How To Fix DDLS329 - Type & is not allowed as target type for CAST function

SAP Error Message - Details

• Message type: E = Error

• Message class: DDLS - For DDL source handling

• Message number: 329

• Message text: Type & is not allowed as target type for CAST function

Self-Explanatory Message

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To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message DDLS329 - Type & is not allowed as target type for CAST function ?

  The SAP error message DDLS329 indicates that there is an issue with the use of the CAST function in your SQL statement. Specifically, it states that the type you are trying to cast to is not allowed as a target type for the CAST function. This error typically arises when the data type you are trying to convert to is incompatible with the source data type.
  Cause
  The primary causes of this error include:
  
  
  Incompatible Data Types: You are attempting to cast a data type that cannot be converted to the target type. For example, trying to cast a string to a numeric type without proper formatting or conversion.
  
  
  Unsupported Data Types: The target type specified in the CAST function may not be supported by the database or the specific version of SAP you are using.
  
  
  Syntax Errors: There may be a syntax error in the SQL statement that is causing the database to misinterpret the CAST function.
  
  
  Solution
  To resolve the DDLS329 error, consider the following steps:
  
  
  Check Data Types: Review the data types involved in the CAST function. Ensure that the source type can be converted to the target type. Refer to the SAP documentation for valid type conversions.
  
  
  Use Compatible Types: If the target type is not compatible, choose a different target type that is compatible with the source type. For example, if you are trying to cast a string to an integer, ensure that the string contains a valid integer representation.
  
  
  Review SQL Syntax: Double-check the SQL syntax for the CAST function. The correct syntax is:
  CAST(expression AS target_type)
  Ensure that the expression and target type are correctly specified.
  
  
  Test with Simple Queries: If you are unsure about the compatibility of types, try running simpler queries with the CAST function to isolate the issue.
  
  
  Consult Documentation: Refer to the SAP documentation or the specific database documentation for details on supported data types and casting rules.
  
  
  Related Information
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context.
  Database Documentation: Review the documentation for the database you are using (e.g., HANA, MaxDB) for information on data types and casting rules.
  Community Forums: Consider searching or posting in SAP community forums for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the cause of the DDLS329 error and implement a suitable solution.