ClickHouse v.21.7.7.47

setting max_memory_usage doesnt work for 'create table .. as' queries

for example:
**this query works**
`create table test_table engine MergeTree order by a as
select a_table.a, b_table.b_arr
from (select arrayJoin(range(10000)) as a) a_table
         cross join (select range(10000) as b_arr) b_table
    settings max_memory_usage = 1;`

**this query doesnt work**
`insert into test_table
select a_table.a, b_table.b_arr
from (select arrayJoin(range(10000)) as a) a_table
         cross join (select range(10000) as b_arr) b_table
    settings max_memory_usage = 1;`
With error:
`DB::Exception: Memory limit (for query) exceeded: would use 4.09 MiB`

**Expected behavior**
**this query should NOT work, and setting max_memory_usage should work for all 'select'\'insert'\'create table' queries**
`create table test_table engine MergeTree order by a as
select a_table.a, b_table.b_arr
from (select arrayJoin(range(10000)) as a) a_table
         cross join (select range(10000) as b_arr) b_table
    settings max_memory_usage = 1;`
{
    try
    {
        if (streams.out)
            throw Exception(ErrorCodes::LOGICAL_ERROR, "Query stream requires input, but no input buffer provided, it's a bug");
        if (streams.in)
            throw Exception(ErrorCodes::LOGICAL_ERROR, "Query stream requires output, but no output buffer provided, it's a bug");
        if (!streams.pipeline.initialized())
            return;
        if (!streams.pipeline.isCompleted())
            throw Exception(ErrorCodes::LOGICAL_ERROR, "Query pipeline requires output, but no output buffer provided, it's a bug");
        streams.pipeline.setProgressCallback(context->getProgressCallback());
        auto executor = streams.pipeline.execute();
        executor->execute(streams.pipeline.getNumThreads());
    }
    catch (...)
    {
        streams.onException();
        throw;
    }
    streams.onFinish();
}
}