should be it

external/duckdb/benchmark/tpch_plan_cost/queries/q20.sql

@@ -0,0 +1,34 @@
+SELECT
+    s_name,
+    s_address
+FROM
+    supplier,
+    nation
+WHERE
+    s_suppkey IN (
+        SELECT
+            ps_suppkey
+        FROM
+            partsupp
+        WHERE
+            ps_partkey IN (
+                SELECT
+                    p_partkey
+                FROM
+                    part
+                WHERE
+                    p_name LIKE 'forest%')
+                AND ps_availqty > (
+                    SELECT
+                        0.5 * sum(l_quantity)
+                    FROM
+                        lineitem
+                    WHERE
+                        l_partkey = ps_partkey
+                        AND l_suppkey = ps_suppkey
+                        AND l_shipdate >= CAST('1994-01-01' AS date)
+                        AND l_shipdate < CAST('1995-01-01' AS date)))
+            AND s_nationkey = n_nationkey
+            AND n_name = 'CANADA'
+        ORDER BY
+            s_name;