fix: fix group by cube with join panic assert (#15515)

fix: fix group by bug

Co-authored-by: Bohu <overred.shuttler@gmail.com>

Author: lichuang

src/query/sql/src/executor/physical_plans/physical_aggregate_expand.rs

@@ -52,7 +52,7 @@ impl AggregateExpand {
             // All group by columns will wrap nullable.
             let i = input_schema.index_of(&group_by.to_string())?;
             let f = &mut output_fields[i];
-            debug_assert_eq!(f.data_type(), ty);
+            debug_assert!(f.data_type() == ty || f.data_type().wrap_nullable() == *ty);
             *f = DataField::new(f.name(), f.data_type().wrap_nullable());
             let new_field = DataField::new(&actual.to_string(), ty.clone());
             output_fields.push(new_field);

tests/sqllogictests/suites/base/issues/issue_14500.test

@@ -0,0 +1,24 @@
+statement ok
+drop table if exists tt1;
+
+statement ok
+drop table if exists tt2;
+
+statement ok
+create table tt1(a bool not null, b bitmap not null, c int not null);
+
+statement ok
+create table tt2(a bool not null, b bitmap not null, c int not null);
+
+statement ok
+insert into tt1 values (true, '1,2', 1),(true, '1,2,3', 2);
+
+statement ok
+insert into tt2 values (true, '1,2', 1),(true, '1,2,3', 2);
+
+query I
+select tt1.c from tt1 right outer join tt2 using(b) where tt1.a group by cube(tt1.c) order by c;
+----
+1
+2
+NULL