If name of key column equals in both tables in Storage Join `JOIN ON` trows an error:

```
:) CREATE TABLE t1 (x String) ENGINE = TinyLog;

:) CREATE TABLE t2 (x String) ENGINE = Join(ALL, INNER, x);

:) select * from t1 join t2 USING(x);

Ok.

0 rows in set. Elapsed: 0.036 sec.

:) select * from t1 join t2 ON (t1.x == t2.x);

0 rows in set. Elapsed: 0.026 sec.

Received exception from server (version 21.3.1):
Code: 8. DB::Exception: Received from localhost:9000. DB::Exception: Cannot find column `t2.x` in source stream.

```

If secondary column name match we tables cannot be joined with `USING` too:

```
:) CREATE TABLE t1 (x String, y String) ENGINE = TinyLog;

:) CREATE TABLE t2 (x String, y String) ENGINE = Join(ALL, INNER, x);

:) select * from t1 join t2 USING(x);


0 rows in set. Elapsed: 0.027 sec.

Received exception from server (version 21.3.1):
Code: 8. DB::Exception: Received from localhost:9000. DB::Exception: Cannot find column `t2.y` in source stream.

```
{
    ASTPtr keys_list = std::make_shared<ASTExpressionList>();
    keys_list->children = key_asts_left;
    return keys_list;
}
ASTPtr TableJoin::rightKeysList() const
{
    ASTPtr keys_list = std::make_shared<ASTExpressionList>();
    if (hasOn())
        keys_list->children = key_asts_right;
    return keys_list;
}
Names TableJoin::requiredJoinedNames() const
{
    NameSet required_columns_set(key_names_right.begin(), key_names_right.end());
    for (const auto & joined_column : columns_added_by_join)
        required_columns_set.insert(joined_column.name);
    return Names(required_columns_set.begin(), required_columns_set.end());
}
NameSet TableJoin::requiredRightKeys() const
{
    NameSet required;
    for (const auto & name : key_names_right)
        for (const auto & column : columns_added_by_join)
            if (name == column.name)
                required.insert(name);
    return required;
}
NamesWithAliases TableJoin::getRequiredColumns(const Block & sample, const Names & action_required_columns) const