How To Fix DDVIDB059 - Function COALESCE: maximum type cannot be determined

SAP Error Message - Details

• Message type: E = Error

• Message class: DDVIDB - Database-specific parts of views

• Message number: 059

• Message text: Function COALESCE: maximum type cannot be determined

Self-Explanatory Message

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• What is the cause and solution for SAP error message DDVIDB059 - Function COALESCE: maximum type cannot be determined ?

  The SAP error message DDVIDB059 with the description "Function COALESCE: maximum type cannot be determined" typically occurs in ABAP when using the COALESCE function. This function is used to return the first non-null value from a list of arguments. The error indicates that the system is unable to determine the maximum data type among the provided arguments.
  Cause:
  The primary cause of this error is that the data types of the arguments passed to the COALESCE function are incompatible or ambiguous. For example, if you pass arguments of different types (e.g., a string and an integer), the system cannot determine a common type to return.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Ensure Consistent Data Types: Make sure that all arguments passed to the COALESCE function are of the same data type or can be implicitly converted to a common type. For example, if you are using strings and integers, convert the integers to strings before passing them to COALESCE.
  DATA: lv_string TYPE string,
        lv_integer TYPE i,
        lv_result TYPE string.
  
  lv_string = 'Hello'.
  lv_integer = 0.
  
  lv_result = COALESCE( lv_string, lv_integer + '' ).  " Convert integer to string
  
  
  Explicit Type Casting: If necessary, explicitly cast the variables to a common type before using them in the COALESCE function.
  
  
  Check for NULL Values: Ensure that the values being passed are not NULL or undefined, as this can also lead to ambiguity in type determination.
  
  
  Review Function Logic: If the COALESCE function is part of a larger expression or function, review the logic to ensure that the types align correctly throughout.
  
  
  Related Information:
  
  COALESCE Function: The COALESCE function is used in SQL and ABAP to handle NULL values effectively. It is important to understand how it works and the types of values you are working with.
  Data Type Compatibility: Familiarize yourself with ABAP data types and how they can be converted or cast to ensure compatibility.
  Debugging: Use the ABAP debugger to inspect the values and types of the variables being passed to the COALESCE function to identify any discrepancies.
  
  By ensuring that all arguments to the COALESCE function are of compatible types, you should be able to resolve the DDVIDB059 error.