**Usage**
Postgres, MySQL, and Oracle support the expression `LEFT JOIN ... ON 1 = 1`, but ClickHouse does not.

It may be possible to replace `LEFT JOIN ... ON 1 = 1` with `CROSS JOIN`, but I want to use the query in the same form for lots of databases.

Please support the expression `LEFT JOIN ... ON 1 = 1`.


**Detailed SQL**
```SQL
CREATE TABLE test
(
    `name` Nullable(String),
    `id` int
)
ENGINE = Log();

insert into test values ('a', 1) ('b', 2) (null, 3);

select * from test t1 left join (select * from test ) t2 on 1 = 1   
-- DB::Exception: Not equi-join ON expression: 1 = 1. No columns in one of equality side.: While processing 1 = 1.
```

{
    if (const auto it = renames.find(name); it != renames.end())
        return it->second;
    return name;
}
void TableJoin::addKey(const String & left_name, const String & right_name, const ASTPtr & left_ast, const ASTPtr & right_ast)
{
    clauses.back().key_names_left.emplace_back(left_name);
    key_asts_left.emplace_back(left_ast);
    clauses.back().key_names_right.emplace_back(right_name);
    key_asts_right.emplace_back(right_ast ? right_ast : left_ast);
}
static void addJoinConditionWithAnd(ASTPtr & current_cond, const ASTPtr & new_cond)
{
    if (current_cond == nullptr)
        
        current_cond = new_cond;
    else if (const auto * func = current_cond->as<ASTFunction>(); func && func->name == "and")
        
        func->arguments->children.push_back(new_cond);
    else
        
        current_cond = makeASTFunction("and", current_cond, new_cond);
}
void TableJoin::addJoinCondition(const ASTPtr & ast, bool is_left)