On Feb 10, 2010, at 6:52 PM, Bobby Impollonia wrote: > I am constructing queries involving MSTimeStamp fields in MySQL and am > being receiving "Incorrect datetime value" warnings even in > situations where my queries are valid in MySQL. > > How do I modify the following query so that sqlalchemy will accept it > without warning: > session.query(MyClass.id).filter(MyClass.timestamp > (func.now() - > 20000)).first() > ? > > The generated sql is > SELECT my_table.id AS my_table_id > FROM my_table > WHERE my_table.timestamp > now() - %s > LIMIT 0, 1 > > The warning I get is > /usr/lib/pymodules/python2.5/sqlalchemy/engine/default.py:123: > Warning: Incorrect datetime value: '20100209953011.000000' for column > 'timestamp' at row 1 > cursor.execute(statement, parameters) > > Why is sqlalchemy even seeing the value '20100209953011.000000', which > is the outcome of the now() - 20000 operation inside the query? > > I tried changing > (func.now() - 20000) > to > func.timestamp (func.now() - 20000) > but I still get the same warning. > > If I change 20000 to 200, I don't get warned. Why would this be? > > It works with no warning if I change it to > session.query(MyClass.id).filter(func.now() - MyClass.timestamp > > 20000).first() > , but that is not an acceptable solution because now MySQL can't use > my index on MyClass.timestamp.
That warning is not generated by SQLAlchemy so it is not "seeing" it. MySQL-python is generating that warning. You'd have to consult the DBAPI's mailing list for help on this one since SQLA just passes your bound values straight through - I'm not familiar with what that "20000" might mean in MySQL parlance, 20000 seconds ? no clue. > > I am using SQLA .5.5 > > -- > 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.
