We have an application which used the jdbc 8.2-504 version. We have recently tried to update it to 42.2.5 jre 7 version. During this update we faced the issue "could not commit when autocommit is enabled" error so we have decided to assign false to autocommit during connection initiation. Now many of the SQL statements we use are select statements and we have read from many sources that even select statements should be committed to clear locks on tables. Is this necessary or is it ok to just close the connection after the operations are done(for select statements only).