diff --git a/rust/lakesoul-datafusion/src/catalog/lakesoul_catalog.rs b/rust/lakesoul-datafusion/src/catalog/lakesoul_catalog.rs
index 7d6d4d2dc..b0fa12b5f 100644
--- a/rust/lakesoul-datafusion/src/catalog/lakesoul_catalog.rs
+++ b/rust/lakesoul-datafusion/src/catalog/lakesoul_catalog.rs
@@ -4,7 +4,7 @@
 
 use crate::catalog::LakeSoulNamespace;
 use datafusion::catalog::schema::SchemaProvider;
-use datafusion::catalog::{CatalogProvider, MemoryCatalogProvider};
+use datafusion::catalog::CatalogProvider;
 use datafusion::prelude::SessionContext;
 use lakesoul_metadata::MetaDataClientRef;
 use std::any::Any;
diff --git a/rust/lakesoul-datafusion/src/catalog/lakesoul_namespace.rs b/rust/lakesoul-datafusion/src/catalog/lakesoul_namespace.rs
index fac3a2571..4e38883ed 100644
--- a/rust/lakesoul-datafusion/src/catalog/lakesoul_namespace.rs
+++ b/rust/lakesoul-datafusion/src/catalog/lakesoul_namespace.rs
@@ -11,9 +11,7 @@ use datafusion::prelude::SessionContext;
 use lakesoul_io::datasource::file_format::LakeSoulParquetFormat;
 use lakesoul_io::datasource::listing::LakeSoulListingTable;
 use lakesoul_metadata::MetaDataClientRef;
-use proto::proto::entity::Namespace;
 use std::any::Any;
-use std::collections::HashSet;
 use std::fmt::{Debug, Formatter};
 use std::sync::Arc;
 use tokio::runtime::Handle;
@@ -140,7 +138,7 @@ impl SchemaProvider for LakeSoulNamespace {
 
     fn table_exist(&self, name: &str) -> bool {
         // table name is primary key for `table_name_id`
-        self.table_names().into_iter().find(|s| s == name).is_some()
+        self.table_names().into_iter().any(|s| s == name)
     }
 }
 
diff --git a/rust/lakesoul-datafusion/src/catalog/mod.rs b/rust/lakesoul-datafusion/src/catalog/mod.rs
index 9cd4b77ec..ff255e1f3 100644
--- a/rust/lakesoul-datafusion/src/catalog/mod.rs
+++ b/rust/lakesoul-datafusion/src/catalog/mod.rs
@@ -20,6 +20,9 @@ use crate::error::Result;
 // pub mod lakesoul_sink;
 // pub mod lakesoul_source;
 mod lakesoul_catalog;
+// used in catalog_test, but still say unused_imports, i think it is a bug about rust-lint.
+// this is a workaround
+#[cfg(test)]
 pub use lakesoul_catalog::*;
 mod lakesoul_namespace;
 pub use lakesoul_namespace::*;
diff --git a/rust/lakesoul-datafusion/src/lib.rs b/rust/lakesoul-datafusion/src/lib.rs
index e75f1c301..654a205ac 100644
--- a/rust/lakesoul-datafusion/src/lib.rs
+++ b/rust/lakesoul-datafusion/src/lib.rs
@@ -1,7 +1,9 @@
 // SPDX-FileCopyrightText: 2023 LakeSoul Contributors
 //
 // SPDX-License-Identifier: Apache-2.0
-
+#![allow(dead_code)]
+#![allow(clippy::type_complexity)]
+// after finished. remove above attr
 extern crate core;
 
 mod catalog;
diff --git a/rust/lakesoul-datafusion/src/test/catalog_tests.rs b/rust/lakesoul-datafusion/src/test/catalog_tests.rs
index 47f18f3c4..bb29a37db 100644
--- a/rust/lakesoul-datafusion/src/test/catalog_tests.rs
+++ b/rust/lakesoul-datafusion/src/test/catalog_tests.rs
@@ -2,21 +2,20 @@
 //
 // SPDX-License-Identifier: Apache-2.0
 
