2017-10-05 21:07
The TSO ISRDDN command is a useful tool that lets you browse/view your active TSO session libraries. From any session, type TSO ISRDDN and the below widow will open up. On the right sid… Read More
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Mainframe Forum - Blog about Mainframes technologies.
Contains basics of COBOL/DB2/CICS/JCL/VSAM & more.
2016-07-30 17:29
Two computer codes which are used for internal representation of data are EBCDIC and ASCII.Extended Binary coded decimal interchange(EBCDIC) code is a 8 bit character encoding st… Read More
2016-07-29 19:47
Two computer codes which are used for internal representation of data are EBCDIC and ASCII.Extended Binary coded decimal interchange(EBCDIC) code is a 8 bit character encoding st… Read More
2016-07-11 18:02
If a table column is not defined with NOT NULL, then it implies that the column value can be NULL sometimes. For such columns,if we do not use null handling technique, then the applicat… Read More
2016-06-24 18:59
If a table column in not defined with NOT NULL, then it implies that the column value can be NULL sometimes. For such columns,if we do not use null handling technique, then the application p… Read More
2016-06-15 19:16
For understanding RENT compiler option, we need to know about what is a re-entrant program.A re-entrant is a program that doesn’t change itself. “How can a program change i… Read More
2016-03-26 21:12
Very Often we use these two statements in our SQL query,ie, OPTIMIZE FOR N ROWS and FETCH FIRST N ROWS ONLY.Although it may sound similar,but both of them have specific usage when it comes t… Read More
2016-03-18 19:18
IBM provides two methods of unloading data from a DB2 table. One is DSNTIAUL program that is run under IKJEFT01 or IKJEFT1A, or 1B and the other being DSNUTILB program. DSNUTILB is a f… Read More
2016-02-20 08:21
Have you ever tried to keep a job or certain steps in a job to wait for sometime and then execute without using any scheduler ?When would it be useful to ask mainframes to sleep like this?Fe… Read More
2016-02-20 08:04
This post is just to help/guide to a new programmer in writing a cobol db2 program from scratch.Let us write a cobol program to read the EMPLOYEE table and get the details… Read More
2016-02-19 17:18
Sometimes we face job abends, or job waiting for resource owing to the fact that some datasets get into contention with some other jobs or some user is using that particular file. Most of th… Read More
2016-01-12 17:27
Suppose we have a cobol-db2 module named 'PGM-ABC'We want to bind it and run the program. But we are not sure about the package and plan details.So where do we find it from? SYSIBM tables wi… Read More
2016-01-06 18:02
This post is all about connecting DB2 from SAS in mainframe environment and using the result set for further processing. To call and connect to DB2 session we need the SQL proc to be called… Read More
2016-01-01 18:37
CA7 is a product of Computer Associates and is a scheduling tool for batch jobs in mainframe. When the number of jobs to be executed are astronomical, it is difficult to manage the jobs manu… Read More
2016-01-01 18:00
CA7 is a product of Computer Associates and is a scheduling tool for batch jobs in mainframe.When the number of jobs to be executed is huge in number and jobs need to be executed depending o… Read More
2015-12-30 17:35
We pass data from JCL to cobol program in two ways:1. Using the PARM keyword 2. Using SYSIN DD in JCLThe basic difference between these two ways of passing are as follows:A. Using 'PARM… Read More
2015-11-18 17:54
To Define Jobs in CA7:Each Job in CA7 must first be defined in its database; the easiest way to do this is through the command 'JOB'. Just type the command JOB or 'DB' in the CA7 Scheduler a… Read More
2015-11-09 17:30
I have seen the REUSE parameter in the REPRO statement using IDCAMS. Backtracking the purpose of using it, came to know several features of this keyword which i am sharing here.Some applicat… Read More
2015-09-26 05:23
Including Date field in the output file:Many a times it is required to include the date in the output file. This can be done using DATE parameter in SORT.There are 3 DATE parameter option av… Read More
2015-09-22 19:00
SEARCH is a serial search.It can be used for both sorted and unsorted data inside the table.The table needs to be defined with an index .When we use the search function, the function starts… Read More
2015-09-15 19:25
SPLIT command spits the output records one record at a time among output datasets. This happens until all the output records are written. The split happens in rotation among the datasets men… Read More
2015-09-03 18:02
The below JCL copies the VB file to FB file.//STEP01 EXEC PGM=SORT//SORTIN DD DSN=INPUTVBFILE,DISP=SHR//SORTOUT DD DSN=OUTPUTFBFILE,DISP=SHR//*//SORTWK01 DD SPACE=(CYL,10),UNIT=SYSDA//SYSOUT… Read More
2015-08-11 17:32
When Defining the cobol variables, the first thing which we see around is the USAGE clause. It only signifies how the data item will be internally stored. What will be its size.? In most ins… Read More
2015-08-10 19:13
Have you ever tried to keep a job or certain steps in a job to wait for sometime and then execute without using any scheduler ?When would it be useful to ask mainframes to sleep like this?Fe… Read More
2015-08-01 16:29
We come across certain instance when we need to get the time/date in certain formats in cobol.We all know that we can get the dates in cobol using ACCEPT verb in the following way. &nb&hell…Read More
2015-07-01 17:55
Introduction:The Storage Management Subsystem (SMS) automates the use of storage for data sets. The z/OS , system is not aware of how much space a dataset will need, where it wil… Read More
2015-06-30 20:02
1. The STORCLAS Parameter:STORCLAS is a keyword parameter. It is used to assign a data set to an SMS defined class. These parameters discused below have significance only if SMS is acti… Read More
2015-06-24 17:18
In order to maintain uniqueness in the values entered in db2, we use the UNIQUE constraint for one of the column in db 2. Creation of unique index, primary key are also there in the li… Read More
2015-06-16 18:31
Once came across a scenerio where we had to copy a vsam file to a flat file and then process the flat file in subsequent steps.This is pretty simple and can be achived with a SORT step.But O… Read More
2015-04-21 17:57
Many times we face the scenario, where we are in need to create a file suffixed with today's date ,time ,ie the system date and time. It can be done in various ways. In this post we wi… Read More
2015-04-19 20:17
COMP3 in cobol enables a computer to store 2 digits in each storage position, except for the rightmost position where the sign is stored. Each digit takes half a byte.Point to remember: &nbs&hell…Read More
2015-03-11 19:56
We all know that a PDS (partioned data set), commonly referred to as Library in Z/OS world is a collection of several data sets which we call as members. A PDS internally contains a director… Read More
2015-02-05 17:50
This JCL will copy the members of the PDS into a PS file with the help of IEBPTPCH//STEPNAME EXEC PGM=IEBPTPCH &n&hell…Read More
2015-02-03 11:20
This JCL will split the even and the odd number of records from the input file.//STEP01 EXEC PGM=SORT  &hell…Read More
2015-01-30 09:53
The CARD or the DATALINES statement is valid in the data step and is used to Read the real data values into the program. Generally while running the sas programs, we use an input file(… Read More
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