Sergei Golubchik 4c6c352138 MDEV-13596 CHECK constraints disallow NULL to pass through, violating SQL ...

SQL Standard (4.23.3.4 Table check constraints, part 2, SQL:2016) says
that CHECK constraint rejects rows *only* if the condition is FALSE.
That is, both TRUE and NULL should be allowed.

2017-09-18 10:12:23 +02:00

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