DROP TABLE IF EXISTS lineitem;
DROP TABLE IF EXISTS part;
DROP TABLE IF EXISTS q17_small_quantity_order_revenue;
DROP TABLE IF EXISTS lineitem_tmp;

-- create the tables and load the data
create external table lineitem (L_ORDERKEY INT, L_PARTKEY INT, L_SUPPKEY INT, L_LINENUMBER INT, L_QUANTITY DOUBLE, L_EXTENDEDPRICE DOUBLE, L_DISCOUNT DOUBLE, L_TAX DOUBLE, L_RETURNFLAG STRING, L_LINESTATUS STRING, L_SHIPDATE STRING, L_COMMITDATE STRING, L_RECEIPTDATE STRING, L_SHIPINSTRUCT STRING, L_SHIPMODE STRING, L_COMMENT STRING) ROW FORMAT DELIMITED FIELDS TERMINATED BY '|' STORED AS TEXTFILE LOCATION '/tpch/lineitem';
create external table part (P_PARTKEY INT, P_NAME STRING, P_MFGR STRING, P_BRAND STRING, P_TYPE STRING, P_SIZE INT, P_CONTAINER STRING, P_RETAILPRICE DOUBLE, P_COMMENT STRING) ROW FORMAT DELIMITED FIELDS TERMINATED BY '|' STORED AS TEXTFILE LOCATION '/tpch/part';

-- create the result table
create table q17_small_quantity_order_revenue (avg_yearly double);
create table lineitem_tmp (t_partkey int, t_avg_quantity double);

-- the query
insert overwrite table lineitem_tmp
select 
  l_partkey as t_partkey, 0.2 * avg(l_quantity) as t_avg_quantity
from 
  lineitem
group by l_partkey;

insert overwrite table q17_small_quantity_order_revenue
select
  sum(l_extendedprice) / 7.0 as avg_yearly
from
  (select l_quantity, l_extendedprice, t_avg_quantity from
   lineitem_tmp t join
     (select
        l_quantity, l_partkey, l_extendedprice
      from
        part p join lineitem l
        on
          p.p_partkey = l.l_partkey
          and p.p_container = 'MED BOX'
      ) l1 on l1.l_partkey = t.t_partkey
   ) a
where l_quantity < t_avg_quantity;