Generated DDL SQL views are only supported in limited way by SE11

Message type: E = Error

Message number: 340

Message text: Generated DDL SQL views are only supported in limited way by SE11

What causes this issue?

DDL SQL views are generated objects that are created from ABAP DDL
source code. Direct changes to generated DDL SQL views are not possible
with SE11 (Dictionary View Editor). In SE11, all change functions are
deactivated for DDL SQL views.
The display of generated DDL SQL views is supported in SE11 to a limited
degree only. This applies particularly to SQL features that are not
within the function range of SE11 but canbe used in ABAP DDL source
code. Examples include UNION, UNION ALL, LEFT OUTER JOIN. The displayed
information on generated DDL SQL views is possibly incomplete or unclear
for these features.

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

System Response

How to fix this error?

Use the editor for ABAP DDL source code (part of the ABAP development
tools in Eclipse) in order to change DDL source code. These changes are
propagated to the generated DDL SQL view when the DDL source code is
activated.