SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function groupArray (children 1)
     ExpressionList (children 1)
      Identifier dt
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier date_datetime_key_condition
   Function or (children 1)
    ExpressionList (children 2)
     Function less (children 1)
      ExpressionList (children 2)
       Identifier dt
       Function toDate (children 1)
        ExpressionList (children 1)
         Literal \'2019-01-02\'
     Function greater (children 1)
      ExpressionList (children 2)
       Identifier dt
       Function toDate (children 1)
        ExpressionList (children 1)
         Literal \'2021-01-02\'
