fix: allow physical region alter region options

src/metric-engine/src/data_region.rs

@@ -27,9 +27,10 @@ use store_api::storage::consts::ReservedColumnId;
 use store_api::storage::{ConcreteDataType, RegionId};
 
 use crate::error::{
-    ColumnTypeMismatchSnafu, MitoReadOperationSnafu, MitoWriteOperationSnafu, Result,
+    ColumnTypeMismatchSnafu, ForbiddenPhysicalAlterSnafu, MitoReadOperationSnafu,
+    MitoWriteOperationSnafu, Result,
 };
-use crate::metrics::MITO_DDL_DURATION;
+use crate::metrics::{FORBIDDEN_OPERATION_COUNT, MITO_DDL_DURATION};
 use crate::utils;
 
 const MAX_RETRIES: usize = 5;
@@ -186,6 +187,30 @@ impl DataRegion {
             .context(MitoReadOperationSnafu)?;
         Ok(metadata.column_metadatas.clone())
     }
+
+    pub async fn alter_region_options(
+        &self,
+        region_id: RegionId,
+        request: RegionAlterRequest,
+    ) -> Result<AffectedRows> {
+        match request.kind {
+            AlterKind::SetRegionOptions { options: _ }
+            | AlterKind::UnsetRegionOptions { keys: _ } => {
+                let region_id = utils::to_data_region_id(region_id);
+                self.mito
+                    .handle_request(region_id, RegionRequest::Alter(request))
+                    .await
+                    .context(MitoWriteOperationSnafu)
+                    .map(|result| result.affected_rows)
+            }
+            _ => {
+                info!("Metric region received alter request {request:?} on physical region {region_id:?}");
+                FORBIDDEN_OPERATION_COUNT.inc();
+
+                ForbiddenPhysicalAlterSnafu.fail()
+            }
+        }
+    }
 }
 
 #[cfg(test)]

src/metric-engine/src/engine.rs

@@ -96,9 +96,10 @@ use crate::utils;
 /// |    Read    |       ✅        |        ✅        |
 /// |   Close    |       ✅        |        ✅        |
 /// |    Open    |       ✅        |        ✅        |
-/// |   Alter    |       ✅        |        ❌        |
+/// |   Alter    |       ✅        |        ❓*       |
 ///
 /// *: Physical region can be dropped only when all related logical regions are dropped.
+/// *: Alter: Physical regions only support altering region options.
 ///
 /// ## Internal Columns
 ///

src/metric-engine/src/engine/alter.rs

@@ -14,18 +14,15 @@
 
 use std::collections::HashMap;
 
-use common_telemetry::{error, info};
+use common_telemetry::error;
 use snafu::{OptionExt, ResultExt};
 use store_api::metadata::ColumnMetadata;
 use store_api::metric_engine_consts::ALTER_PHYSICAL_EXTENSION_KEY;
 use store_api::region_request::{AffectedRows, AlterKind, RegionAlterRequest};
 use store_api::storage::RegionId;
 
 use crate::engine::MetricEngineInner;
-use crate::error::{
-    ForbiddenPhysicalAlterSnafu, LogicalRegionNotFoundSnafu, Result, SerializeColumnMetadataSnafu,
-};
-use crate::metrics::FORBIDDEN_OPERATION_COUNT;
+use crate::error::{LogicalRegionNotFoundSnafu, Result, SerializeColumnMetadataSnafu};
 use crate::utils::{to_data_region_id, to_metadata_region_id};
 
 impl MetricEngineInner {
@@ -150,20 +147,22 @@ impl MetricEngineInner {
         region_id: RegionId,
         request: RegionAlterRequest,
     ) -> Result<()> {
-        info!("Metric region received alter request {request:?} on physical region {region_id:?}");
-        FORBIDDEN_OPERATION_COUNT.inc();
-
-        ForbiddenPhysicalAlterSnafu.fail()
+        self.data_region
+            .alter_region_options(region_id, request)
+            .await?;
+        Ok(())
     }
 }
 
 #[cfg(test)]
 mod test {
+    use std::time::Duration;
+
     use api::v1::SemanticType;
     use datatypes::data_type::ConcreteDataType;
     use datatypes::schema::ColumnSchema;
     use store_api::metadata::ColumnMetadata;
-    use store_api::region_request::AddColumn;
+    use store_api::region_request::{AddColumn, SetRegionOption};
 
     use super::*;
     use crate::test_util::TestEnv;
@@ -204,6 +203,18 @@ mod test {
             "Alter request to physical region is forbidden".to_string()
         );
 
