(select unique1 from tenk1 b join tenk1 c using (unique1)
where b.unique2 = 42);
+--
+-- regression test: check for failure to generate a plan with multiple
+-- degenerate IN clauses
+--
+select count(*) from tenk1 x where
+ x.unique1 in (select a.f1 from int4_tbl a,float8_tbl b where a.f1=b.f1) and
+ x.unique1 = 0 and
+ x.unique1 in (select aa.f1 from int4_tbl aa,float8_tbl bb where aa.f1=bb.f1);
+
--
-- Clean up