Re: Support NOT VALID / VALIDATE constraint options for named NOT NULL constraints

Recursion to child tables is incorrectly trying to locate the constraint
by name:

create table notnull_tbl1 (a int);
alter table notnull_tbl1 add constraint foo not null a not valid;
create table notnull_chld (a int);
alter table notnull_chld add constraint blah not null a not valid;
alter table notnull_chld inherit notnull_tbl1 ;

-- this fails but shouldn't:
alter table notnull_tbl1 validate constraint foo;
ERROR:  constraint "foo" of relation "notnull_chld" does not exist

The end result here should be that the constraint `blah` in table
notnull_chld is marked as validated.

--
Álvaro Herrera               48°01'N 7°57'E  —  https://www.EnterpriseDB.com/
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