How To Fix DT149 - Structure is not flat (component &) (use in DB function)

DT149 - Overview

• Message type: E = Error

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

• Message number: 149

• Message text: Structure is not flat (component &) (use in DB function)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DT149 - Structure is not flat (component &) (use in DB function) ?

  The SAP error message DT149, which states "Structure is not flat (component &) (use in DB function)," typically occurs when you are trying to use a structure that contains nested or complex data types in a database function or operation that requires a flat structure. This error is common in ABAP programming when dealing with database operations, especially when using Open SQL or when defining database views.
  
  Cause:
  
  Nested Structures: The structure you are trying to use has nested components or substructures. Database operations generally require a flat structure, meaning that all fields should be at the top level without any nested components.
  Complex Data Types: The structure may include complex data types such as tables, references, or other structures that cannot be directly mapped to a database table.
  Incompatible Data Types: Some data types may not be supported in the context of the database operation you are trying to perform.
  
  
  Solution:
  
  
  Flatten the Structure: Modify