func (e *Evaluator) handleBitOp(o *ast.BinaryOperationExpr) bool { a, b, err := types.CoerceDatum(e.sc, *o.L.GetDatum(), *o.R.GetDatum()) if err != nil { e.err = errors.Trace(err) return false } if a.IsNull() || b.IsNull() { o.SetNull() return true } x, err := a.ToInt64(e.sc) if err != nil { e.err = errors.Trace(err) return false } y, err := b.ToInt64(e.sc) if err != nil { e.err = errors.Trace(err) return false } // use a int64 for bit operator, return uint64 switch o.Op { case opcode.And: o.SetUint64(uint64(x & y)) case opcode.Or: o.SetUint64(uint64(x | y)) case opcode.Xor: o.SetUint64(uint64(x ^ y)) case opcode.RightShift: o.SetUint64(uint64(x) >> uint64(y)) case opcode.LeftShift: o.SetUint64(uint64(x) << uint64(y)) default: e.err = ErrInvalidOperation.Gen("invalid op %v in bit operation", o.Op) return false } return true }