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BB203AC CLP

The provided document is a CLP (Control Language Program) for an IBM System i (AS/400) environment, named BB203AC. This program is called from the main OCL script (BB203.ocl36.txt) and is responsible for deleting a work file in the QTEMP library. Below, I’ll explain the process steps, business rules, tables used, and external programs called.

Process Steps of the BB203AC CLP Program

The BB203AC program performs a straightforward task: it deletes a temporary work file in the QTEMP library. Here’s a step-by-step breakdown of the process:

  1. Program Declaration and Parameter Input:
  2. PGM PARM(&P$FGRP)
    • The program accepts a single parameter, &P$FGRP, which is a 1-character value (likely a company code or identifier, matching the ?9? placeholder in the OCL script).
  3. DCL VAR(&P$FGRP) TYPE(*CHAR) LEN(1)
    • Declares the input parameter &P$FGRP as a 1-character string.

  4. DCL VAR(&BB203W) TYPE(*CHAR) LEN(8)

    • Declares a variable &BB203W to hold the dynamically constructed file name (up to 8 characters).

  5. Construct File Name:

  6. CHGVAR VAR(&BB203W) VALUE(&P$FGRP *CAT 'BB203W')

    • Concatenates the input parameter &P$FGRP with the string 'BB203W' to form the file name. For example, if &P$FGRP is 'X', the resulting &BB203W is 'XBB203W'.
    • This step dynamically names the work file based on the input parameter.

  7. Delete Work File:

  8. DLTF FILE(QTEMP/BB203W)
    • Attempts to delete the file named BB203W from the QTEMP library. Note that the command uses a hardcoded name BB203W, not the dynamically constructed &BB203W. This appears to be a discrepancy or assumption that the file is always named BB203W in QTEMP.

  9. MONMSG MSGID(CPF2105)

    • Monitors for the message CPF2105 (indicating the file was not found). If this error occurs, the program ignores it and continues, preventing the job from failing if the file doesn’t exist.

  10. Program Termination:

  11. ENDPGM
    • Ends the program after attempting the file deletion.

Business Rules

The BB203AC program enforces the following business rules: - Purpose: The program is designed to clean up by deleting a temporary work file (BB203W) in the QTEMP library, likely to ensure no residual data from a previous run interferes with the current process. - Dynamic File Naming: The program constructs a file name using the input parameter (&P$FGRP), but the actual deletion uses a static name (BB203W). This suggests the program assumes the file in QTEMP is always named BB203W, possibly indicating a mismatch or simplification in the implementation (as per the revision note JB01 about renaming the work file). - Error Handling: The program gracefully handles the case where the file does not exist (CPF2105), ensuring the process continues without interruption. This is critical to prevent job failures in automated workflows. - Scope: The program operates within the QTEMP library, which is job-specific and temporary, ensuring that the deletion does not affect other jobs or persistent data.

Tables (Files) Used

The program interacts with the following file: - QTEMP/BB203W: - A temporary file in the QTEMP library, explicitly referenced in the DLTF command. - This file is likely created by the main OCL process (as seen in BB203.ocl36.txt, where BB203W is created via CRTDUPOBJ) and is intended to be deleted by BB203AC to clean up before further processing. - Note: The program constructs a variable &BB203W (e.g., XBB203W if &P$FGRP is 'X'), but the DLTF command uses the static name BB203W. This could indicate a coding oversight or an assumption that the file is always named BB203W in QTEMP.

External Programs Called

  • None:
  • The BB203AC program does not call any external programs. It performs a simple file deletion operation within its own logic.

Additional Notes

  • Revision History: The comment block mentions a revision (JB01, dated 12/03/2012) by Jan Beccari for renaming the work file. This suggests the program was modified to handle file naming, but the hardcoded BB203W in the DLTF command may not fully align with the dynamic naming in CHGVAR. This could be a potential issue if the process expects a dynamically named file (e.g., XBB203W) to be deleted.
  • Context in Main OCL: In the main OCL script (BB203.ocl36.txt), BB203AC is called before creating a new BB203W file in QTEMP. This indicates that BB203AC is used to ensure no leftover BB203W file exists from a previous run, providing a clean slate for the new temporary file.
  • Potential Issue: The discrepancy between the dynamically constructed &BB203W (e.g., XBB203W) and the hardcoded QTEMP/BB203W in the DLTF command could lead to the wrong file being deleted or no deletion occurring if the file name doesn’t match. This should be reviewed for consistency with the main OCL process.

Summary

The BB203AC CLP program is a utility program called by the main BB203 OCL script to delete a temporary work file (BB203W) in the QTEMP library. It: - Accepts a 1-character parameter (&P$FGRP) to construct a file name (though not used in deletion). - Deletes the QTEMP/BB203W file, ignoring errors if the file doesn’t exist. - Enforces a cleanup rule to ensure no residual temporary files remain before the main process creates a new one.

Tables Used: QTEMP/BB203W (temporary work file). External Programs Called: None.