On Oct 30, 2009, at 8:45 PM, Ted Dziuba wrote: > Hi, > > I am trying to create an index on a fixed-width prefix of a VARCHAR > column in MySQL. In my Alchemy model, I have the following: > > url = Column(String(4096)) > > And I know that there an index = True parameter I can pass to the > Column constructor, but that will attempt to index the entire field. > MySQL restricts the length of a VARCHAR index, so I only want to > index the first 32 characters. In MySQL, the clause at table > creation time would be: > > KEY `url` (`url`(32)) > > But how do I get alchemy to generate this clause when it creates the > table?
I'm not familiar with that syntax, but assuming it can be generated via CREATE INDEX or ALTER outside of the CREATE TABLE itself, I would apply it using a DDL() construct that is associated with the "after- create" event of the Table object, containing the full MySQL-specific statement needed.. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@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 -~----------~----~----~----~------~----~------~--~---
