1 files changed, 39 insertions, 0 deletions
diff --git a/src/test/regress/sql/alter_table.sql b/src/test/regress/sql/alter_table.sql
index a16e4c9a293..3801f19c58e 100644
--- a/src/test/regress/sql/alter_table.sql
+++ b/src/test/regress/sql/alter_table.sql
@@ -2801,3 +2801,42 @@ alter table at_test_sql_partop attach partition at_test_sql_partop_1 for values
 drop table at_test_sql_partop;
 drop operator class at_test_sql_partop using btree;
 drop function at_test_sql_partop;
+
+
+/* Test case for bug #16242 */
+
+-- We create a parent and child where the child has missing
+-- non-null attribute values, and arrange to pass them through
+-- tuple conversion from the child to the parent tupdesc
+create table bar1 (a integer, b integer not null default 1)
+  partition by range (a);
+create table bar2 (a integer);
+insert into bar2 values (1);
+alter table bar2 add column b integer not null default 1;
+-- (at this point bar2 contains tuple with natts=1)
+alter table bar1 attach partition bar2 default;
+
+-- this works:
+select * from bar1;
+
+-- this exercises tuple conversion:
+create function xtrig()
+  returns trigger language plpgsql
+as $$
+  declare
+    r record;
+  begin
+    for r in select * from old loop
+      raise info 'a=%, b=%', r.a, r.b;
+    end loop;
+    return NULL;
+  end;
+$$;
+create trigger xtrig
+  after update on bar1
+  referencing old table as old
+  for each statement execute procedure xtrig();
+
+update bar1 set a = a + 1;
+
+/* End test case for bug #16242 */