Auto-generated keys are not returned if they're requested by column names or indexes

org.mariadb.jdbc.Connection.prepareStatement(String sql, int columnIndexes[]) and prepareStatement(String sql, String columnNames[]) call prepareStatement(sql), which in turn calls prepareInternal() with Statement.NO_GENERATED_KEYS, while it should request auto-generated keys using Statement.RETURN_GENERATED_KEYS.

Excerpt from JDBC Connection javadoc for these methods: "Creates a default PreparedStatement object capable of returning the auto-generated keys".

This leads to INSERTs to fail with SQLException: "Cannot return generated keys: query was not set with Statement.RETURN_GENERATED_KEYS".

In particular, this makes Spring JDBC SimpleJdbcInsert unusable as under the cover prepareStatement(String sql, String columnNames[]) gets called.