From 453f8ca888bd09fbb276039c18adf038ebd39834 Mon Sep 17 00:00:00 2001
From: "Lei, HUANG" <6406592+v0y4g3r@users.noreply.github.com>
Date: Tue, 20 Oct 2026 10:05:09 -0700
Subject: [PATCH] fix: backport disabling v2 series scan by default to
 release/5e02efa9 (#9784)

fix: temporarily disable v2 series scan by default (#9436)

* fix: disable v2 series scan by default temporarily



* test: explicitly enable v2 series scan in sqlness configs



* test: regenerate sqlness results for legacy series scan default



---------


(cherry picked from commit 3a4c24a863d3628d847b4aa054eae5ab78960350)

Signed-off-by: evenyag <realevenyag@gmail.com>
Signed-off-by: Lei, HUANG <ratuthomm@gmail.com>
Co-authored-by: Yingwen <realevenyag@gmail.com>
---
 config/config.md                              |  4 +-
 config/datanode.example.toml                  |  2 +-
 config/standalone.example.toml                |  2 +-
 src/mito2/src/config.rs                       | 11 +---
 tests-integration/tests/http.rs               |  2 +-
 .../promql/tsid_binary_join_regression.result | 56 +++++++++----------
 .../tsid_histogram_quantile_regression.result |  2 +-
 .../tql-explain-analyze/tsid_column.result    | 12 ++--
 8 files changed, 42 insertions(+), 49 deletions(-)

diff --git a/config/config.md b/config/config.md
index 5879685e616..e4360f674be 100644
--- a/config/config.md
+++ b/config/config.md
@@ -196,7 +196,7 @@
 | `region_engine.mito.min_compaction_interval` | String | `0m` | Minimum time interval between two compactions.<br/>To align with the old behavior, the default value is 0 (no restrictions). |
 | `region_engine.mito.schedule_compaction_after_edit` | Bool | `true` | Whether to allow to schedule a compaction after a successful region edit.<br/><br/>Setting this to "true" is a necessary but not sufficient condition for scheduling compaction after a region edit.<br/>Other constraints, such as "min_compaction_interval", may still prevent compaction from being scheduled.<br/>Setting this to "false", however, guarantees that compaction will not be scheduled after a region edit. |
 | `region_engine.mito.default_flat_format` | Bool | `true` | Whether to enable flat format as the default SST format. |
-| `region_engine.mito.experimental_series_scan_v2` | Bool | `true` | Whether to enable the experimental two-phase mode for eligible metric series scans. |
+| `region_engine.mito.experimental_series_scan_v2` | Bool | `false` | Whether to enable the experimental two-phase mode for eligible metric series scans. |
 | `region_engine.mito.index` | -- | -- | The options for index in Mito engine. |
 | `region_engine.mito.index.aux_path` | String | `""` | Auxiliary directory path for the index in filesystem, used to store intermediate files for<br/>creating the index and staging files for searching the index, defaults to `{data_home}/index_intermediate`.<br/>The default name for this directory is `index_intermediate` for backward compatibility.<br/><br/>This path contains two subdirectories:<br/>- `__intm`: for storing intermediate files used during creating index.<br/>- `staging`: for storing staging files used during searching index. |
 | `region_engine.mito.index.staging_size` | String | `2GB` | The max capacity of the staging directory. |
@@ -648,7 +648,7 @@
 | `region_engine.mito.min_compaction_interval` | String | `0m` | Minimum time interval between two compactions.<br/>To align with the old behavior, the default value is 0 (no restrictions). |
 | `region_engine.mito.schedule_compaction_after_edit` | Bool | `true` | Whether to allow to schedule a compaction after a successful region edit.<br/><br/>Setting this to "true" is a necessary but not sufficient condition for scheduling compaction after a region edit.<br/>Other constraints, such as "min_compaction_interval", may still prevent compaction from being scheduled.<br/>Setting this to "false", however, guarantees that compaction will not be scheduled after a region edit. |
 | `region_engine.mito.default_flat_format` | Bool | `true` | Whether to enable flat format as the default SST format. |
-| `region_engine.mito.experimental_series_scan_v2` | Bool | `true` | Whether to enable the experimental two-phase mode for eligible metric series scans. |
+| `region_engine.mito.experimental_series_scan_v2` | Bool | `false` | Whether to enable the experimental two-phase mode for eligible metric series scans. |
 | `region_engine.mito.index` | -- | -- | The options for index in Mito engine. |
 | `region_engine.mito.index.aux_path` | String | `""` | Auxiliary directory path for the index in filesystem, used to store intermediate files for<br/>creating the index and staging files for searching the index, defaults to `{data_home}/index_intermediate`.<br/>The default name for this directory is `index_intermediate` for backward compatibility.<br/><br/>This path contains two subdirectories:<br/>- `__intm`: for storing intermediate files used during creating index.<br/>- `staging`: for storing staging files used during searching index. |
 | `region_engine.mito.index.staging_size` | String | `2GB` | The max capacity of the staging directory. |
diff --git a/config/datanode.example.toml b/config/datanode.example.toml
index d378d55cc2b..62b9a1b9a94 100644
--- a/config/datanode.example.toml
+++ b/config/datanode.example.toml
@@ -608,7 +608,7 @@ schedule_compaction_after_edit = true
 default_flat_format = true
 
