Hi, Maybe you’ve run into this: https://groups.google.com/forum/#!topic/sqlalchemy/8Xn31vBfGKU
Gabor From: sqlalchemy@googlegroups.com [mailto:sqlalchemy@googlegroups.com] On Behalf Of Thierry Florac Sent: 12 May 2014 23:13 To: sqlalchemy Subject: [sqlalchemy] Oracle index not used on SQLAlchemy prepared statement Hi, I use Python and SQLAlchemy to access an Oracle 11 database. As far as I think, SQLAlchemy always use prepared statements. On a huge table (4 millions records), correctly indexed, SQLAlchemy filters queries doesn't use the index, so doing a full table scan is very slow ; using the same SQL code in a "raw" SQL editor (SQLplus) make Oracle use the index with good performances. We tried to add "+index" hints on requests, without effect on Oracle execution path which still doesn't want to use the index. Any idea ? Is it possible to really force Oracle to use an index, or to make SQLAlchemy to not use prepared statements ?? Best regards, Thierry -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com<mailto:sqlalchemy+unsubscr...@googlegroups.com>. To post to this group, send email to sqlalchemy@googlegroups.com<mailto:sqlalchemy@googlegroups.com>. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout. ________________________________ NOTICE: Morgan Stanley is not acting as a municipal advisor and the opinions or views contained herein are not intended to be, and do not constitute, advice within the meaning of Section 975 of the Dodd-Frank Wall Street Reform and Consumer Protection Act. If you have received this communication in error, please destroy all electronic and paper copies and notify the sender immediately. Mistransmission is not intended to waive confidentiality or privilege. Morgan Stanley reserves the right, to the extent permitted under applicable law, to monitor electronic communications. This message is subject to terms available at the following link: http://www.morganstanley.com/disclaimers If you cannot access these links, please notify us by reply message and we will send the contents to you. By messaging with Morgan Stanley you consent to the foregoing. -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.
