should be it

external/duckdb/test/sql/join/pushdown/pushdown_generated_columns.test

@@ -0,0 +1,27 @@
+# name: test/sql/join/pushdown/pushdown_generated_columns.test
+# description: Join pushdown on generated columns
+# group: [pushdown]
+
+statement ok
+PRAGMA enable_verification
+
+statement ok
+CREATE TABLE unit2(
+	price INTEGER,
+	amount_sold INTEGER,
+	total_profit INTEGER GENERATED ALWAYS AS (price * amount_sold) VIRTUAL,
+	also_total_profit INTEGER GENERATED ALWAYS AS (total_profit) VIRTUAL
+);
+
+statement ok
+INSERT INTO unit2 SELECT i, 20 FROM range(1000) t(i);
+
+query IIII
+SELECT * FROM unit2 JOIN (VALUES (2000)) t(total_profit) USING (total_profit);
+----
+100	20	2000	2000
+
+query IIIII
+SELECT * FROM unit2 JOIN (VALUES (2000)) t(total_profit) ON (t.total_profit = unit2.total_profit AND t.total_profit=unit2.also_total_profit);
+----
+100	20	2000	2000	2000

external/duckdb/test/sql/join/pushdown/pushdown_join_subquery.test_slow

@@ -0,0 +1,134 @@
+# name: test/sql/join/pushdown/pushdown_join_subquery.test_slow
+# description: Test join filter pushdown with subqueries
+# group: [pushdown]
+
+statement ok
+PRAGMA enable_verification
+
+statement ok
+CREATE TABLE integers AS SELECT CASE WHEN i%2=0 THEN NULL ELSE i END i FROM range(1000) t(i)
+
+# expression on LHS
+query II
+SELECT * FROM integers JOIN (SELECT MAX(i) AS max_i FROM integers) ON i+2=max_i
+----
+997	999
+
+# expression on RHS
+query II
+SELECT * FROM integers JOIN (SELECT MAX(i) AS max_i FROM integers) ON i=max_i-2
+----
+997	999
+
+# filter
+query II
+SELECT * FROM (FROM integers WHERE i%2 = 1) JOIN (SELECT MAX(i) AS max_i FROM integers) ON i=max_i
+----
+999	999
+
+# filter that can be pushed down
+query II
+SELECT * FROM (FROM integers WHERE i>500) JOIN (SELECT MAX(i) AS max_i FROM integers) ON i=max_i
+----
+999	999
+
+# limit
+query II
+SELECT * FROM (FROM integers LIMIT 10000) JOIN (SELECT MAX(i) AS max_i FROM integers) ON i=max_i
+----
+999	999
+
+# order by
+query II
+SELECT * FROM (FROM integers ORDER BY i) JOIN (SELECT MAX(i) AS max_i FROM integers) ON i=max_i
+----
+999	999
+
+# top-n
+query II
+SELECT * FROM (FROM integers ORDER BY i DESC LIMIT 10) JOIN (SELECT MAX(i) AS max_i FROM integers) ON i=max_i
+----
+999	999
+
+# projection
+query III
+SELECT * FROM (SELECT i + 2 AS i, i AS k FROM integers) JOIN (SELECT MAX(i) AS max_i FROM integers) ON i=max_i
+----
+999	997	999
+
+# group by with join on grouping column
+query II
+SELECT * FROM (SELECT i FROM integers GROUP BY i) JOIN (SELECT MAX(i) AS max_i FROM integers) ON i=max_i
+----
+999	999
+
+# group by with join on aggregate
+query III
+SELECT * FROM (SELECT (1000 - i) AS grp, SUM(i) AS i FROM integers GROUP BY grp) JOIN (SELECT MAX(i) AS max_i FROM integers) ON i=max_i
+----
+1	999	999
+
+# distinct
+query II
+SELECT * FROM (SELECT DISTINCT i FROM integers) JOIN (SELECT MAX(i) AS max_i FROM integers) ON i=max_i
+----
+999	999
+
+# window
+query IIII
+SELECT * FROM (SELECT i + 2 AS i, i AS k, row_number() over () as rownum FROM integers) JOIN (SELECT MAX(i) AS max_i FROM integers) ON i=max_i
+----
+999	997	998	999
+
+statement ok
+CREATE TABLE lists AS SELECT CASE WHEN i%2=0 THEN NULL ELSE i END AS i, [500 + i, 500 + i + 1, 500 + i + 2] l FROM range(1000) t(i)
+
+# unnest where filter applies to non-unnest column
+query III
+SELECT * FROM (SELECT i, UNNEST(l) AS l FROM lists) JOIN (SELECT MAX(i) AS max_i FROM lists) ON i=max_i
+----
+999	1499	999
+999	1500	999
+999	1501	999
+
+# unnest where filter applies to unnest column
+query III
+SELECT * FROM (SELECT i AS k, UNNEST(l) AS i FROM lists) JOIN (SELECT MAX(i) AS max_i FROM lists) ON i=max_i
+----
+497	999	999
+NULL	999	999
+499	999	999
+
+# set operations
+# union
+query II
+SELECT * FROM (FROM integers UNION ALL FROM integers) JOIN (SELECT MAX(i) AS max_i FROM integers) ON i=max_i
+----
+999	999
+999	999
+
+query II
+SELECT * FROM (FROM integers UNION FROM integers) JOIN (SELECT MAX(i) AS max_i FROM integers) ON i=max_i
+----
+999	999
+
+# intersect
+query II
+SELECT * FROM (FROM integers INTERSECT FROM integers) JOIN (SELECT MAX(i) AS max_i FROM integers) ON i=max_i
+----
+999	999
+
+query II
+SELECT * FROM (FROM integers INTERSECT ALL FROM integers) JOIN (SELECT MAX(i) AS max_i FROM integers) ON i=max_i
+----
+999	999
+
+# except
+query II
+SELECT * FROM (FROM integers EXCEPT (SELECT 42)) JOIN (SELECT MAX(i) AS max_i FROM integers) ON i=max_i
+----
+999	999
+
+query II
+SELECT * FROM ((SELECT 999 i) EXCEPT FROM integers) JOIN (SELECT MAX(i) AS max_i FROM integers) ON i=max_i
+----

