2 queries, the only difference is that the second query (q2.sql) has an empty trigger.
In version 10.5.26 the behavior is the same (q1.sql and q2.sql), the result is as expected (7 rows affected).
In version 10.5.28 q2.sql gives an unexpected result (2 rows affected, 10 warnings).
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MDEV-36026
Problem with INSERT SELECT on NOT NULL columns while having BEFORE UPDATE trigger
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Closed
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Critical
Thank you for the report!
yes, this is the same problem as
MDEV-36026, I've checked that commit cd7513995dd67bf9376681c0986b8a5c484188c8 fixes the problem , q2.sql returnes the expected result.