make lint

Author: SkyFan2002

src/query/sql/src/planner/optimizer/optimizer.rs

@@ -611,6 +611,9 @@ pub fn optimize_append(
             let exchange = Arc::new(RelOperator::Exchange(Exchange::Merge));
             Ok(SExpr::create_unary(exchange, Arc::new(copy_into)))
         }
-        false => Ok(SExpr::create_unary(Arc::new(append.into()), Arc::new(source))),
+        false => Ok(SExpr::create_unary(
+            Arc::new(append.into()),
+            Arc::new(source),
+        )),
     }
 }

src/query/sql/src/planner/plans/append.rs

@@ -43,9 +43,7 @@ use super::RelOp;
 use crate::executor::physical_plans::PhysicalAppend;
 use crate::executor::PhysicalPlan;
 use crate::executor::PhysicalPlanBuilder;
-use crate::optimizer::optimize;
 use crate::optimizer::optimize_append;
-use crate::optimizer::OptimizerContext;
 use crate::optimizer::SExpr;
 use crate::ColumnBinding;
 use crate::IndexType;
@@ -114,13 +112,13 @@ pub async fn create_append_plan_from_subquery(
 
     let optimized_append = optimize_append(insert_plan, source, metadata.clone(), ctx.as_ref())?;
 
-    Plan::Append {
+    Ok(Plan::Append {
         s_expr: Box::new(optimized_append),
         metadata: metadata.clone(),
         stage_table_info: None,
         overwrite,
         forbid_occ_retry,
-    }
+    })
 }
 
 impl Hash for Append {