**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.
```

const Block & result_sample_block_,
                     size_t left_columns_count,
                     const LeftToRightKeyRemap & left_to_right_key_remap)
    : filler(std::move(filler_))
    , saved_block_sample(filler->getEmptyBlock())
    , result_sample_block(materializeBlock(result_sample_block_))
{
    for (size_t left_pos = 0; left_pos < left_columns_count; ++left_pos)
    {
        
        auto left_name = result_sample_block.getByPosition(left_pos).name;
        const auto & right_key = left_to_right_key_remap.find(left_name);
        if (right_key != left_to_right_key_remap.end())
        {
            size_t right_key_pos = saved_block_sample.getPositionByName(right_key->second);
            setRightIndex(right_key_pos, left_pos);
        }
        else
            column_indices_left.emplace_back(left_pos);
    }
    for (size_t right_pos = 0; right_pos < saved_block_sample.columns(); ++right_pos)
    {
        const String & name = saved_block_sample.getByPosition(right_pos).name;
        if (!result_sample_block.has(name))
            continue;
        size_t result_position = result_sample_block.getPositionByName(name);
        
        if (result_position < left_columns_count)