OpenEdge has pretty good SQL support. Progress management I talked to did NOT want to stand behind SQL for CRUD applications. They were OK with SQL's use for ETL and were adamant that OpenEdge should be used only with 4GL for CRUD application. I wrote several blogs to explain the cool CRUD apps one could write. I did observe that 4GL devs were very shy to use anything but 4GL to work with Progress. Yes, SQL is treated as a second/third class citizen even though I felt SQL was an exceptional way to use OpenEdge with other languages. If there were valid technical reasons to not use SQL, I didn't hear it from 4GL devs or Progress management.
To be fair, 4GL and OpenEdge work very well together.
To be fair, 4GL and OpenEdge work very well together.