in the input file and copy them to an output file. It copies one or more header/trailer records to the output file in their original order while sorting. The first n records (header records) and/or last n records (trailer records) are kept aside while sorting, and the data records between them are sorted.
Syntax -
Sorting records skipping header and footer of 1 record each -
DATASORT FROM(indd) TO(outdd) HEADER TRAILER USING(CTL1)
OR
DATASORT FROM(indd) TO(outdd) FIRST LAST USING(CTL1)
Sorting records skipping m-lines header and n-lines footer -
DATASORT FROM(indd) TO(outdd) HEADER(m) TRAILER(n) USING(CTL1)
OR
DATASORT FROM(indd) TO(outdd) FIRST(m) LAST(n) USING(CTL1)
Sorting records skipping m-lines header and n-lines footer for variable-length VSAM file -
DATASORT FROM(indd) TO(outdd) HEADER(m) TRAILER(n) USING(CTL1) VSAMTYPE(V)
OR
DATASORT FROM(indd) TO(outdd) FIRST(m) LAST(n) USING(CTL1) VSAMTYPE(V)
Required Operands
- FROM - specifies ddname of the input file. It is mandatory when FROM operand is coded.
- TO - specifies 1 to 10 ddnames of output files. TO and USING operands can code at the same time.
- USING - specifies the first 4-characters of the ddname (xxxxCNTL) for the DFSORT control statement. XXXX name is the user-defined name. Either TO, USING, or both operands can code at the same time.
- HEADER or FIRST or HEADER(u) or FIRST(u) - Specifies the number of header record(s) that should be copied to the output file. HEADER and FIRST are equivalent to HEADER(1) and FIRST(1). u value ranges from 1 to 1000000.
- TRAILER or LAST or TRAILER(v) or FIRST(v)- Specifies the number of trailer record(s) that should be copied to the output file. TRAILER and LAST are equivalent to TRAILER(1) and LAST(1). v value ranges from 1 to 1000000.
Optional Operands
- VSAMTYPE - specifies the record format for a VSAM input file. It should be either F (fixed-length) or V (variable-length) record processing.
Example -
Scenario -Sort the employee data records (keep the header and footer as it is) based on the country code (from the 60th position of length 2) to the output file.
INPUT - MATEPK.INPUT.PSFILE1
----+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
ENO NAME TECHNOLOGY COMPANY STATE COUNTRY
========================================================================
001 PAWAN MAINFRAME JPM AP IN
003 SRIDHAR SAS CG OR US
004 VENKATESH ABAP CSC CA US
006 PRASAD HR INFOSYS MI US
002 SRINIVAS TESTING ORACLE TG IN
005 RAVI HADOOP CTS FL US
007 RAJA TESTING IBM CA US
========================================================================
TOTAL NUMBER OF RECORDS: 007
JCL -
----+----1----+----2----+----3----+----4----+----5----+
...
//STEP01 EXEC PGM=ICETOOL
//INDD DD DSN=MATEPK.INPUT.PSFILE1,DISP=SHR
//OUTDD DD DSN=MATEPK.OUTPUT.PSFILE1,
// DISP=(NEW,CATLG,DELETE),VOLUME=SER=DEVHD4,
// SPACE=(TRK,(1,1),RLSE),UNIT=SYSDA,
// DCB=(DSORG=PS,RECFM=FB,LRECL=80,BLKSIZE=800)
//TOOLIN DD *
DATASORT FROM(INDD) TO(OUTDD) HEADER(2) TRAILER(2) USING(CTL1)
/*
//CTL1CNTL DD *
SORT FIELDS=(60,2,CH,A)
/*
...
OUTPUT - MATEPK.OUTPUT.PSFILE1
----+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
ENO NAME TECHNOLOGY COMPANY STATE COUNTRY
========================================================================
001 PAWAN MAINFRAME JPM AP IN
002 SRINIVAS TESTING ORACLE TG IN
003 SRIDHAR SAS CG OR US
004 VENKATESH ABAP CSC CA US
005 RAVI HADOOP CTS FL US
006 PRASAD HR INFOSYS MI US
007 RAJA TESTING IBM CA US
========================================================================
TOTAL NUMBER OF RECORDS: 007