+        // alter physical region's option should work
+        let alter_region_option_request = RegionAlterRequest {
+            schema_version: 0,
+            kind: AlterKind::SetRegionOptions {
+                options: vec![SetRegionOption::TTL(Duration::from_secs(500))],
+            },
+        };
+        let result = engine_inner
+            .alter_physical_region(physical_region_id, alter_region_option_request.clone())
+            .await;
+        assert!(result.is_ok());
+
         // alter logical region
         let metadata_region = env.metadata_region();
         let logical_region_id = env.default_logical_region_id();

src/mito2/src/engine/alter_test.rs

@@ -27,6 +27,7 @@ use store_api::metadata::ColumnMetadata;
 use store_api::region_engine::{RegionEngine, RegionRole};
 use store_api::region_request::{
     AddColumn, AddColumnLocation, AlterKind, RegionAlterRequest, RegionOpenRequest, RegionRequest,
+    SetRegionOption,
 };
 use store_api::storage::{RegionId, ScanRequest};
 
@@ -573,6 +574,62 @@ async fn test_alter_column_fulltext_options() {
     check_region_version(&engine, region_id, 1, 3, 1, 3);
 }
 
+#[tokio::test]
+async fn test_alter_region_ttl_options() {
+    common_telemetry::init_default_ut_logging();
+
+    let mut env = TestEnv::new();
+    let listener = Arc::new(AlterFlushListener::default());
+    let engine = env
+        .create_engine_with(MitoConfig::default(), None, Some(listener.clone()))
+        .await;
+
+    let region_id = RegionId::new(1, 1);
+    let request = CreateRequestBuilder::new().build();
+
+    env.get_schema_metadata_manager()
+        .register_region_table_info(
+            region_id.table_id(),
+            "test_table",
+            "test_catalog",
+            "test_schema",
+            None,
+        )
+        .await;
+    engine
+        .handle_request(region_id, RegionRequest::Create(request))
+        .await
+        .unwrap();
+    let engine_cloned = engine.clone();
+    let alter_ttl_request = RegionAlterRequest {
+        schema_version: 0,
+        kind: AlterKind::SetRegionOptions {
+            options: vec![SetRegionOption::TTL(Duration::from_secs(500))],
+        },
+    };
+    let alter_job = tokio::spawn(async move {
+        engine_cloned
+            .handle_request(region_id, RegionRequest::Alter(alter_ttl_request))
+            .await
+            .unwrap();
+    });
+
+    alter_job.await.unwrap();
+
+    let check_ttl = |engine: &MitoEngine, expected: &Duration| {
+        let current_ttl = engine
+            .get_region(region_id)
+            .unwrap()
+            .version()
+            .options
+            .ttl
+            .unwrap();
+        assert_eq!(*expected, current_ttl);
+    };
+    // Verify the ttl.
+    check_ttl(&engine, &Duration::from_secs(500));
+}
+
 #[tokio::test]
 async fn test_write_stall_on_altering() {
     common_telemetry::init_default_ut_logging();

tests/cases/standalone/common/alter/alter_table_options.result

@@ -281,3 +281,54 @@ DROP TABLE ato;
 
 Affected Rows: 0
 
+CREATE TABLE phy (ts timestamp time index, val double) engine=metric with ("physical_metric_table" = "");
+
+Affected Rows: 0
+
+ALTER TABLE phy set ttl='2years';
+
+Affected Rows: 0
+
+SHOW CREATE TABLE phy;
+
++-------+------------------------------------+
+| Table | Create Table                       |
++-------+------------------------------------+
+| phy   | CREATE TABLE IF NOT EXISTS "phy" ( |
+|       |   "ts" TIMESTAMP(3) NOT NULL,      |
+|       |   "val" DOUBLE NULL,               |
+|       |   TIME INDEX ("ts")                |
+|       | )                                  |
+|       |                                    |
+|       | ENGINE=metric                      |
+|       | WITH(                              |
+|       |   physical_metric_table = '',      |
+|       |   ttl = '2years'                   |
+|       | )                                  |
++-------+------------------------------------+
+
+ALTER TABLE phy UNSET 'ttl';
+
+Affected Rows: 0
+
+SHOW CREATE TABLE phy;
+
++-------+------------------------------------+
+| Table | Create Table                       |
++-------+------------------------------------+
+| phy   | CREATE TABLE IF NOT EXISTS "phy" ( |
+|       |   "ts" TIMESTAMP(3) NOT NULL,      |
+|       |   "val" DOUBLE NULL,               |
+|       |   TIME INDEX ("ts")                |
+|       | )                                  |
+|       |                                    |
+|       | ENGINE=metric                      |
+|       | WITH(                              |
+|       |   physical_metric_table = ''       |
+|       | )                                  |
++-------+------------------------------------+
+
+DROP TABLE phy;
+
+Affected Rows: 0
+

tests/cases/standalone/common/alter/alter_table_options.sql

@@ -60,3 +60,15 @@ SHOW CREATE TABLE ato;
 SHOW CREATE TABLE ato;
 
 DROP TABLE ato;
+
+CREATE TABLE phy (ts timestamp time index, val double) engine=metric with ("physical_metric_table" = "");
+
+ALTER TABLE phy set ttl='2years';
+
+SHOW CREATE TABLE phy;
+
+ALTER TABLE phy UNSET 'ttl';
+
+SHOW CREATE TABLE phy;
+
+DROP TABLE phy;