On 2023-Aug-29, Kyotaro Horiguchi wrote:

> Attached is the initial version of the patch. It prevents "CREATE
> TABLE" from executing if there is an inconsisntent not-null
> constraint.  Also I noticed that "ALTER TABLE t ADD NOT NULL c NO
> INHERIT" silently ignores the "NO INHERIT" part and fixed it.

Great, thank you.  I pushed it after modifying it a bit -- instead of
throwing the error in MergeAttributes, I did it in
AddRelationNotNullConstraints().  It seems cleaner this way, mostly
because we already have to match these two constraints there.  (I guess
you could argue that we waste catalog-insertion work before the error is
reported and the whole thing is aborted; but I don't think this is a
serious problem in practice.)

-- 
Álvaro Herrera               48°01'N 7°57'E  —  https://www.EnterpriseDB.com/
"En las profundidades de nuestro inconsciente hay una obsesiva necesidad
de un universo lógico y coherente. Pero el universo real se halla siempre
un paso más allá de la lógica" (Irulan)


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