Change the table comment after created the table is not supported now?
Like mysql : ALTER TABLE [tableName] COMMNET [comment]; 
The sql "ALTER TABLE `system`.tables UPDATE Comment='test' WHERE NAME='t1';" also not supported!!!
My version is '21.9.4.35'。
const AlterCommands & params, ContextPtr local_context, AlterLockHolder &)
{
    auto table_id = getStorageID();
    StorageInMemoryMetadata storage_metadata = getInMemoryMetadata();
    params.apply(storage_metadata, local_context);
    DatabaseCatalog::instance().getDatabase(table_id.database_name)->alterTable(local_context, table_id, storage_metadata);
    setInMemoryMetadata(storage_metadata);
}
void StorageMerge::convertingSourceStream(