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'。
{
    bool optimize_sharding_key_aggregation =
        settings.optimize_skip_unused_shards &&
        settings.optimize_distributed_group_by_sharding_key &&
        has_sharding_key &&
        (settings.allow_nondeterministic_optimize_skip_unused_shards || sharding_key_is_deterministic);
    QueryProcessingStage::Enum default_stage = QueryProcessingStage::WithMergeableStateAfterAggregation;
    if (settings.distributed_push_down_limit)
        default_stage = QueryProcessingStage::WithMergeableStateAfterAggregationAndLimit;
    const auto & select = query_info.query->as<ASTSelectQuery &>();
    auto expr_contains_sharding_key = [&](const auto & exprs) -> bool
    {
        std::unordered_set<std::string> expr_columns;
        for (auto & expr : exprs)
        {
            auto id = expr->template as<ASTIdentifier>();
            if (!id)
                continue;
            expr_columns.emplace(id->name());
        }
        for (const auto & column : sharding_key_expr->getRequiredColumns())
        {
            if (!expr_columns.contains(column))