# name: test/optimizer/common_subplan.test
# description: Test the Common Subplan optimizer
# group: [optimizer]

statement ok
pragma explain_output='optimized_only'

# this should be automatically detected and materialized
query I
select t1.s + t2.s
from (select sum(range) s from range(10)) t1,
     (select sum(range) s from range(10)) t2
----
90

query II
explain select t1.s + t2.s
from (select sum(range) s from range(10)) t1,
     (select sum(range) s from range(10)) t2
----
logical_opt	<REGEX>:.*CTE.*

# this shouldn't because random() is volatile
query II
explain select t1.s + t2.s
from (select sum(random()) s from range(10)) t1,
     (select sum(random()) s from range(10)) t2
----
logical_opt	<!REGEX>:.*CTE.*

# common subplan inside of a materialized cte and outside of it
# should yield two ctes
query I
with cte as materialized (
    select sum(range) s from range(10)
)
select t1.s + t2.s
from cte t1,
     (select sum(range) s from range(10)) t2
----
90

query II
explain with cte as materialized (
    select sum(range) s from range(10)
)
select t1.s + t2.s
from cte t1,
     (select sum(range) s from range(10)) t2
----
logical_opt	<REGEX>:.*CTE.*CTE.*

require tpcds

statement ok
call dsdgen(sf=0)

# q44
query II
explain
SELECT asceding.rnk,
       i1.i_product_name best_performing,
       i2.i_product_name worst_performing
FROM
  (SELECT *
   FROM
     (SELECT item_sk,
             rank() OVER (
                          ORDER BY rank_col ASC) rnk
      FROM
        (SELECT ss_item_sk item_sk,
                avg(ss_net_profit) rank_col
         FROM store_sales ss1
         WHERE ss_store_sk = 4
         GROUP BY ss_item_sk
         HAVING avg(ss_net_profit) > 0.9*
           (SELECT avg(ss_net_profit) rank_col
            FROM store_sales
            WHERE ss_store_sk = 4
              AND ss_addr_sk IS NULL
            GROUP BY ss_store_sk))V1)V11
   WHERE rnk < 11) asceding,
  (SELECT *
   FROM
     (SELECT item_sk,
             rank() OVER (
                          ORDER BY rank_col DESC) rnk
      FROM
        (SELECT ss_item_sk item_sk,
                avg(ss_net_profit) rank_col
         FROM store_sales ss1
         WHERE ss_store_sk = 4
         GROUP BY ss_item_sk
         HAVING avg(ss_net_profit) > 0.9*
           (SELECT avg(ss_net_profit) rank_col
            FROM store_sales
            WHERE ss_store_sk = 4
              AND ss_addr_sk IS NULL
            GROUP BY ss_store_sk))V2)V21
   WHERE rnk < 11) descending,
     item i1,
     item i2
WHERE asceding.rnk = descending.rnk
  AND i1.i_item_sk=asceding.item_sk
  AND i2.i_item_sk=descending.item_sk
ORDER BY asceding.rnk
LIMIT 100;
----
logical_opt	<REGEX>:.*CTE.*

# q65
query II
explain
SELECT s_store_name,
       i_item_desc,
       sc.revenue,
       i_current_price,
       i_wholesale_cost,
       i_brand
FROM store,
     item,
  (SELECT ss_store_sk,
          avg(revenue) AS ave
   FROM
     (SELECT ss_store_sk,
             ss_item_sk,
             sum(ss_sales_price) AS revenue
      FROM store_sales,
           date_dim
      WHERE ss_sold_date_sk = d_date_sk
        AND d_month_seq BETWEEN 1176 AND 1176+11
      GROUP BY ss_store_sk,
               ss_item_sk) sa
   GROUP BY ss_store_sk) sb,
  (SELECT ss_store_sk,
          ss_item_sk,
          sum(ss_sales_price) AS revenue
   FROM store_sales,
        date_dim
   WHERE ss_sold_date_sk = d_date_sk
     AND d_month_seq BETWEEN 1176 AND 1176+11
   GROUP BY ss_store_sk,
            ss_item_sk) sc
WHERE sb.ss_store_sk = sc.ss_store_sk
  AND sc.revenue <= 0.1 * sb.ave
  AND s_store_sk = sc.ss_store_sk
  AND i_item_sk = sc.ss_item_sk
ORDER BY s_store_name NULLS FIRST,
         i_item_desc NULLS FIRST
LIMIT 100;
----
logical_opt	<REGEX>:.*CTE.*