How To Fix ACM_SYNTAX079 - Comparison between numerical and character-like types not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: ACM_SYNTAX - ACM: DCL Syntax Error Messages

• Message number: 079

• Message text: Comparison between numerical and character-like types not allowed

Self-Explanatory Message

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• What is the cause and solution for SAP error message ACM_SYNTAX079 - Comparison between numerical and character-like types not allowed ?

  The SAP error message ACM_SYNTAX079 indicates that there is an attempt to compare numerical and character-like types in your ABAP code, which is not allowed. This error typically arises when you are trying to perform a comparison operation (like =, <>, <, >, etc.) between variables or fields of different data types—specifically, between a numeric type (like I, F, or P) and a character-like type (like C or N).
  Cause:
  
  Data Type Mismatch: The most common cause is that one of the operands in the comparison is a numeric type while the other is a character type.
  Implicit Type Conversion: ABAP does not automatically convert between numeric and character types for comparison, which leads to this error.
  Incorrect Variable Declaration: Sometimes, the variables may not be declared correctly, leading to type mismatches.
  
  Solution:
  To resolve this error, you need to ensure that both operands in the comparison are of the same data type. Here are some steps you can take:
  
  
  Check Data Types: Review the data types of the variables involved in the comparison. You can use the ABAP Data Dictionary or check the variable declarations in your code.
  
  
  Explicit Conversion: If you need to compare a numeric value with a character-like value, you can convert one of the values to match the other type. For example:
  
  If you are comparing a numeric variable with a character variable, convert the character variable to a numeric type using CONVERT or CAST functions.
  If you are comparing a numeric variable with a character-like variable, convert the numeric variable to a character type using CONCATENATE or WRITE statements.
  
  Example:
  DATA: lv_num TYPE i,
        lv_char TYPE c LENGTH 10.
  
  lv_num = 100.
  lv_char = '100'.
  
  " Correct comparison
  IF lv_num = lv_char.
    " Do something
  ENDIF.
  In this case, you might want to convert lv_char to a numeric type before comparison.
  
  
  Use Appropriate Functions: Use functions like CONCATENATE, WRITE, or CAST to ensure that the types match before performing the comparison.
  
  
  Debugging: If you are unsure where the error is occurring, use debugging tools to step through your code and inspect the types of the variables at runtime.
  
  
  Related Information:
  
  ABAP Data Types: Familiarize yourself with the different data types in ABAP and their characteristics.
  Type Conversion: Understand how to perform type conversions in ABAP, including implicit and explicit conversions.
  SAP Documentation: Refer to the official SAP documentation for more details on data types and error handling in ABAP.
  
  By ensuring that the data types match before performing comparisons, you can avoid the ACM_SYNTAX079 error in your ABAP programs.