SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function lessOrEquals (children 1)
     ExpressionList (children 2)
      Function minus (children 1)
       ExpressionList (children 2)
        Function dateDiff (children 1)
         ExpressionList (children 3)
          Literal \'second\'
          Function toDate32 (children 1)
           ExpressionList (children 1)
            Literal \'1927-01-01\'
          Function toDate32 (children 1)
           ExpressionList (children 1)
            Literal \'1927-01-02\'
        Function timeDiff (children 1)
         ExpressionList (children 2)
          Function toDate32 (children 1)
           ExpressionList (children 1)
            Literal \'1927-01-01\'
          Function toDate32 (children 1)
           ExpressionList (children 1)
            Literal \'1927-01-02\'
      Literal UInt64_2