**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.
```

{
            switch (which)
            {
                case Type::EMPTY:            return 0;
                case Type::CROSS:            return 0;
                case Type::DICT:             return 0;
            #define M(NAME) \
                case Type::NAME: return NAME ? NAME->getBufferSizeInBytes() : 0;
                APPLY_FOR_JOIN_VARIANTS(M)
            #undef M
            }
            __builtin_unreachable();
        }
        size_t getBufferSizeInCells(Type which) const
        {
            switch (which)
            {
                case Type::EMPTY:            return 0;
                case Type::CROSS:            return 0;
                case Type::DICT:             return 0;
            #define M(NAME) \
                case Type::NAME: return NAME ? NAME->getBufferSizeInCells() : 0;
                APPLY_FOR_JOIN_VARIANTS(M)
            #undef M