Hi Vadim ,
After further investigation , we are not sure that this is a regression problem.It seems to depend on the type of query being run and the timing of hitting the stop button.
Senario: 1) If you query from a table ,which exists in your own schema and contains a lot of data .For Eg : If you stop after 0.50 sec of execution , you may be prompted by a dialog in NAV SQL editor stating that “View Results Generated So Far?”.If you press Yes here on this dialog , then the partial results will be displayed in Data grid .
Senario: 2) If you run a query for Eg : select * from all_tab_columns .Then if you hit the stop button after 0.50 sec of execution time, you may get " ORA-01013: user requested cancel of current operation" , because by the time you hit the button , it is not prepared yet the execution plan or might not retrieved any results from tables.But on the same query , if you hit stop after 1.52 sec of execution time, you will see the partial results.Could you please try to run your query with little longer and hit stop button and see how it behaves ?.
Andrew and me we tested on different versions of databases using different queries and we came to the above conclusion.Please provide us any model query , if you can. Thank you very much for your time and feedback.