1 files changed, 59 insertions, 0 deletions
diff --git a/src/test/regress/sql/join.sql b/src/test/regress/sql/join.sql
index fdd4e78cf28..0358d00e404 100644
--- a/src/test/regress/sql/join.sql
+++ b/src/test/regress/sql/join.sql
@@ -1134,6 +1134,65 @@ select * from
   lateral (select i8.q1, t2.f1 from text_tbl t2 limit 1) as ss
 where t1.f1 = ss.f1;
 
+explain (verbose, costs off)
+select * from
+  text_tbl t1
+  left join int8_tbl i8
+  on i8.q2 = 123,
+  lateral (select i8.q1, t2.f1 from text_tbl t2 limit 1) as ss1,
+  lateral (select ss1.* from text_tbl t3 limit 1) as ss2
+where t1.f1 = ss2.f1;
+
+select * from
+  text_tbl t1
+  left join int8_tbl i8
+  on i8.q2 = 123,
+  lateral (select i8.q1, t2.f1 from text_tbl t2 limit 1) as ss1,
+  lateral (select ss1.* from text_tbl t3 limit 1) as ss2
+where t1.f1 = ss2.f1;
+
+explain (verbose, costs off)
+select 1 from
+  text_tbl as tt1
+  inner join text_tbl as tt2 on (tt1.f1 = 'foo')
+  left join text_tbl as tt3 on (tt3.f1 = 'foo')
+  left join text_tbl as tt4 on (tt3.f1 = tt4.f1),
+  lateral (select tt4.f1 as c0 from text_tbl as tt5 limit 1) as ss1
+where tt1.f1 = ss1.c0;
+
+select 1 from
+  text_tbl as tt1
+  inner join text_tbl as tt2 on (tt1.f1 = 'foo')
+  left join text_tbl as tt3 on (tt3.f1 = 'foo')
+  left join text_tbl as tt4 on (tt3.f1 = tt4.f1),
+  lateral (select tt4.f1 as c0 from text_tbl as tt5 limit 1) as ss1
+where tt1.f1 = ss1.c0;
+
+--
+-- check a case in which a PlaceHolderVar forces join order
+--
+
+explain (verbose, costs off)
+select ss2.* from
+  int4_tbl i41
+  left join int8_tbl i8
+    join (select i42.f1 as c1, i43.f1 as c2, 42 as c3
+          from int4_tbl i42, int4_tbl i43) ss1
+    on i8.q1 = ss1.c2
+  on i41.f1 = ss1.c1,
+  lateral (select i41.*, i8.*, ss1.* from text_tbl limit 1) ss2
+where ss1.c2 = 0;
+
+select ss2.* from
+  int4_tbl i41
+  left join int8_tbl i8
+    join (select i42.f1 as c1, i43.f1 as c2, 42 as c3
+          from int4_tbl i42, int4_tbl i43) ss1
+    on i8.q1 = ss1.c2
+  on i41.f1 = ss1.c1,
+  lateral (select i41.*, i8.*, ss1.* from text_tbl limit 1) ss2
+where ss1.c2 = 0;
+
 --
 -- test ability to push constants through outer join clauses
 --