 ## Whether to enable the experimental two-phase mode for eligible metric series scans.
-experimental_series_scan_v2 = true
+experimental_series_scan_v2 = false
 
 ## The options for index in Mito engine.
 [region_engine.mito.index]
diff --git a/config/standalone.example.toml b/config/standalone.example.toml
index b05cf0177d0..78ad987511f 100644
--- a/config/standalone.example.toml
+++ b/config/standalone.example.toml
@@ -769,7 +769,7 @@ schedule_compaction_after_edit = true
 default_flat_format = true
 
 ## Whether to enable the experimental two-phase mode for eligible metric series scans.
-experimental_series_scan_v2 = true
+experimental_series_scan_v2 = false
 
 ## The options for index in Mito engine.
 [region_engine.mito.index]
diff --git a/src/mito2/src/config.rs b/src/mito2/src/config.rs
index 21ecb266d9f..74cbd9d5e67 100644
--- a/src/mito2/src/config.rs
+++ b/src/mito2/src/config.rs
@@ -255,7 +255,8 @@ impl Default for MitoConfig {
             min_compaction_interval: Duration::from_secs(0),
             schedule_compaction_after_edit: true,
             default_flat_format: true,
-            experimental_series_scan_v2: true,
+            // FIXME(#9435): Keep v2 opt-in while long-range scan memory usage is investigated.
+            experimental_series_scan_v2: false,
             gc: GcConfig::default(),
         };
 
@@ -462,14 +463,6 @@ mod tests {
             MitoConfig::default().experimental_series_index_maintenance_interval
         );
     }
-
-    #[test]
-    fn test_experimental_series_scan_v2_config() {
-        assert!(MitoConfig::default().experimental_series_scan_v2);
-
-        let config: MitoConfig = toml::from_str("experimental_series_scan_v2 = false").unwrap();
-        assert!(!config.experimental_series_scan_v2);
-    }
 }
 
 /// Index build mode.
diff --git a/tests-integration/tests/http.rs b/tests-integration/tests/http.rs
index fb4b8ddb468..6abedd8d655 100644
--- a/tests-integration/tests/http.rs
+++ b/tests-integration/tests/http.rs
@@ -2512,7 +2512,7 @@ scan_memory_on_exhausted = "fail"
 min_compaction_interval = "0s"
 schedule_compaction_after_edit = true
 default_flat_format = true
-experimental_series_scan_v2 = true
+experimental_series_scan_v2 = false
 
