-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Michael Bayer ha scritto: > Manlio Perillo wrote: > Hi. > > I would like to use SQL schemas in my projects, however support in > SQLAlchemy is quite poor. > > What I want to do is to create a custom MetaData object, that allows me > to specify the default schema name to use. > > All tables bound to that meta data, will be created inside that schema. > With a DDL listener, I then make sure CREATE SCHEMA and DROP SCHEMA > statements are issued. > >> does this work for you ? >
> [...] Ok, sorry for the delay. Following your suggestions I have written this: http://paste.pocoo.org/show/175512/ What do you think? When writing this code I found some problems with SQLAlchemy: 1) There is no support for SQL Schema at all. It is ok, for me, if there is no direct support for SQL Schema in SQLAlchemy, but this is a standard feature, so SQLALchemy dialects should: * define a `supports_schemas` attribute, as a boolean * define a `has_schema` method, to check is a schema exists Can I fill a ticket with this feature request? 2) I would like to emulate SQL Schema support in SQLite, using secondary databases, attached to the main database. However, I noted that SQLAlchemy executes the following query: BEGIN PRAGMA "test".table_info("test") () ROLLBACK for a table named "test" in a schema named "test" (to be precise, the previous query is exected two times). It seems that SQLAlchemy assumes that the schema refers to a secondary database. The problem is that SQLAlchemy executes these queries **before** my DDL listener is called, so the query fails because I don't have yet attached the secondary database. I think that this behaviour is incorrect. The "before-create" listeners of a MetaData object should be called before checking if the tables exist. Should I fill a bug report? Thanks Manlio -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAktwipkACgkQscQJ24LbaUQ7uACggb3Q3kgAQL99XQaqt6lOxSRF Fx8AnRxjpmtcpSJ8foMhAptKUWxaF6X3 =ZCiM -----END PGP SIGNATURE----- -- 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.
