How To Fix DBMAN114 - You are executing a nested query. This is not possible.

SAP Error Message - Details

• Message type: E = Error

• Message class: DBMAN - Data Manager Message Class

• Message number: 114

• Message text: You are executing a nested query. This is not possible.

What causes this issue?

You have executed a query that clashes with the internal status of a
previous query, as it is still running. This can be due to the following
reasons:
<ZK>Cause 1:</> You are executing a query on a VirtualProvider. This
VirtualProvider is based on a function module that reads data from
InfoCube &v1& . This would cause to the query to be overwritten on the
VirtualProvider. The system therefore terminated the action.
<ZK>Cause 2:</> The previous query has been terminated, due to problems
in currency translation for example. The connection to the front end was
not broken after this. In this case, this message arises from the
original error.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

At the moment, the BI Data Manager does not allow you to execute nested
queries in the same role area. The following workarounds can be used for
these causes:
<ZK>Cause 1: </>A possible workaround is to run the query on InfoCube
&v1& in its own role area. The RFC-enabled read module
RSDRI_INFOPROV_READ_RFC can be called using an asynchronous RFC call
("STARTING NEW TASK ..."). This query is then executed in its own role
area, thus preventing a conflict with the status information.
<ZK>Cause 2:</> Reset the connection between your front end and the BW
server. Then solve the original problem that caused this message to
appear.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DBMAN114 - You are executing a nested query. This is not possible. ?

  The SAP error message DBMAN114 indicates that you are attempting to execute a nested query, which is not supported in the context you are working in. This error typically arises when you are trying to run a subquery within another query in a way that the database or the specific SAP environment does not allow.
  Cause:
  
  Nested Queries: The primary cause of this error is the use of nested SQL queries (subqueries) in a context where they are not permitted. This can happen in certain database systems or specific configurations of SAP.
  Database Limitations: Some databases have restrictions on the use of nested queries, especially in certain types of operations or when using specific SQL commands.
  Incorrect SQL Syntax: The SQL syntax may not be correctly structured, leading to the database interpreting it as a nested query.
  
  Solution:
  
  
  Rewrite the Query: Instead of using a nested query, try to rewrite your SQL statement using joins or temporary tables. This often resolves the issue by flattening the query structure.
  
  For example, if you have:
  SELECT * FROM table1 WHERE column1 IN (SELECT column2 FROM table2);
  You can rewrite it using a join:
  SELECT t1.* FROM table1 t1 JOIN table2 t2 ON t1.column1 = t2.column2;
  
  
  
  
  Check Database Documentation: Review the documentation for the specific database you are using with SAP to understand its limitations regarding nested queries.
  
  
  Use Views: If the logic of your nested query is complex, consider creating a view that encapsulates the logic and then querying that view instead.
  
  
  SAP Notes and Support: Check SAP Notes for any specific guidance or patches related to this error. Sometimes, there may be known issues or updates that can help resolve the problem.
  
  
  Consult with Database Administrator: If you are unsure about how to modify your query or if the issue persists, consult with your database administrator or a colleague with SQL expertise.
  
  
  Related Information:
  
  SQL Best Practices: Familiarize yourself with SQL best practices, especially regarding query optimization and structuring queries without nesting.
  SAP Documentation: Refer to SAP's official documentation for guidance on SQL queries and database interactions.
  Performance Considerations: Be aware that rewriting queries can also improve performance, as nested queries can sometimes lead to inefficient execution plans.
  
  By following these steps, you should be able to resolve the DBMAN114 error and successfully execute your queries in SAP.