How To Fix MDC_HDB_MTC082 - Class already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: MDC_HDB_MTC - Message class for master data consolidation matching

• Message number: 082

• Message text: Class already exists

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MDC_HDB_MTC082 - Class already exists ?

  The SAP error message MDC_HDB_MTC082: Class already exists typically occurs in the context of SAP HANA when you are trying to create a new class or object that already exists in the database. This can happen during various operations, such as when deploying a model or when trying to create a new database object that has the same name as an existing one.
  Cause:
  
  Duplicate Object Name: The most common cause of this error is that you are attempting to create a class (or another database object) with a name that already exists in the database schema.
  Incorrect Deployment: If you are deploying a model or application, it may be trying to create objects that have already been created in a previous deployment.
  Versioning Issues: If there are multiple versions of the same object, it may lead to conflicts during deployment or execution.
  
  Solution:
  
  Check Existing Objects: Before creating a new class, check the database schema to see if an object with the same name already exists. You can do this using SQL queries or through the SAP HANA Studio.
  SELECT * FROM _SYS_OBJECTS WHERE NAME = 'YourClassName';
  
  Rename the New Class: If you find that the class already exists and you need to create a new one, consider renaming the new class to avoid the conflict.
  Drop Existing Object: If the existing class is no longer needed, you can drop it using the following SQL command:
  DROP CLASS YourClassName;
  Caution: Ensure that dropping the class will not affect other parts of your application.
  
  Modify Deployment Scripts: If you are using deployment scripts, ensure that they check for existing objects before attempting to create new ones. This can help avoid conflicts during deployment.
  Use IF NOT EXISTS: When creating classes or objects, you can use the IF NOT EXISTS clause in your SQL statements to prevent errors if the object already exists.
  CREATE CLASS YourClassName IF NOT EXISTS;
  
  
  Related Information:
  
  SAP HANA Documentation: Refer to the official SAP HANA documentation for more details on object management and SQL syntax.
  SAP Community: Engage with the SAP Community forums for insights and solutions from other users who may have encountered similar issues.
  Error Logs: Check the SAP HANA error logs for more detailed information about the error and its context, which can help in troubleshooting.
  
  By following these steps, you should be able to resolve the MDC_HDB_MTC082: Class already exists error effectively.