**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.
```

Block & block,
    const Block & block_with_columns_to_add,
    const std::vector<const Maps *> & maps_,
    bool is_join_get) const
{
    constexpr JoinFeatures<KIND, STRICTNESS> jf;
    std::vector<JoinOnKeyColumns> join_on_keys;
    const auto & onexprs = table_join->getClauses();
    for (size_t i = 0; i < onexprs.size(); ++i)
    {
        const auto & key_names = !is_join_get ? onexprs[i].key_names_left : onexprs[i].key_names_right;
        join_on_keys.emplace_back(block, key_names, onexprs[i].condColumnNames().first, key_sizes[i]);
    }
    size_t existing_columns = block.columns();
    /** If you use FULL or RIGHT JOIN, then the columns from the "left" table must be materialized.
      * Because if they are constants, then in the "not joined" rows, they may have different values
      *  - default values, which can differ from the values of these constants.
      */
    if constexpr (jf.right || jf.full)
    {
        materializeBlockInplace(block);
        if (nullable_left_side)
            JoinCommon::convertColumnsToNullable(block);
    }
    /** For LEFT/INNER JOIN, the saved blocks do not contain keys.