external/duckdb/test/sql/join/pushdown/pushdown_join_tpch.test_slow

@@ -0,0 +1,44 @@
+# name: test/sql/join/pushdown/pushdown_join_tpch.test_slow
+# description: Test join filter pushdown on TPC-H
+# group: [pushdown]
+
+require tpch
+
+statement ok
+CALL dbgen(sf=1);
+
+# single join
+query II
+SELECT l_orderkey, l_comment FROM lineitem WHERE l_orderkey=(SELECT MAX(l_orderkey) FROM lineitem) ORDER BY ALL
+----
+6000000	pecial excuses nag evenly f
+6000000	riously pe
+
+# multiple joins
+query III
+select l_orderkey, l_linenumber, l_comment
+from lineitem
+where l_linenumber=(select max(l_linenumber) from lineitem) AND
+      l_orderkey=(SELECT MAX(l_orderkey) FROM lineitem WHERE l_linenumber=7);
+----
+5999968	7	. express requests are
+
+# involving separate tables
+query I
+select count(*) from lineitem where l_linenumber=(select max(l_linenumber) from lineitem) and l_suppkey=(select max(s_suppkey) from supplier);
+----
+16
+
+# bunch of joins
+query IIII
+select l_orderkey, o_orderpriority, l_suppkey, l_linenumber
+from lineitem join orders on (l_orderkey=o_orderkey)
+where l_linenumber=(select max(l_linenumber) from lineitem) and
+      l_suppkey=(select max(s_suppkey) from supplier) and
+      o_orderpriority=(select max(o_orderpriority) from orders)
+order by all
+----
+2076419	5-LOW	10000	7
+2770594	5-LOW	10000	7
+3196290	5-LOW	10000	7
+3892931	5-LOW	10000	7

