Does this only work on PostgreSQL? I need this to work on PostgreSQL, MySQL and SQLite.
Am Donnerstag, 15. Januar 2015 20:15:43 UTC+1 schrieb Michael Bayer: > > you should be able to cast as interval: > > > from sqlalchemy.dialects.postgresql import INTERVAL > from sqlalchemy import cast > > select([test]).where(test.c.finished_on + cast(‘1 sec’, INTERVAL) * > test.c.wait < func.NOW()) > > > Guido Winkelmann <gu...@ambient-entertainment.de <javascript:>> wrote: > > > Hi, > > > > How can I add one column containing integer values (NULL allowed), > treating > > them as seconds, to another column from the same table containing > datetime > > values and compare the result to the current time? > > > > I have a table with a datetime column "finished_on" and in int column > "wait". > > Once wait seconds have passed since finished_on, I need to do something > with > > that row. In postgres, the query to find these rows would look something > like > > this: > > > > SELECT * FROM test WHERE finished_on + INTERVAL '1 sec' * wait < NOW(); > > > > How can I make a query like that in sqlalchemy? > > > > I have tried googling the problem, but the only solutions I found where > those > > where you already have the interval value available in the calling > python > > code. This doesn't help me here, since the interval can be different for > each > > row. > > > > Regards, > > > > Guido W. > > > > -- > > 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+...@googlegroups.com <javascript:>. > > To post to this group, send email to sqlal...@googlegroups.com > <javascript:>. > > Visit this group at http://groups.google.com/group/sqlalchemy. > > For more options, visit https://groups.google.com/d/optout. > -- 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.
