How To Fix SFSG_RP_MESSAGES136 - Join between &1-&2 and &3-&4 causes outer-join cycle

SAP Error Message - Details

• Message type: E = Error

• Message class: SFSG_RP_MESSAGES - Message Class for FastSearch Repository

• Message number: 136

• Message text: Join between &1-&2 and &3-&4 causes outer-join cycle

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SFSG_RP_MESSAGES136 - Join between &1-&2 and &3-&4 causes outer-join cycle ?

  The SAP error message SFSG_RP_MESSAGES136 indicates that there is an issue with a join condition in your SAP system, specifically related to an outer join cycle. This typically occurs when there is a circular reference in the join conditions between tables, which can lead to ambiguity in the result set.
  Cause:
  The error arises when the join conditions between the specified tables create a situation where the database cannot determine a clear path to retrieve the data. This can happen due to:
  
  Circular References: If Table A joins to Table B, Table B joins to Table C, and Table C joins back to Table A, it creates a cycle.
  Incorrect Join Logic: The join conditions may not be properly defined, leading to ambiguous relationships.
  Outer Joins: Using outer joins in a circular reference can exacerbate the issue, as it can lead to multiple possible paths for retrieving data.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review Join Conditions: Examine the join conditions between the tables involved. Ensure that there are no circular references. If there are, consider restructuring the joins to eliminate the cycle.
  
  
  Use Inner Joins: If possible, try to use inner joins instead of outer joins. Inner joins do not allow for null values and can help avoid cycles.
  
  
  Break the Cycle: If a cycle is unavoidable due to business logic, consider breaking the cycle by introducing a new table or view that can serve as an intermediary.
  
  
  Simplify the Query: If the query is complex, try to simplify it by breaking it down into smaller parts or using subqueries.
  
  
  Check Data Model: Ensure that the data model is designed correctly. Sometimes, the underlying data model may need adjustments to avoid such issues.
  
  
  Consult Documentation: Refer to SAP documentation or community forums for specific guidance related to your version of SAP and the tables involved.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Database Documentation: Review the database documentation for specific guidelines on join conditions and best practices.
  Performance Considerations: Be aware that complex joins can impact performance, so optimizing the query is also beneficial.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support or consulting with a database administrator who has experience with SAP systems.