Natural Join Column Qualification Conflict

[Lordworms]

Describe the bug

Bug where NATURAL JOIN rejects source table column qualifiers in ORDER BY clause.

To Reproduce

(base) ➜  ~ echo '"id","name","stuff"
1,"aaa",2
2,"bbb",1
3,"cc",1
4,"d",2' > test1.csv
(base) ➜  ~ datafusion-cli
DataFusion CLI v43.0.0
> CREATE EXTERNAL TABLE server
STORED AS CSV
LOCATION 'test1.csv';
0 row(s) fetched.
Elapsed 0.037 seconds.

> create table client(id int, name string, stuff int);
0 row(s) fetched.
Elapsed 0.007 seconds.

> select * from server;
+----+------+-------+
| id | name | stuff |
+----+------+-------+
| 1  | aaa  | 2     |
| 2  | bbb  | 1     |
| 3  | cc   | 1     |
| 4  | d    | 2     |
+----+------+-------+
4 row(s) fetched.
Elapsed 0.021 seconds.

> create table client(id int, name string, stuff int);
Execution error: Table 'client' already exists
> SELECT * FROM server NATURAL JOIN client AS client ORDER BY server.id;
Schema error: No field named server.id. Valid fields are client.id, client.name, client.stuff.

Expected behavior

DataFusion CLI v41.0.0
> CREATE EXTERNAL TABLE server(id int, name string, stuff int)
STORED AS CSV
LOCATION 'test1.csv';
0 row(s) fetched. 
Elapsed 0.005 seconds.

> create table client(id int, name string, stuff int);
0 row(s) fetched. 
Elapsed 0.005 seconds.

> SELECT * FROM server NATURAL JOIN client AS client ORDER BY server.id;
+----+------+-------+
| id | name | stuff |
+----+------+-------+
+----+------+-------+
0 row(s) fetched. 
Elapsed 0.020 seconds.

Additional context

No response

[Lordworms]

take

[findepi]

> SELECT * FROM server NATURAL JOIN client AS client ORDER BY server.id;
Schema error: No field named server.id. Valid fields are client.id, client.name, client.stuff.

This is actually correct per SQL spec. NATURAL JOIN is a shorthand for USING and when using USING, the join condition columns are deduplicated and lose original qualification.

In DataFusion dialect of SQL we probably want to support this though, because PostgreSQL supports it

postgres=# create table client(id int, name varchar, stuff int);
CREATE TABLE
postgres=# create table server(id int, name varchar, stuff int);
CREATE TABLE
postgres=# SELECT * FROM server NATURAL JOIN client AS client ORDER BY server.id;
 id | name | stuff
----+------+-------
(0 rows)

... while still deduplicating columns on the output (id and other join columns appear only once)