 [region_engine.mito.index]
 aux_path = ""
diff --git a/tests/cases/standalone/common/promql/tsid_binary_join_regression.result b/tests/cases/standalone/common/promql/tsid_binary_join_regression.result
index a3983260e33..50ada0b982e 100644
--- a/tests/cases/standalone/common/promql/tsid_binary_join_regression.result
+++ b/tests/cases/standalone/common/promql/tsid_binary_join_regression.result
@@ -127,13 +127,13 @@ TQL ANALYZE (0, 5, '5s') tsid_binary_join_left / tsid_binary_join_right;
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 | 1_| 0_|_PromInstantManipulateExec: range=[0..5000], lookback=[300000], interval=[5000], time index=[ts] REDACTED
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 |_|_| Total rows: 4_|
 +-+-+-+
@@ -167,13 +167,13 @@ TQL ANALYZE (0, 5, '5s') (tsid_binary_join_left + tsid_binary_join_right) / tsid
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 | 1_| 0_|_PromInstantManipulateExec: range=[0..5000], lookback=[300000], interval=[5000], time index=[ts] REDACTED
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 |_|_| Total rows: 4_|
 +-+-+-+
@@ -210,19 +210,19 @@ TQL ANALYZE (0, 5, '5s') ((tsid_binary_join_left + tsid_binary_join_right) * (ts
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 | 1_| 0_|_PromInstantManipulateExec: range=[0..5000], lookback=[300000], interval=[5000], time index=[ts] REDACTED
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 | 1_| 0_|_PromInstantManipulateExec: range=[0..5000], lookback=[300000], interval=[5000], time index=[ts] REDACTED
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 |_|_| Total rows: 4_|
 +-+-+-+
@@ -255,13 +255,13 @@ TQL ANALYZE (0, 5, '5s') tsid_binary_join_left / ignoring(host) tsid_binary_join
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 | 1_| 0_|_PromInstantManipulateExec: range=[0..5000], lookback=[300000], interval=[5000], time index=[ts] REDACTED
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 |_|_| Total rows: 4_|
 +-+-+-+
@@ -294,13 +294,13 @@ TQL ANALYZE (0, 5, '5s') tsid_binary_join_left / on(job) tsid_binary_join_right_
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 | 1_| 0_|_PromInstantManipulateExec: range=[0..5000], lookback=[300000], interval=[5000], time index=[ts] REDACTED
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, job@3 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 |_|_| Total rows: 4_|
 +-+-+-+
@@ -334,13 +334,13 @@ TQL ANALYZE (0, 5, '5s') tsid_binary_join_left > tsid_binary_join_right;
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 | 1_| 0_|_PromInstantManipulateExec: range=[0..5000], lookback=[300000], interval=[5000], time index=[ts] REDACTED
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 |_|_| Total rows: 4_|
 +-+-+-+
@@ -373,13 +373,13 @@ TQL ANALYZE (0, 5, '5s') tsid_binary_join_left > bool tsid_binary_join_right;
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 | 1_| 0_|_PromInstantManipulateExec: range=[0..5000], lookback=[300000], interval=[5000], time index=[ts] REDACTED
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 |_|_| Total rows: 4_|
 +-+-+-+
@@ -418,19 +418,19 @@ TQL ANALYZE (0, 5, '5s') ((tsid_binary_join_left > tsid_binary_join_right) / tsi
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 | 1_| 0_|_PromInstantManipulateExec: range=[0..5000], lookback=[300000], interval=[5000], time index=[ts] REDACTED
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 | 1_| 0_|_PromInstantManipulateExec: range=[0..5000], lookback=[300000], interval=[5000], time index=[ts] REDACTED
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 |_|_| Total rows: 4_|
 +-+-+-+
@@ -473,25 +473,25 @@ TQL ANALYZE (0, 5, '5s') ((tsid_binary_join_left > bool tsid_binary_join_right)
