Re: database conversion to postgres

On May 19, 2005, at 11:01 AM, Keith Worthington wrote:

> Jeff Dyke wrote:
>> I'm very new to postgres but not to databases. I'm currently working
>> on a back end platform of Adaptive Server Anywhere 9.0 (Sybase) and
>> would like to move to Postgres.  I have a total of 6 production
>> databases, so about 24(dev/test/qa etc) dbs that need to be converted
>> first, so I'll have plenty of practice for the prod versions. The
>> largest of which is ~6G, and the smallest only ~100M.
>> I've done some searching on and have not found anything quick and
>> easy, and didn't really expect to, but was interested in any pointers
>> anyone may have.
>> The dbs are currently on a windows platform and will remain so, at
>> least for this first conversion.
>> I don't mind doing it programatically and that may be my only
>> choice...PHP/Perl.   Currently i connect to sybase solely over
>> odbc....anyway.  Any/all comments and welcomed and appreciated.
>> Thanks
>> Jeff
>
> Jeff,
>
> I am not familiar with the utilities that you may have with Sybase.
> Do you have one that will output the SQL statements required to build
> the database?  If so then you could use that file as input to psql to
> rebuild the database in PostgreSQL.  Of course it will probably choke
> but reviewing the error log would point you in the direction of the
> required changes.  A good scrub with an editor like sed or Perl may
> clean up a number of common changes.

There is also SQL::Translator, a set of perl modules for doing these
types of conversions.  It isn't perfect, but does reduce the
grunt-work.

Sean