Summary -

In this topic, we described about the OMIT: Writing constants with detailed example.

There are different formats to specify strings, hexadecimal strings, and decimal numbers in DFSORT. The formats for writing character strings, hexadecimal strings, and decimalnumbers are shown below.

Type Format
Character strings The format for writing a character string is: C’x...x’ where x is an EBCDIC character.
Hexadecimal strings The format for writing a hexadecimal string is: X’yy...yy’ where yyis a pair of hexadecimal digits.
Decimal numbers The format for writing a decimal number is: n...n or ±n...n where n is a decimal digit.

Syntax -

OMIT COND=(Field1 starting position, Field1 Length, 
	Field1 format, Relational Operator, constant)

nameDescription
Field1 starting positionStarting position of field1 to be compared
Field1 LengthLength of the field1 to be compared
Field1 format_typeFormat of the field1 like CH, PD, BI etc,.
Relation operatorRelational operators like GT, EQ, NE, LT etc,.

EQ 		Equal to
NE 		Not equal to
GT 		Greater than
GE 		Greater than or equal to
LT 		Less than
LE 		Less than or equal to
ConstantSpecifies the constant to be compared

Example -

From the below data, filter the records not having name Srinivas. The NAME starts from 11th and ends at 28th column in the file.

Input: MTH.SORT.INPUT

----+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
********************************* Top of Data **********************************
00002     Srinivas            Employee                                             
test      test                test
00001     pawan kumar         student                                              
******************************** Bottom of Data ********************************

Input Record Layout -

01 INPUT-REC.
	05 ID			PIC X(05).
	05 FILLER		PIC X(05).
	05 NAME			PIC X(15).
	05 FILLER		PIC X(05).
	05 OCCUPATION 		PIC X(10).
	05 FILLER		PIC X(40).

Job -

000100 //Jobcard
000400 //**********************************************************************
000500 //*                                                                     
000510 //* SORT TO WRITE CHARACTERS/NUMERIC IN OMIT CONDITION               
000520 //*                                                                     
000600 //**********************************************************************
001100 //STEP01   EXEC PGM=SORT                                                
001300 //SORTIN   DD DSN=MTH.SORT.INPUT,DISP=SHR                      
001800 //SORTOUT  DD SYSOUT=*                                                  
001900 //SYSOUT   DD SYSOUT=*                                                  
002400 //SYSIN    DD *                                                         
002410      SORT FIELDS=COPY                                                   
002420      OMIT COND=(11,15,CH,EQ,C'Srinivas')        
003400 /*                                                                      
****** **************************** Bottom of Data ****************************

Output -

----+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
********************************* TOP OF DATA **********************************
test      test                test
00001     pawan kumar         student                                              
******************************** BOTTOM OF DATA ********************************

Explaining Solution -

  1. As a first step, need to get the position of the NAME in the file.
  2. The NAMEs starting from 11th and ends at 25th column as per the input record layout provided. So the length of NAME field is 15.
  3. As a Second step, need to get the type of the NAME.
  4. From the Input record layout declaration, NAME field is alpha-numeric. So the type is character (CH).
  5. Lastly, the job requirement is to ignore the data with the NAME as Srinivas. So the constant is "Srinivas".
  6. The OMIT condition for the above requirement with all the data gathered is -
    OMIT COND=(11,15,CH,EQ,C'Srinivas')
  7. The above condition specifies that ignore the records where the NAME is Srinivas and remaining records copied to output file.
  8. The output would have the records where the NAMEs are not Srinivas from 11th position.
Note! The matching text is always case sensitive and should use the same case while matching.