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 | 1_| 0_|_PromInstantManipulateExec: range=[0..5000], lookback=[300000], interval=[5000], time index=[ts] REDACTED
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 | 1_| 0_|_PromInstantManipulateExec: range=[0..5000], lookback=[300000], interval=[5000], time index=[ts] REDACTED
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 | 1_| 0_|_PromInstantManipulateExec: range=[0..5000], lookback=[300000], interval=[5000], time index=[ts] REDACTED
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 |_|_| Total rows: 4_|
 +-+-+-+
@@ -529,7 +529,7 @@ TQL ANALYZE (0, 5, '5s') (tsid_binary_join_left or tsid_binary_join_right) / tsi
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 | 1_| 0_|_ProjectionExec: expr=[ts@2 as ts, __tsid@3 as __tsid, greptime_value@4 as greptime_value, host@5 as host, job@6 as job, CASE WHEN __common_expr_1@0 IS NOT NULL THEN __common_expr_1@0 ELSE_END as __promql_or_match_0, CASE WHEN __common_expr_2@1 IS NOT NULL THEN __common_expr_2@1 ELSE_END as __promql_or_match_1] REDACTED
 |_|_|_ProjectionExec: expr=[CAST(host@1 AS Utf8) as __common_expr_1, CAST(job@2 AS Utf8) as __common_expr_2, ts@4 as ts, __tsid@3 as __tsid, greptime_value@0 as greptime_value, host@1 as host, job@2 as job] REDACTED
@@ -537,13 +537,13 @@ TQL ANALYZE (0, 5, '5s') (tsid_binary_join_left or tsid_binary_join_right) / tsi
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 | 1_| 0_|_PromInstantManipulateExec: range=[0..5000], lookback=[300000], interval=[5000], time index=[ts] REDACTED
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 |_|_| Total rows: 4_|
 +-+-+-+
@@ -582,19 +582,19 @@ TQL ANALYZE (0, 5, '5s') (tsid_binary_join_left / ignoring(host) group_left tsid
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 | 1_| 0_|_PromInstantManipulateExec: range=[0..5000], lookback=[300000], interval=[5000], time index=[ts] REDACTED
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 | 1_| 0_|_PromInstantManipulateExec: range=[0..5000], lookback=[300000], interval=[5000], time index=[ts] REDACTED
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[greptime_value@1 as greptime_value, host@3 as host, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":REDACTED, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 |_|_| Total rows: 4_|
 +-+-+-+
diff --git a/tests/cases/standalone/common/promql/tsid_histogram_quantile_regression.result b/tests/cases/standalone/common/promql/tsid_histogram_quantile_regression.result
index e50fa43f10e..10b31cac1e1 100644
--- a/tests/cases/standalone/common/promql/tsid_histogram_quantile_regression.result
+++ b/tests/cases/standalone/common/promql/tsid_histogram_quantile_regression.result
@@ -118,7 +118,7 @@ TQL ANALYZE (0, 10, '5s') histogram_quantile(0.5, tsid_no_aggr_histogram_bucket)
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[val@1 as val, job@3 as job, le@4 as le, __tsid@2 as __tsid, ts@0 as ts] REDACTED
 |_|_|_CooperativeExec REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":{"count":1, "mem_ranges":1, "files":0, "file_ranges":0}, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":{"count":1, "mem_ranges":1, "files":0, "file_ranges":0}, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 |_|_| Total rows: 3_|
 +-+-+-+
diff --git a/tests/cases/standalone/tql-explain-analyze/tsid_column.result b/tests/cases/standalone/tql-explain-analyze/tsid_column.result
index cf2deb76647..2b12f8ba570 100644
--- a/tests/cases/standalone/tql-explain-analyze/tsid_column.result
+++ b/tests/cases/standalone/tql-explain-analyze/tsid_column.result
@@ -54,7 +54,7 @@ TQL ANALYZE (0, 10, '5s') sum(tsid_metric);
 |_|_|_PromInstantManipulateExec: range=[0..10000], lookback=[300000], interval=[5000], time index=[ts] REDACTED
