SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 3)
    Literal \'clickhouse\' (alias s1)
    Literal \'mouse\' (alias s2)
    Function byteHammingDistance (children 1)
     ExpressionList (children 2)
      Identifier s1
      Identifier s2
