Raw constraint & pg_relcheck.rcsrc

Hi all,

I have a question.
As far as I see,constraints are stored into PG database ordinarily
as follows.
 1) RelationAddRawConstraints() converts each raw constaint     to bin form. 2) StoreRelCheck() converts the bin form
tosrc form and store     them into pg_relcheck tuples.
 

Is pg_relcheck.rcsrc equivalent to the original raw constraint ?

Regards.

Hiroshi Inoue
Inoue@tpf.co.jp