perf: close issue 4974 by do not delete columns when drop logical region about 100 times faster (#5561)

* perf: do not delete columns when drop logical region in drop database

Signed-off-by: yihong0618 <zouzou0208@gmail.com>

* fix: make ci happy

Signed-off-by: yihong0618 <zouzou0208@gmail.com>

* fix: address review comments

Signed-off-by: yihong0618 <zouzou0208@gmail.com>

* fix: address some comments

Signed-off-by: yihong0618 <zouzou0208@gmail.com>

* fix: drop stupid comments by copilot

Signed-off-by: yihong0618 <zouzou0208@gmail.com>

* chore: minor refactor

* chore: minor refactor

* chore: update grpetime-proto

---------

Signed-off-by: yihong0618 <zouzou0208@gmail.com>
Co-authored-by: WenyXu <wenymedia@gmail.com>

src/common/meta/src/ddl/drop_database/executor.rs

@@ -128,7 +128,7 @@ impl State for DropDatabaseExecutor {
             .await?;
         executor.invalidate_table_cache(ddl_ctx).await?;
         executor
-            .on_drop_regions(ddl_ctx, &self.physical_region_routes)
+            .on_drop_regions(ddl_ctx, &self.physical_region_routes, true)
             .await?;
         info!("Table: {}({}) is dropped", self.table_name, self.table_id);
 

src/common/meta/src/ddl/drop_table.rs

@@ -156,7 +156,7 @@ impl DropTableProcedure {
 
     pub async fn on_datanode_drop_regions(&mut self) -> Result<Status> {
         self.executor
-            .on_drop_regions(&self.context, &self.data.physical_region_routes)
+            .on_drop_regions(&self.context, &self.data.physical_region_routes, false)
             .await?;
         self.data.state = DropTableState::DeleteTombstone;
         Ok(Status::executing(true))

src/common/meta/src/ddl/drop_table/executor.rs

@@ -214,6 +214,7 @@ impl DropTableExecutor {
         &self,
         ctx: &DdlContext,
         region_routes: &[RegionRoute],
+        fast_path: bool,
     ) -> Result<()> {
         let leaders = find_leaders(region_routes);
         let mut drop_region_tasks = Vec::with_capacity(leaders.len());
@@ -236,6 +237,7 @@ impl DropTableExecutor {
                     }),
                     body: Some(region_request::Body::Drop(PbDropRegionRequest {
                         region_id: region_id.as_u64(),
+                        fast_path,
                     })),
                 };
                 let datanode = datanode.clone();