Convert odb to Postgres

Hello everyone,

I have an OpenOffice dabatase that I'd like to convert to Postgres.
More specifically I need to replicate tables, not null constraints,
primary keys, foreign keys, autonumbers and data. There's a tool that
does this with Microsoft databses:

http://wiki.postgresql.org/wiki/Microsoft_Access_to_PostgreSQL_Conversion

Is there a counterpart of this tool for OpenOffice? Or any other tool
that may for instance convert OpenOffice databases into SQL
statements?

Thank you,

Luís