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[val@1 as val, __tsid@2 as __tsid, ts@0 as ts] REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":{"count":1, "mem_ranges":1, "files":0, "file_ranges":0}, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":{"count":1, "mem_ranges":1, "files":0, "file_ranges":0}, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 |_|_| Total rows: 3_|
 +-+-+-+
@@ -82,7 +82,7 @@ TQL ANALYZE (0, 10, '5s') sum by (job, instance) (tsid_metric);
 |_|_|_PromInstantManipulateExec: range=[0..10000], lookback=[300000], interval=[5000], time index=[ts] REDACTED
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[val@1 as val, instance@3 as instance, job@4 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":{"count":1, "mem_ranges":1, "files":0, "file_ranges":0}, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":{"count":1, "mem_ranges":1, "files":0, "file_ranges":0}, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 |_|_| Total rows: 6_|
 +-+-+-+
@@ -120,7 +120,7 @@ TQL ANALYZE (0, 10, '5s')  sum(irate(tsid_metric[1h])) / scalar(count(count(tsid
 |_|_|_PromInstantManipulateExec: range=[0..10000], lookback=[300000], interval=[5000], time index=[ts] REDACTED
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[val@1 as val, job@3 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":{"count":1, "mem_ranges":1, "files":0, "file_ranges":0}, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":{"count":1, "mem_ranges":1, "files":0, "file_ranges":0}, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 | 1_| 0_|_SortPreservingMergeExec: [ts@0 ASC NULLS LAST] REDACTED
 |_|_|_SortExec: expr=[ts@0 ASC NULLS LAST], preserve_partitioning=[true] REDACTED
@@ -133,7 +133,7 @@ TQL ANALYZE (0, 10, '5s')  sum(irate(tsid_metric[1h])) / scalar(count(count(tsid
 |_|_|_PromSeriesNormalizeExec: offset=[0], time index=[ts], filter NaN: [true] REDACTED
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[val@1 as val, __tsid@2 as __tsid, ts@0 as ts] REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":{"count":1, "mem_ranges":1, "files":0, "file_ranges":0}, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":{"count":1, "mem_ranges":1, "files":0, "file_ranges":0}, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 |_|_| Total rows: 2_|
 +-+-+-+
@@ -173,7 +173,7 @@ TQL ANALYZE (0, 10, '5s')  sum(irate(tsid_metric[1h])) / scalar(count(sum(tsid_m
 |_|_|_PromInstantManipulateExec: range=[0..10000], lookback=[300000], interval=[5000], time index=[ts] REDACTED
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[val@1 as val, job@3 as job, __tsid@2 as __tsid, ts@0 as ts] REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":{"count":1, "mem_ranges":1, "files":0, "file_ranges":0}, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":{"count":1, "mem_ranges":1, "files":0, "file_ranges":0}, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 | 1_| 0_|_SortPreservingMergeExec: [ts@0 ASC NULLS LAST] REDACTED
 |_|_|_SortExec: expr=[ts@0 ASC NULLS LAST], preserve_partitioning=[true] REDACTED
@@ -186,7 +186,7 @@ TQL ANALYZE (0, 10, '5s')  sum(irate(tsid_metric[1h])) / scalar(count(sum(tsid_m
 |_|_|_PromSeriesNormalizeExec: offset=[0], time index=[ts], filter NaN: [true] REDACTED
 |_|_|_PromSeriesDivideExec: tags=["__tsid"] REDACTED
 |_|_|_ProjectionExec: expr=[val@1 as val, __tsid@2 as __tsid, ts@0 as ts] REDACTED
-|_|_|_SeriesScan: region=REDACTED, "partition_count":{"count":1, "mem_ranges":1, "files":0, "file_ranges":0}, "distribution":"PerSeries", "mode":"two_phase" REDACTED
+|_|_|_SeriesScan: region=REDACTED, "partition_count":{"count":1, "mem_ranges":1, "files":0, "file_ranges":0}, "distribution":"PerSeries", "mode":"legacy" REDACTED
 |_|_|_|
 |_|_| Total rows: 2_|
 +-+-+-+