And waits for them. That's pointless.
const Names & column_names,
    const StorageMetadataPtr & metadata_snapshot,
    SelectQueryInfo & query_info,
    ContextPtr local_context,
    QueryProcessingStage::Enum processed_stage,
    const size_t max_block_size,
    const unsigned num_streams)
{
    QueryPlan plan;
    read(plan, column_names, metadata_snapshot, query_info, local_context, processed_stage, max_block_size, num_streams);
    return plan.convertToPipe(
        QueryPlanOptimizationSettings::fromContext(local_context),
        BuildQueryPipelineSettings::fromContext(local_context));
}
template <class Func>
void StorageReplicatedMergeTree::foreachCommittedParts(Func && func, bool select_sequential_consistency) const