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由 Ryuta Kamizono 提交于
Follow up to #18228. In MySQL and PostgreSQL, primary key is to be `NOT NULL` implicitly. But in SQLite it must be specified `NOT NULL` explicitly.
98fb3744
Follow up to #18228. In MySQL and PostgreSQL, primary key is to be `NOT NULL` implicitly. But in SQLite it must be specified `NOT NULL` explicitly.