DFSORT Omit Substring Search

Summary -

In this topic, we described about the Omit Substring Search with detailed example.

Substring search is used to filter the records which contain the substring anywhere from the starting position and length specified.

Syntax -

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

Let’s discuss in detail.

name	Description
Field1 starting position	Starting position of field1 to be compared
Field1 Length	Length of the field1 to be compared
SS	Specifying to SORT the filtering should be done based on the Substring search.
Relation operator	Relational 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`
Substring constant	Substring constant

Example:

From the below data, filter the records not having Srinivas in the entire 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 //*******************************************************************
000600 //*                                                        
000700 //* SORT FOR STRING SEARCH IN THE FILE                      
000800 //*                                                         
000900 //*******************************************************************
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 *                                                
002401      OMIT COND=(1,80,SS,EQ,C'Srinivas')                      
002410      SORT FIELDS=COPY                                     
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:

As a first step, need to get the position NAME in the file.
As per requirement, the string can be anywhere in the file. So the starting position is file starting position and the length is the file length which is 80.
As a second step, need to get the type of the String.
From the requirement,the string is alphabetic. So the type is character (CH).
Lastly, the job requirement is to ignore the data with Srinivas. So the constant is "Srinivas".
The OMIT condition for the above requirement with all the data gathered is
```
OMIT COND=(1,80,SS,EQ,C'Srinivas') 
```
The above condition specifies that ignore the records where the string found as Srinivas. The remaining records will be copied to output file.
The output would have the records where the record not contains Srinivas anywhere in the record.