CREATE TABLE test ( `a1` UInt64 DEFAULT a + 1, `a1` UInt64 DEFAULT a + 1, `a2` UInt64 DEFAULT a3 + a4, `a3` UInt64 DEFAULT a2 + 1, `a4` UInt64 ALIAS a3 + 1 ) ENGINE = Log; -- { serverError 174 } CREATE TABLE pythagoras ( `a` Float64 DEFAULT sqrt((c * c) - (b * b)), `b` Float64 DEFAULT sqrt((c * c) - (a * a)), `c` Float64 DEFAULT sqrt((a * a) + (b * b)) ) ENGINE = Log; -- { serverError 174 } -- TODO: It works but should not: CREATE TABLE test (a DEFAULT b, b DEFAULT a) ENGINE = Memory