Support complex types

     drop table if exists functional.complextypestbl;
     create external table functional.complextypestbl (
       id bigint,
       int_array array<int>,
       int_array_array array<array<int>>,
       int_map map<string, int>,
       int_map_array array<map<string, int>>,
       nested_struct struct<a: int, b: array<int>,
         c: struct<d: array<array<struct<e: int, f: string>>>>,
         g: map<string, struct<h: struct<i: array<float>>>>>)
       stored as parquet
       location '/test-warehouse/complextypestbl_parquet/';

       select id, a.item from functional.complextypestbl t, t.int_array a;

     select int_array from functional.complextypestbl;