diff --git a/src/Storages/MergeTree/MergeTreeSelectProcessor.cpp b/src/Storages/MergeTree/MergeTreeSelectProcessor.cpp
index 4bb4799f396..f849bfff1e9 100644
--- a/src/Storages/MergeTree/MergeTreeSelectProcessor.cpp
+++ b/src/Storages/MergeTree/MergeTreeSelectProcessor.cpp
@@ -7,11 +7,6 @@
 namespace DB
 {
 
-namespace ErrorCodes
-{
-    extern const int MEMORY_LIMIT_EXCEEDED;
-}
-
 MergeTreeSelectProcessor::MergeTreeSelectProcessor(
     const MergeTreeData & storage_,
     const StorageMetadataPtr & metadata_snapshot_,
diff --git a/tests/queries/0_stateless/01551_mergetree_read_in_order_spread.reference b/tests/queries/0_stateless/01551_mergetree_read_in_order_spread.reference
index 2843b305f0a..cdc595a3c57 100644
--- a/tests/queries/0_stateless/01551_mergetree_read_in_order_spread.reference
+++ b/tests/queries/0_stateless/01551_mergetree_read_in_order_spread.reference
@@ -9,9 +9,9 @@ ExpressionTransform
           (SettingQuotaAndLimits)
             (ReadFromMergeTree)
             ExpressionTransform × 4
-              MergeTree 0 → 1
+              MergeTreeInOrder 0 → 1
                 MergingSortedTransform 2 → 1
                   ExpressionTransform × 2
-                    MergeTree × 2 0 → 1
+                    MergeTreeInOrder × 2 0 → 1
                       ExpressionTransform
-                        MergeTree 0 → 1
+                        MergeTreeInOrder 0 → 1
diff --git a/tests/queries/0_stateless/01861_explain_pipeline.reference b/tests/queries/0_stateless/01861_explain_pipeline.reference
index 9d62fb9f6b8..63ba55f5a04 100644
--- a/tests/queries/0_stateless/01861_explain_pipeline.reference
+++ b/tests/queries/0_stateless/01861_explain_pipeline.reference
@@ -5,7 +5,7 @@ ExpressionTransform
     ExpressionTransform
       ReplacingSorted 2 → 1
         ExpressionTransform × 2
-          MergeTree × 2 0 → 1
+          MergeTreeInOrder × 2 0 → 1
 0	0
 1	1
 2	2
@@ -22,4 +22,4 @@ ExpressionTransform × 2
         Copy × 2 1 → 2
           AddingSelector × 2
             ExpressionTransform × 2
-              MergeTree × 2 0 → 1
+              MergeTreeInOrder × 2 0 → 1