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system catalog constraints question - Mailing list pgsql-hackers

From Gevik Babakhani
Subject system catalog constraints question
Date
Msg-id 000f01c861c7$d65e7580$0a01a8c0@gevmus
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Responses Re: system catalog constraints question  ("Heikki Linnakangas" <heikki@enterprisedb.com>)
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Hi,

Is there a way to query the column constraints between the tables of system
catalog.
For example pg_attribute.atttypid---->pg_type.oid. This is described in the 
docs of course , but does the system use something like pg_constaint 
or the system catalog constraints are enforced only in the code?

Regards,
Gevik.

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