The powerful data analytics system SAS isn’t just for Windows or UNIX environments—it’s fully capable of running in a mainframe environment like z/OS. In the world of mainframe computing, SAS opens up…
Author: DBZtech
CHAR and VARCHAR in COBOL
In this article, we’ll explore the differences between CHAR and VARCHAR in DB2, their storage implications, performance considerations, and how VARCHAR columns map to COBOL host variables. Understanding the CHAR Data Type…
DB2 Query to check Privilege(C/R/U/D) held by cobol programs on DB2 table
The solution is to use SYSTABAUTH table. Assume the table name is ‘DB1T04’ and we want to find out what all programs performs C(CREATE) R(READ) U(UPDATE) or D(DELETE) operation. A simple query…
Identify Connections for Cobol Programs in Z/OS using SYSPLSYSTEM
How COBOL Programs Connect to CICS, IMS & DB2 in z/OS Mainframes When COBOL applications run on an IBM z/OS mainframe, they usually operate in one of two ways: 📌 Online —…
TSO Command to identify Dataset Contention in Mainframe-ISRDDN
Most organizations have in house tools to check for dataset contention. Mostly it is a REXX code behind the tool, however, this TSO COMMAND will help to do the same task and…
Understanding COMP and COMP-5 in IBM COBOL
In IBM COBOL, the COMP (computational) data type is used to store numeric values in binary format, ideal for efficient arithmetic operations. This format requires the data to be integers, and the compiler allocates memory in…
DB2 Constraints
DB2 Constraints Constraints help to maintain data integrity without any procedural logic(like triggers, Stored procs). Writing a constraint is quite easy and has two parts to it, namely,the constraint Name & the…
COMP * Command in JCL
COMP * or COMP * x is a handy command to compare the changes made to a JCL. If this command is issued in modified JCL, it will show the old and…
Public Cloud
Public Cloud is an IT model where services and infrastructure are managed by a third-party provider and shared with multiple organizations using the public Internet. That means it offloads much of the…
Private Cloud
When Organizations uses private dedicated environments, i.e. organization is running an environment where the sole tenant is the company itself. The company is ultimately responsible for maintaining the hardware, software, and networking…
How COMP-3 Saves Space-In COBOL
Having a clear understanding of Zoned Decimal format is essential before diving into Packed Decimal (COMP-3) format in COBOL. In Packed Decimal format, each byte’s zone portion stores the next numeric digit,…
What is Zoned Decimal In COBOL
The two computer codes mostly used for internal binary representation are EBCDIC and ASCII. Mainframe uses EBCDIC coding system. In EBCDIC, each byte consists of eight bits which are subdivided into two…
Buffer Pool In DB2
In IBM Db2 databases, data is physically stored on disk across multiple files. Each file is divided into fixed-size blocks known as pages, which serve as the smallest unit of data exchange…
Catalog Tables In DB2
The word catalog signifies a list of items. When DB2 is installed, DB2 creates a set of tables which stores the information about DB2 objects as and when it gets created/updated, like…
Identity Column in DB2
This identifier is a number that is updated sequentially as new records are added. In DB2, this feature will automatically generate the values. The values for an identity column can be generated…