Query Layers: Show Field Properties
On 2.9
For reference: Query Layers: View fields and field properties - Esri Community
I want to be able to see field properties in query layers.
The option is currently greyed out, meaning that I have to go back to the source table(s) to figure out (for example) if that number column is actually numbers or text. Ditto to view domains.
To prove this point, we are able to see the field properties of database views in ArcGIS Pro (2.6.8):
Query layers and database views are normally treated similarly in ArcGIS Pro. So, like you, I would have expected the Fields view to work for query layers, just like database views.
As a last-resort workaround, I suppose you could temporarily create a database view from the query layer SQL, take a look at the Fields properties of the database view, and then delete the database view. That's pretty ugly though.