One of the customers reported that, on the MariaDB columnstore 10.5.5. The simple SELECT query error as "ERROR 1815 (HY000): Internal error: IDB-1000: '<tablename>' and '<tablename>' are not joined."

It is observed that if a database name is upper cased, and a table created in that database simple SELECT throws above noted error.

Repro step:

MariaDB [(none)]> create database SURESH;
Query OK, 1 row affected (0.002 sec)

MariaDB [(none)]> use SURESH
Database changed

MariaDB [SURESH]> create table foo (a int) engine=columnstore;
Query OK, 0 rows affected (0.325 sec)

MariaDB [SURESH]> select * from foo;
ERROR 1815 (HY000): Internal error: IDB-1000: 'foo' and 'foo' are not joined.
MariaDB [SURESH]> select @@version;
----------------

----------------

----------------
1 row in set (0.000 sec)

Thank You.