BEFORE triggers and NOT NULL columns in MySQL
Introduction For a long time there was a Bug#6295 in implementation of BEFORE triggers related to handling of NOT NULL column. The problem was that if a column is declared as NOT NULL, it wasn’t...
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Support for multiple triggers per table for the same value of action/timing.
Introduction For a long time MySQL server supported only one trigger for every action (INSERT, UPDATE, DELETE) and timing (BEFORE or AFTER). In other words, there could be at most one trigger for every...
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