This 5 day class will introduce students to the skills necessary to code REXX execs in
z/OS and OS/390 environments. The student will learn to:
- Create and allocate REXX libraries.
- Invoke REXX execs and pass parameters to them.
- Use REXX instructions to perform terminal I/O.
- Perform arithmetic calculations and character
- Use such REXX programming constructs as: IF statements, SELECT‑WHEN constructs and DO‑WHILE and iterative DO loop sequences.
- Debug REXX execs via the TRACE facility.
- Write user‑developed REXX subroutines and
- Issue TSO commands from REXX execs.
- Trap TSO command output and process the output
in the REXX exec.
- Use ISPF services in REXX execs.
- Parse data using the PARSE statement.
- Read and write sequential datasets.
- Manipulate and access the REXX data stack.
- Create REXX‑based ISPF edit macros.
- Execute REXX execs in batch jobs.
- Write REXX execs that interact with DB2.
- Write REXX execs that issue MVS operator
- Compile and linkedit REXX execs.
A series of written and lab exercises will be used to reinforce the classroom
Programmer, technical support personnel, and other individuals that need to write REXX execs.
- Introduction to OS/390, Introduction to z/OS, or
- TSO/ISPF, or equivalent experience.
- Previous experience in designing and coding
application programs will enhance the results of this course.
Introduction to REXX
- Dataset Organization
- Methods of Execution
REXX Language Syntax
- General Statement Syntax
- Assignment Statement
- Accessing the Terminal
- SAY Statement
- PULL Statement
- ARG Statement
- IF‑THEN‑ELSE Statement
- SELECT‑WHEN Sequence
- AIterative DO Sequence
- DO‑WHILE‑END Sequence
- DO‑UNTIL Sequence
- DO FOREVER Sequence
- LEAVE Statement
- ITERATE Statement
- SIGNAL Statement
- EXIT Statement
REXX Built-in Functions
- Information Functions
- Character Functions
- Word Functions
- Data Functions
Debugging REXX Execs
- TRACE Statement
- Interactive Tracing
- Condition Traps
User‑defined Subroutines and Functions
- Defining and Using Subroutines
- Defining and Using Functions
- Internal versus External Functions
TSO/E Processing in REXX
- Using TSO Commands
- TSO/E External Functions
- SYSVAR( )
- MVSVAR( )
- MSG( )
- PROMPT( )
- SYSDSN( )
- LISTDSI( )
- OUTTRAP( )
Using ISPF Services in REXX
- BROWSE / VIEW Services
- EDIT Service
- LIBDEF Service
- DISPLAY Service
- SETMSG Service
- ADDRESS Statement
- SUBCOM Command
- PARSE Statement
- List Parsing
- String Pattern Parsing
- Positional Pattern Parsing
- Executing Programs in Execs
- ALLOC Command
- CALL Command
- FREE Command
- EXECIO Statement
Data Stack Processing
- REXX Statements to Manipulate the Stack
- Uses of the Stack in REXX Execs
- TSO Commands That Use the Stack
ISPF Edit Macros
- Edit Macro Commands
- Using Edit Primary Commands
- Using Edit Line Commands
- Using Edit Macro Keyphrases
- Using Edit Labels
Batch REXX Execution
- Executing REXX Execs in TSO Background Jobs
- Executing REXX Execs in Batch Jobs
Supplemental Topics (as time permits)
- REXX Language Support in DB2
- REXX Support for MVS Operator Commands
- Compiling REXX Execs
To Hire a proven z/OS REXX Subject Matter Expert Consultant and Instructor that teaches this class, call 800-798-3901 today!