+#[cfg(test)]
 mod catalog_tests {
-    use crate::catalog::LakeSoulTableProperty;
-    use crate::catalog::{LakeSoulCatalog, LakeSoulNamespace};
+    use crate::catalog::{LakeSoulCatalog, LakeSoulNamespace,LakeSoulTableProperty};
     use crate::lakesoul_table::LakeSoulTable;
     use crate::serialize::arrow_java::ArrowJavaSchema;
     use arrow::array::{ArrayRef, Int32Array, RecordBatch};
     use arrow::datatypes::{DataType, Field, Schema, SchemaRef};
     use datafusion::assert_batches_eq;
     use datafusion::catalog::schema::SchemaProvider;
-    use datafusion::catalog::{CatalogList, CatalogProvider};
     use lakesoul_io::lakesoul_io_config::create_session_context;
-    use lakesoul_io::lakesoul_io_config::{LakeSoulIOConfig, LakeSoulIOConfigBuilder};
+    use lakesoul_io::lakesoul_io_config::LakeSoulIOConfigBuilder;
     use lakesoul_metadata::{MetaDataClient, MetaDataClientRef};
-    use proto::proto::entity::{Namespace, TableInfo, TableNameId};
-    use rand::distributions::{Alphanumeric, Standard};
+    use proto::proto::entity::{Namespace, TableInfo};
+    use rand::distributions::Alphanumeric;
     use rand::{thread_rng, Rng, SeedableRng};
     use rand_chacha::ChaCha8Rng;
     use std::env;
@@ -100,13 +99,11 @@ mod catalog_tests {
         let rt = Runtime::new().unwrap();
         rt.block_on(async {
             let client = Arc::new(MetaDataClient::from_env().await.unwrap());
-            let mut config = LakeSoulIOConfigBuilder::new().build();
             // insert data;
             let batch = create_batch_i32(
                 vec!["range", "hash", "value"],
                 vec![&[20201101, 20201101, 20201101, 20201102], &[1, 2, 3, 4], &[1, 2, 3, 4]],
             );
-            let table_name = "test_table_01";
             let pks = vec!["range".to_string(), "hash".to_string()];
             let schema = SchemaRef::new(Schema::new(
                 ["range", "hash", "value"]
diff --git a/rust/lakesoul-io/src/datasource/parquet_source.rs b/rust/lakesoul-io/src/datasource/parquet_source.rs
index 7c427a6b4..77fcc8062 100644
--- a/rust/lakesoul-io/src/datasource/parquet_source.rs
+++ b/rust/lakesoul-io/src/datasource/parquet_source.rs
@@ -346,7 +346,7 @@ pub fn merge_stream(
         let merge_stream = SortedStreamMerger::new_from_streams(
             streams,
             merge_schema,
-            primary_keys.iter().map(String::clone).collect(),
+            primary_keys.iter().cloned().collect(),
             batch_size,
             merge_ops,
         )
diff --git a/rust/lakesoul-io/src/filter/parser.rs b/rust/lakesoul-io/src/filter/parser.rs
index 57661fbb8..732381179 100644
--- a/rust/lakesoul-io/src/filter/parser.rs
+++ b/rust/lakesoul-io/src/filter/parser.rs
@@ -163,7 +163,7 @@ fn qualified_expr(expr_str: &str, schema: SchemaRef) -> Option<(Expr, Arc<Field>
         let mut expr: Option<(Expr, Arc<Field>)> = None;
         let mut root = "".to_owned();
         let mut sub_fields: &Fields = schema.fields();
-        for expr_substr in expr_str.split('.').into_iter() {
+        for expr_substr in expr_str.split('.') {
             root = if root.is_empty() {
                 expr_substr.to_owned()
             } else {