Valid GROUP BY query doesn't work when combined with INSERT INTO on Oracle

Question

I\'m trying to write an INSERT INTO that does a some DISTINCT/GROUP BY work. The query runs perfectly fine as a select statement, but will not work if it\'s wrapped into an INS

Answer 1

The problem is solved by automatically changing the value of a parameter (optimizer_features_enable). This value determines the optimizer version of the base, with 11 should not give that problem.