ClickHouse/tests/queries/0_stateless/02404_memory_bound_merging.reference

-- { echoOn } --
explain pipeline select a from remote(test_cluster_two_shards, currentDatabase(), t) group by a;
(Expression)
ExpressionTransform × 4
  (MergingAggregated)
  MergingAggregatedBucketTransform × 4
    Resize 1 → 4
      FinishAggregatingInOrderTransform 2 → 1
        (Union)
          (Aggregating)
          SortingAggregatedForMemoryBoundMergingTransform 4 → 1
            MergingAggregatedBucketTransform × 4
              Resize 1 → 4
                FinishAggregatingInOrderTransform 4 → 1
                  AggregatingInOrderTransform × 4
                    (Expression)
                    ExpressionTransform × 4
                      (ReadFromMergeTree)
                      MergeTreeSelect(pool: ReadPoolInOrder, algorithm: InOrder) × 4 0 → 1
          (ReadFromRemote)
select a from remote(test_cluster_two_shards, currentDatabase(), t) group by a order by a limit 5 offset 100500;
100500
100501
100502
100503
100504
explain pipeline select a from remote(test_cluster_two_shards, currentDatabase(), dist_t) group by a;
(Expression)
ExpressionTransform × 4
  (MergingAggregated)
  MergingAggregatedBucketTransform × 4
    Resize 1 → 4
      FinishAggregatingInOrderTransform 2 → 1
        (Union)
          (MergingAggregated)
          SortingAggregatedForMemoryBoundMergingTransform 4 → 1
            MergingAggregatedBucketTransform × 4
              Resize 1 → 4
                FinishAggregatingInOrderTransform 2 → 1
                  (Union)
                    (Aggregating)
                    SortingAggregatedForMemoryBoundMergingTransform 4 → 1
                      MergingAggregatedBucketTransform × 4
                        Resize 1 → 4
                          FinishAggregatingInOrderTransform 4 → 1
                            AggregatingInOrderTransform × 4
                              (Expression)
                              ExpressionTransform × 4
                                (ReadFromMergeTree)
                                MergeTreeSelect(pool: ReadPoolInOrder, algorithm: InOrder) × 4 0 → 1
                    (ReadFromRemote)
          (ReadFromRemote)
select a from remote(test_cluster_two_shards, currentDatabase(), dist_t) group by a order by a limit 5 offset 100500;
100500
100501
100502
100503
100504
1
-- { echoOn } --
explain pipeline select a, count() from dist_t_different_dbs group by a order by a limit 5 offset 500;
(Expression)
ExpressionTransform
  (Limit)
  Limit
    (Sorting)
    MergingSortedTransform 4 → 1
      MergeSortingTransform × 4
        LimitsCheckingTransform × 4
          PartialSortingTransform × 4
            (Expression)
            ExpressionTransform × 4
              (MergingAggregated)
              MergingAggregatedBucketTransform × 4
                Resize 1 → 4
                  FinishAggregatingInOrderTransform 2 → 1
                    (Union)
                      (Aggregating)
                      SortingAggregatedForMemoryBoundMergingTransform 4 → 1
                        MergingAggregatedBucketTransform × 4
                          Resize 1 → 4
                            FinishAggregatingInOrderTransform 4 → 1
                              AggregatingInOrderTransform × 4
                                (Expression)
                                ExpressionTransform × 4
                                  (ReadFromMergeTree)
                                  MergeTreeSelect(pool: ReadPoolInOrder, algorithm: InOrder) × 4 0 → 1
                      (ReadFromRemote)
select a, count() from dist_t_different_dbs group by a order by a limit 5 offset 500;
500	2000
501	2000
502	2000
503	2000
504	2000
select a, count() from dist_t_different_dbs group by a, b order by a limit 5 offset 500;
500	2000
501	2000
502	2000
503	2000
504	2000
1000000
-- { echoOn } --
explain pipeline select a from pr_t group by a order by a limit 5 offset 500;
(Expression)
ExpressionTransform
  (Limit)
  Limit
    (Sorting)
    MergingSortedTransform 4 → 1
      MergeSortingTransform × 4
        LimitsCheckingTransform × 4
          PartialSortingTransform × 4
            (Expression)
            ExpressionTransform × 4
              (MergingAggregated)
              Resize 1 → 4
                SortingAggregatedTransform 4 → 1
                  MergingAggregatedBucketTransform × 4
                    Resize 1 → 4
                      GroupingAggregatedTransform 3 → 1
                        (ReadFromRemoteParallelReplicas)
select a, count() from pr_t group by a order by a limit 5 offset 500;
500	1000
501	1000
502	1000
503	1000
504	1000
select a, count() from pr_t group by a, b order by a limit 5 offset 500;
500	1000
501	1000
502	1000
503	1000
504	1000