SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function arrayStringConcat (children 1)
     ExpressionList (children 2)
      Identifier arr
      Literal \'; \'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 1)
           Function materialize (alias arr) (children 1)
            ExpressionList (children 1)
             Function array (children 1)
              ExpressionList (children 3)
               Function toDate (children 1)
                ExpressionList (children 1)
                 Literal \'2021-10-01\'
               Literal NULL
               Function toDate (children 1)
                ExpressionList (children 1)
                 Literal \'2021-10-02\'