How To Fix DT345 - A proxy view is not allowed with a global temporary table

SAP Error Message - Details

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 345

• Message text: A proxy view is not allowed with a global temporary table

What causes this issue?

No data should be written to tables with a proxy view. This is checked
in OpenSQL at runtime. However, a global temporary table is created for
this very purpose.

System Response

The table will not be activated or checked successfully.

How to fix this error?

Remove the proxy view or define a transparent table instead of a global
temporary table.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DT345 - A proxy view is not allowed with a global temporary table ?

  The SAP error message DT345, which states "A proxy view is not allowed with a global temporary table," typically occurs in the context of SAP HANA when you are trying to create or use a proxy view that references a global temporary table. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Proxy Views: A proxy view in SAP HANA is a type of view that allows you to access data from a remote source or a different schema. It acts as a bridge to the underlying data.
  Global Temporary Tables: These are tables that store data temporarily for the duration of a session or transaction. They are not intended to be used in conjunction with proxy views because of the way they manage data visibility and lifecycle.
  Incompatibility: The error arises because the architecture of proxy views does not support the dynamic nature of global temporary tables, which can lead to inconsistencies and unexpected behavior.
  
  Solutions:
  
  Avoid Using Global Temporary Tables: If possible, refactor your design to avoid using global temporary tables in conjunction with proxy views. Instead, consider using regular tables or other types of views that are compatible.
  Use Local Temporary Tables: If you need temporary storage, consider using local temporary tables that are session-specific and do not conflict with the proxy view requirements.
  Redesign the Data Flow: Analyze the data flow and see if you can redesign the process to eliminate the need for a proxy view that references a global temporary table.
  Check for Alternatives: If you are using a proxy view to access data from another schema or database, explore other methods of data access that do not involve temporary tables.
  
  Related Information:
  
  SAP HANA Documentation: Review the official SAP HANA documentation for more details on proxy views and global temporary tables. This can provide insights into best practices and design patterns.
  Performance Considerations: Understand the performance implications of using temporary tables versus permanent tables, especially in a high-concurrency environment.
  Error Handling: Implement error handling in your SQL scripts or application logic to gracefully manage situations where this error might occur.
  
  By addressing the underlying design issues and avoiding the use of incompatible structures, you can resolve the DT345 error and ensure smoother operation of your SAP HANA environment.