Avoid Unused Parameters in Procedures

WarningClean ABAP & Modern Syntax#EC NO_UNUSED_PARAMLocal Only

Overview

Avoid unused parameters in procedures.

ATC Finding Message: Parameter(s) &1 never used in procedure

Rationale

Methods, form routines, and function modules should not declare parameters that are never accessed or assigned in their implementation. Unused parameters clutter the signature, confuse callers, and may indicate incomplete implementations. If a parameter is intentionally unused, prefix its name with an underscore.

Non-Compliant

METHOD do_work IMPORTING iv_used TYPE i iv_unused TYPE string.
  DATA lv_val TYPE i.
  lv_val = iv_used.
ENDMETHOD.

Compliant

METHOD do_work IMPORTING iv_used TYPE i.
  DATA lv_val TYPE i.
  lv_val = iv_used.
ENDMETHOD.

Configuration & Thresholds

This check can be fine-tuned directly in the ATC Check Variant Editor (CHKV) in Eclipse ADT:

Parameter Name	Data Type	Default Value	Description & Guidance
CHECK_METHODS	Boolean	true	Check method procedures for unused parameters (defaults to true)
CHECK_FORMS	Boolean	true	Check form routines for unused parameters (defaults to true)
CHECK_FUNCS	Boolean	true	Check function modules for unused parameters (defaults to true)

Suppression

To suppress findings for this rule, append the pseudo-comment to the statement:

" Standard pseudo-comment:
... "#EC NO_UNUSED_PARAM

" SAP CI_ prefix format:
... "#EC CI_NO_UNUSED_PARAM

Related Rules

• Eliminate Unused Local Variables and Symbols — #EC NO_UNUSED_VARS
• Avoid Dead Code with Constant Conditions — #EC NO_DEAD_CODE

Technical Details

• Native ATC Class: ZCL_SKYLINT_NO_UNUSED_PARAM
• Implementation File: zcl_skylint_no_unused_param.clas.abap