SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function count (children 1)
     ExpressionList
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function s3 (children 1)
       ExpressionList (children 4)
        Identifier s3_conn
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier filename
          Literal \'03322_*.parquet\'
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier format
          Literal \'Parquet\'
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier structure
          Literal \'a Int, b Int, c Int\'
