Tahir Butt wrote: > A final comment on this issue. > > oracle.jdbc.driver.OracleDriver is considerably faster than zxjdbc in > my case where I'm reading many rows. > > On Mar 9, 1:51 pm, Tahir Butt <tahir.b...@gmail.com> wrote: >> Sorry the zxjdbc test should read: >> >> cursor = db.cursor(1) >> cursor.execute(query) >> for r in cursor: >> pass
so, two (OK three) points here. One is that cx_oracle also "streams" results, and there are some caveats there we would likely need to apply, and another is that according to Philip Jenvey the zxjdbc cursor also loses some functionality in "dynamic" mode, i.e. that it is only appropriate for a select. So assuming the caveats of #1 apply, which is namely that LOB objects aren't fetched in "dynamic" mode until requested, the execution context would need to use the BufferedColumnResultProxy so that they are present in the case that fetchmany() or fetchall() is called. If the caveats in #2 apply, I would favor going with the approach that the psycopg2 dialect takes, and that is that you use the "stream_results" execution option if you'd like "streamed" results. In fact I sort of favor doing the "stream_results" option regardless for any non-default cursor behavior. it makes the implementation way simpler. third point, AFAIK zxjdbc is making usage of oracle.jdbc.OracleDriver. Though i see its hardcoding the "thin" aspect of it. the base zxJDBC connector should accept different driver names as arguments (is that what you're looking for ?) > > -- > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > To post to this group, send email to sqlalch...@googlegroups.com. > To unsubscribe from this group, send email to > sqlalchemy+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/sqlalchemy?hl=en. > > -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalch...@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
