how to set ownership of tables?

Hello!

how can i change the ownership of a table? i have the problem that i
create table with CONSTRAINTS on other tables, those others have a
different owner... and thus the creation of the table is refused....

is it possible to make constraints on tables whithout having their
ownership? is it possible to grant those rights?

or otherwise, how can i change the owenership of the concerned table?

-- 
ciao bboett
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