Partitions Table

Dear all,

i want to create partitions table :

*create table advertisements_otomotif (CHECK (select * from
advertisements where category_id in (select id from categories where
name='Otomotif'))) INHERITS (advertisements)
*

but i have error like this:

*ERROR:  syntax error at or near "select"
LINE 1: create table advertisements_otomotif (CHECK (select * from a...
                                                     ^


********** Error **********

ERROR: syntax error at or near "select"
SQL state: 42601
Character: 46

*any have sollutions?

thanks