external/duckdb/test/sql/join/pushdown/pushdown_join_types.test

@@ -0,0 +1,61 @@
+# name: test/sql/join/pushdown/pushdown_join_types.test
+# description: Test join filter pushdown with various join types
+# group: [pushdown]
+
+statement ok
+PRAGMA enable_verification
+
+statement ok
+CREATE TABLE integers AS SELECT CASE WHEN i%2=0 THEN NULL ELSE i END i FROM range(1000) t(i)
+
+# inner join
+query II
+SELECT * FROM integers JOIN (SELECT MAX(i) AS max_i FROM integers) ON i=max_i
+----
+999	999
+
+# right join
+query II
+SELECT * FROM integers RIGHT JOIN (SELECT MAX(i) AS max_i FROM integers) ON i=max_i
+----
+999	999
+
+# left join
+query II
+SELECT COUNT(*), COUNT(max_i) IS NOT NULL FROM (
+SELECT * FROM integers LEFT JOIN (SELECT MAX(i) AS max_i FROM integers) ON i=max_i
+)
+----
+1000	1
+
+query II
+SELECT COUNT(*), COUNT(max_i) IS NOT NULL FROM (
+SELECT * FROM integers FULL OUTER JOIN (SELECT MAX(i) AS max_i FROM integers) ON i=max_i
+)
+----
+1000	1
+
+# semi join
+query I
+SELECT * FROM integers WHERE i=(SELECT MAX(i) FROM integers)
+----
+999
+
+query I
+SELECT * FROM integers WHERE i IN (SELECT MAX(i) FROM integers)
+----
+999
+
+# multiple values
+query I
+SELECT * FROM integers WHERE i IN (997, 999)
+----
+997
+999
+
+# mark join
+query II
+SELECT COUNT(*), SUM(CASE WHEN in_result THEN 1 ELSE 0 END) FROM
+(SELECT i IN (SELECT MAX(i) FROM integers) AS in_result FROM integers)
+----
+1000	1

external/duckdb/test/sql/join/pushdown/pushdown_many_columns.test_slow

@@ -0,0 +1,33 @@
+# name: test/sql/join/pushdown/pushdown_many_columns.test_slow
+# description: Test join filter pushdown on multiple columns
+# group: [pushdown]
+
+statement ok
+PRAGMA enable_verification
+
+# two columns of different types
+statement ok
+CREATE TABLE tbl AS SELECT CASE WHEN i%2=0 THEN NULL ELSE i END i, concat('thisisastring', i) s FROM range(1000) t(i)
+
+query II
+SELECT s, i FROM tbl WHERE i>10 AND s=(SELECT MAX(s) FROM tbl)
+----
+thisisastring999	999
+
+query II
+SELECT s, i FROM tbl JOIN (VALUES (999, 'thisisastring999')) t(i, s) USING (s, i)
+----
+thisisastring999	999
+
+# all types
+statement ok
+CREATE TABLE all_types AS FROM test_all_types();
+
+foreach col <all_types_columns>
+
+query I
+SELECT COUNT(*) FROM all_types WHERE "${col}"=(SELECT MIN("${col}") FROM all_types)
+----
+1
+
+endloop

external/duckdb/test/sql/join/pushdown/pushdown_many_joins.test

@@ -0,0 +1,43 @@
+# name: test/sql/join/pushdown/pushdown_many_joins.test
+# description: Test join filter pushdown with many joins
+# group: [pushdown]
+
+statement ok
+PRAGMA enable_verification
+
+statement ok
+CREATE TABLE bigtbl AS SELECT i%2 AS small_key, i%10 AS medium_key, i AS val FROM range(10000) t(i) ORDER BY small_key, medium_key
+
+statement ok
+CREATE TABLE smalltbl AS SELECT i small_key FROM range(2) t(i)
+
+statement ok
+CREATE TABLE mediumtbl AS SELECT i medium_key FROM range(10) t(i)
+
+query I
+SELECT COUNT(*) FROM bigtbl JOIN smalltbl USING (small_key) JOIN mediumtbl USING (medium_key)
+----
+10000
+
+# individual filters
+query I
+SELECT COUNT(*) FROM bigtbl JOIN (FROM smalltbl WHERE small_key=1) smalltbl USING (small_key) JOIN mediumtbl USING (medium_key)
+----
+5000
+
+query I
+SELECT COUNT(*) FROM bigtbl JOIN smalltbl USING (small_key) JOIN (FROM mediumtbl WHERE medium_key=1) mediumtbl USING (medium_key)
+----
+1000
+
+# double filter
+query I
+SELECT COUNT(*) FROM bigtbl JOIN (FROM smalltbl WHERE small_key=1) smalltbl USING (small_key) JOIN (FROM mediumtbl WHERE medium_key=1) mediumtbl USING (medium_key)
+----
+1000
+
+# double filter
+query I
+SELECT COUNT(*) FROM bigtbl JOIN (FROM smalltbl WHERE small_key=1) smalltbl USING (small_key) JOIN (FROM mediumtbl WHERE medium_key=1) mediumtbl ON (mediumtbl.medium_key=smalltbl.small_key)
+----
+5000