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CREATE TABLE test_table ( a INT, b INT ) ENGINE = InnoDB; INSERT INTO test_table VALUES (1, 2), (2, 3), (3, 4); ALTER TABLE test_table ADD COLUMN a_b_sum INT AS (a + b); SELECT * FROM test_table; INSERT INTO test_table VALUES (5, 7), (2, 9), (2, 3); ALTER TABLE test_table ALTER COLUMN a_b_sum SET INVISIBLE; INSERT INTO test_table VALUES (5, 7), (2, 9), (2, 3); SELECT a, b, a_b_sum FROM test_table;

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