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'。
{
    auto first_remote_table = getFirstTable([](const StoragePtr & table) { return table && table->isRemote(); });
    return first_remote_table != nullptr;
}
bool StorageMerge::mayBenefitFromIndexForIn(const ASTPtr & left_in_operand, ContextPtr query_context, const StorageMetadataPtr & ) const
{
    
    StorageListWithLocks selected_tables = getSelectedTables(query_context);
    size_t i = 0;
    for (const auto & table : selected_tables)
    {
        const auto & storage_ptr = std::get<1>(table);
        auto metadata_snapshot = storage_ptr->getInMemoryMetadataPtr();
        if (storage_ptr->mayBenefitFromIndexForIn(left_in_operand, query_context, metadata_snapshot))
            return true;
        ++i;
        
        if (i > 10)
            break;
    }
    return false;
}
QueryProcessingStage::Enum StorageMerge::getQueryProcessingStage(