How To Fix SDDL_PARSER_MSG193 - Table name "&1" is defined more than once in on clause

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 193

• Message text: Table name "&1" is defined more than once in on clause

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDDL_PARSER_MSG193 - Table name "&1" is defined more than once in on clause ?

  The SAP error message SDDL_PARSER_MSG193 indicates that there is a problem with the definition of a table in a SQL query, specifically in the ON clause of a join operation. The error message states that the table name is defined more than once, which can lead to ambiguity in the query execution.
  Cause:
  This error typically occurs when:
  
  A table is referenced multiple times in the ON clause of a join without proper aliasing.
  There is a mistake in the SQL syntax where the same table is inadvertently included more than once.
  The query is trying to join the same table multiple times without using different aliases for each instance.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check the SQL Query: Review the SQL query that is causing the error. Look specifically at the ON clause to identify where the same table is being referenced multiple times.
  
  
  Use Aliases: If you need to join the same table multiple times, use table aliases to differentiate between the instances. For example:
  SELECT *
  FROM table1 AS t1
  JOIN table2 AS t2 ON t1.id = t2.foreign_id
  JOIN table1 AS t3 ON t2.id = t3.foreign_id
  In this example, table1 is referenced twice but with different aliases (t1 and t3).
  
  
  Remove Redundant References: If the duplicate reference is not necessary, remove the redundant table reference from the ON clause.
  
  
  Validate the Logic: Ensure that the logic of your joins is correct and that you are not unintentionally creating circular references or ambiguous joins.
  
  
  Related Information:
  
  SQL Syntax: Familiarize yourself with SQL syntax, especially regarding joins and the use of aliases.
  SAP Documentation: Refer to SAP's official documentation for more details on SQL queries and error handling.
  Debugging Tools: Use debugging tools available in SAP to trace the execution of your SQL queries and identify where the error is occurring.
  
  By following these steps, you should be able to resolve the SDDL_PARSER_MSG193 error and ensure that your SQL queries execute correctly.