add setting

src/Core/Settings.cpp

@@ -2863,6 +2863,9 @@ Possible values:
 **See Also**
 
 - [ORDER BY Clause](../../sql-reference/statements/select/order-by.md/#optimize_read_in_order)
+)", 0) \
+    DECLARE(Bool, read_in_order_use_virtual_row, false, R"(
+Use virtual row while reading in order of primary key or its monotonic function fashion. It is useful when searching over multiple parts as only relevant ones are touched.
 )", 0) \
     DECLARE(Bool, optimize_read_in_window_order, true, R"(
 Enable ORDER BY optimization in window clause for reading data in corresponding order in MergeTree tables.

src/Core/SettingsChangesHistory.cpp

@@ -64,6 +64,7 @@ static std::initializer_list<std::pair<ClickHouseVersion, SettingsChangesHistory
     },
     {"24.11",
         {
+            {"read_in_order_use_virtual_row", false, false, "Use virtual row while reading in order of primary key or its monotonic function fashion. It is useful when searching over multiple parts as only relevant ones are touched."},
         }
     },
     {"24.10",

src/Processors/QueryPlan/ReadFromMergeTree.cpp

@@ -177,6 +177,7 @@ namespace Setting
     extern const SettingsBool use_skip_indexes_if_final;
     extern const SettingsBool use_uncompressed_cache;
     extern const SettingsUInt64 merge_tree_min_read_task_size;
+    extern const SettingsBool read_in_order_use_virtual_row;
 }
 
 namespace MergeTreeSetting
@@ -1852,7 +1853,7 @@ bool ReadFromMergeTree::requestReadingInOrder(size_t prefix_size, int direction,
     enable_vertical_final = false;
 
     /// Disable virtual row for FINAL.
-    if (virtual_row_conversion_ && !isQueryWithFinal())
+    if (virtual_row_conversion_ && !isQueryWithFinal() && context->getSettingsRef()[Setting::read_in_order_use_virtual_row])
         virtual_row_conversion = std::make_shared<ExpressionActions>(std::move(*virtual_row_conversion_));
 
     updateSortDescription();

tests/queries/0_stateless/01786_explain_merge_tree.sh

@@ -7,7 +7,7 @@ CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
 
 for i in $(seq 0 1)
 do
-    CH_CLIENT="$CLICKHOUSE_CLIENT --optimize_move_to_prewhere=1 --convert_query_to_cnf=0 --optimize_read_in_order=1 --enable_analyzer=$i"
+    CH_CLIENT="$CLICKHOUSE_CLIENT --optimize_move_to_prewhere=1 --convert_query_to_cnf=0 --optimize_read_in_order=1 --read_in_order_use_virtual_row=1 --enable_analyzer=$i"
 
     $CH_CLIENT -q "drop table if exists test_index"
     $CH_CLIENT -q "drop table if exists idx"

tests/queries/0_stateless/02149_read_in_order_fixed_prefix.sql

@@ -2,6 +2,7 @@ SET max_threads=0;
 SET optimize_read_in_order=1;
 SET optimize_trivial_insert_select = 1;
 SET read_in_order_two_level_merge_threshold=100;
+SET read_in_order_use_virtual_row = 1;
 
 DROP TABLE IF EXISTS t_read_in_order;
 

tests/queries/0_stateless/03031_read_in_order_optimization_with_virtual_row.sql

@@ -1,4 +1,6 @@
 
+SET read_in_order_use_virtual_row = 1;
+
 DROP TABLE IF EXISTS t;
 
 CREATE TABLE t

tests/queries/0_stateless/03031_read_in_order_optimization_with_virtual_row_explain.sql

@@ -1,6 +1,6 @@
 -- Tags: no-random-merge-tree-settings, no-object-storage
 
-SET optimize_read_in_order = 1, merge_tree_min_rows_for_concurrent_read = 1000;
+SET optimize_read_in_order = 1, merge_tree_min_rows_for_concurrent_read = 1000, read_in_order_use_virtual_row = 1;
 
 DROP TABLE IF EXISTS tab;
 

tests/queries/0_stateless/03031_read_in_order_optimization_with_virtual_row_special.sql

@@ -7,6 +7,8 @@ CREATE DATABASE test_03031;
 
 USE test_03031;
 
+SET read_in_order_use_virtual_row = 1;
+
 CREATE TABLE src (s String) ENGINE = MergeTree() ORDER BY s;
 INSERT INTO src(s) VALUES ('before moving tables');
 CREATE TABLE dist (s String) ENGINE = Distributed(test_shard_localhost, test_03031, src);