diff --git a/src/utils/index.ts b/src/utils/index.ts
index 44952a2..f869013 100644
--- a/src/utils/index.ts
+++ b/src/utils/index.ts
@@ -163,7 +163,7 @@ function splitSql(sql: string) {
  * @param {String} sql
  */
 function cleanSql(sql: string) {
-    sql = sql.trim(); // 删除前后空格
+    sql.trim(); // 删除前后空格
     const tokens = lexer(sql);
     let resultSql = '';
     let startIndex = 0;
diff --git a/test/utils/index.test.ts b/test/utils/index.test.ts
index 3b69ff6..1215835 100644
--- a/test/utils/index.test.ts
+++ b/test/utils/index.test.ts
@@ -39,12 +39,4 @@ describe('utils', () => {
         const result = cleanSql(sql);
         expect(result.indexOf('xxx')).toEqual(-1);
     });
-
-    test('clean SQL white spaces', () => {
-        const sql = `   
-        select * from a;    `;
-        const expected = 'select * from a;';
-        const result = cleanSql(sql);
-        expect(result).toEqual(expected);
-    });
 });