update docs

README-zh_CN.md

@@ -5,13 +5,9 @@
 [npm-image]: https://img.shields.io/npm/v/dt-sql-parser.svg?style=flat-square
 [npm-url]: https://www.npmjs.com/package/dt-sql-parser
 
-此项目是基于 [ANTLR4](https://github.com/antlr/antlr4) 开发的 SQL 语言解析器。主要用于大数据开发中，对各类 SQL 的解析。目前支持的 SQL：
+[English](./README.md) | 简体中文
 
-- MySQL
-- Flink SQL
-- Spark SQL
-- Hive SQL
-- PL/SQL
+dt-sql-parser 是一个基于 [ANTLR4](https://github.com/antlr/antlr4) 开发的 SQL 解析器集合。主要用于大数据开发中，对各类 SQL 的解析。
 
 每种 SQL 都提供了对应基础类、Visitor 类和 Listener 类，包含了生成 token、生成 AST、语法校验、visitor 和 listener 模式遍历 AST 指定节点等功能。
 
@@ -19,7 +15,13 @@
 
 提示：项目中的 grammar 文件也可以通过 [ANTLR4](https://github.com/antlr/antlr4) 编译成其他语言
 
-[English](./README.md) | 简体中文
+目前支持的 SQL：
+
+- MySQL
+- Flink SQL
+- Spark SQL
+- Hive SQL
+- PL/SQL
 
 ## 安装
 
@@ -209,7 +211,7 @@ TableName user1
 ## 路线图
 
 - Auto-complete
-- Impala SQL
+- Format code
 
 ## 许可证
 

README.md

@@ -5,13 +5,9 @@
 [npm-image]: https://img.shields.io/npm/v/dt-sql-parser.svg?style=flat-square
 [npm-url]: https://www.npmjs.com/package/dt-sql-parser
 
-dt-sql-parser is a SQL parser built on [ANTLR4](https://github.com/antlr/antlr4) .It's mainly used for analyzing all kinds of SQL in the development of big data. Supported SQL:
+English | [简体中文](./README-zh_CN.md)
 
-- MySQL
-- Flink SQL
-- Spark SQL
-- Hive SQL
-- PL/SQL
+dt-sql-parser is a collection of SQL parsers developed based on [ANTLR4](https://github.com/antlr/antlr4) .It's mainly used for parsing all kinds of SQL in the development of big data.
 
 It provides the basic class, Visitor class, and Listener class. These class including the ability to generate tokens, generate parse tree, syntax validation, and Visitor & Listener patterns to traverse the AST.
 
@@ -19,7 +15,13 @@ In addition, several helper methods are provided to format the SQL before parsin
 
 tips: The Grammar file can also be compiled into other languages with [ANTLR4](https://github.com/antlr/antlr4) .
 
-English | [简体中文](./README-zh_CN.md)
+Supported SQL:
+
+- MySQL
+- Flink SQL
+- Spark SQL
+- Hive SQL
+- PL/SQL
 
 ## Installation
 
@@ -209,7 +211,7 @@ tips: The node's method name can be found in the Listener file under the corresp
 ## Roadmap
 
 - Auto-complete
-- Impala SQL
+- Format code
 
 ## License