How To Fix SDDL_PARSER_MSG198 - select * is not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 198

• Message text: select * is not allowed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDDL_PARSER_MSG198 - select * is not allowed ?

  The SAP error message SDDL_PARSER_MSG198 with the description "SELECT  is not allowed" typically occurs in the context of SAP's Data Services or when working with SQL queries in SAP systems. This error indicates that the use of the `SELECT ` statement is not permitted due to performance and security reasons.
  Cause:
  
  Performance Issues: Using SELECT * retrieves all columns from a table, which can lead to performance degradation, especially if the table has many columns or if the query is executed frequently.
  Security Concerns: Allowing SELECT * can expose sensitive data inadvertently, as it retrieves all columns, including those that may not be necessary for the operation.
  Best Practices: Many database systems and applications enforce best practices that recommend specifying only the required columns in a query.
  
  Solution:
  To resolve this error, you should modify your SQL query to explicitly specify the columns you need instead of using SELECT *. Here’s how you can do it:
  
  Identify Required Columns: Determine which columns you actually need for your operation.
  Modify the Query: Change your SQL statement from:
  SELECT * FROM your_table;
  to:
  SELECT column1, column2, column3 FROM your_table;
  Replace column1, column2, column3, etc., with the actual column names you need.
  
  
  Related Information:
  
  Performance Optimization: By selecting only the necessary columns, you can improve the performance of your queries and reduce the amount of data transferred over the network.
  Security Best Practices: Always be mindful of the data you are retrieving, especially in production environments. Limiting the columns can help mitigate risks related to data exposure.
  Documentation: Refer to the SAP documentation or the specific database documentation for guidelines on writing efficient SQL queries.
  
  If you continue to encounter issues after making these changes, consider checking the following:
  
  Ensure that the table and columns you are querying exist and are accessible.
  Review any additional constraints or rules set by your SAP environment that may affect SQL execution.
  
  By following these steps, you should be able to resolve the SDDL_PARSER_MSG198 error effectively.