Hi all,
When testing behaviour of INITIALLY DEFERRED foreign key constraints I'm
confused by the following behaviour and I'd appreciate any interpretation!
I create the FK constraint on a column in a 1 million row table. This
works OK - if I update individual entries to nonsense values, there is no
error until I try to commit. So far so good.
However, if I do an UPDATE which affects all rows, and then commit, the
commit returns immediately (provided the UPDATE is to correct values, not
nonsense). Why is there no delay whilst validating the million
rows? (Certainly it takes several seconds to create the constraint in the
first place).
Any insight welcome!
Thanks
- Bill.
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Author: Bill Buchan
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