[sqlalchemy] Postgresql COPY
Is it possible to execute a Postegresql COPY ... FROM STDIN statement via sqlalchemy, or do we have to drop down to psycopg2 for that (http://initd.org/psycopg/docs/usage.html#using-copy-to-and-copy-from)? Tried executing a COPY statement followed directly by the input values, as in psql, but that didn't work. Thanks in advance. -- Yang Zhang http://yz.mit.edu/ -- 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.
Re: [sqlalchemy] Postgresql COPY
On Apr 15, 2011, at 3:17 AM, Yang Zhang wrote: Is it possible to execute a Postegresql COPY ... FROM STDIN statement via sqlalchemy, or do we have to drop down to psycopg2 for that (http://initd.org/psycopg/docs/usage.html#using-copy-to-and-copy-from)? Tried executing a COPY statement followed directly by the input values, as in psql, but that didn't work. Thanks in advance. SQLAlchemy doesn't have functions that connect to psycopg2's copy_from() etc. methods and from psycopg2s docs it seems this is how those functions are usable, as opposed to emitting the word COPY. So you know as much as I do here, and you likely have to use the psycopg2 connection.you can get one from the pool via engine.raw_connection() if you wanted. -- Yang Zhang http://yz.mit.edu/ -- 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. -- 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.
Re: [sqlalchemy] Postgresql COPY
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Il 15/04/2011 09:17, Yang Zhang ha scritto: Is it possible to execute a Postegresql COPY ... FROM STDIN statement via sqlalchemy, or do we have to drop down to psycopg2 for that (http://initd.org/psycopg/docs/usage.html#using-copy-to-and-copy-from)? Tried executing a COPY statement followed directly by the input values, as in psql, but that didn't work. Thanks in advance. The problem is that psycopg2, if I'm not wrong, only supports an high level interface to COPY command. With plain libpq, you can issue a normal query string with the COPY command, and then use PQputCopyData and PQputCopyEnd functions to send data. psycopg2, instead, implements custom methods for copy support (I assume this is done to avoid having to handle/expose the additional PGRES_COPY_OUT or PGRES_COPY_IN status code, and an additional PGRES_COMMAND_OK after PQputCopyEnd). Regards Manlio -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk2odH0ACgkQscQJ24LbaURe/gCgmptRuAv1usFDYIzChjUIDt/1 bdwAnjLUij/CFScNEv1zV/K/Y//v9Akf =Sxsi -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 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.
