Re: Check whether a NOT NULL check constraint has been validated

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От Stuart Campbell
Тема Re: Check whether a NOT NULL check constraint has been validated
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Msg-id CAAZ6SnyOHAcMHwAhj4fYUN2jp8FMQzSgTotifRG8Rz4tpGEMWQ@mail.gmail.com
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Ответ на Re: Check whether a NOT NULL check constraint has been validated  (Adrian Klaver <adrian.klaver@aklaver.com>)
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Hi Adrian,
 
Now I am not sure what you did.

Are you saying you used a CHECK constraint to check for NULL values?

That's right. Something like:

  ALTER TABLE foo ADD CONSTRAINT bar_not_null CHECK (bar IS NOT NULL) NOT VALID 
 
If so then pg_constraint.convalidated would work.

You're right. I didn't immediately find what I was looking for, and when I looked at the docs for pg_constraints, I guess I confused myself with this comment:

> Not-null constraints are represented in the pg_attribute catalog, not here.
 
Thanks for the assistance.

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