diff --git a/documentation20/cn/08.connector/docs.md b/documentation20/cn/08.connector/docs.md
index f26928eec7a0780a937f2b618a543926a1794e8a..2d76c866d11c1e1f51927c5536184b15aa6afe14 100644
--- a/documentation20/cn/08.connector/docs.md
+++ b/documentation20/cn/08.connector/docs.md
@@ -805,7 +805,7 @@ C#连接器支持的系统有：Linux 64/Windows x64/Windows x86
 
 * 应用驱动安装请参考[安装连接器驱动步骤](https://www.taosdata.com/cn/documentation/connector#driver)。
 * .NET接口文件TDengineDrivercs.cs和参考程序示例TDengineTest.cs均位于Windows客户端install_directory/examples/C#目录下。
-* 在Windows系统上，C#应用程序可以使用TDengine的原生C接口来执行所有数据库操作，后续版本将提供ORM（dapper）框架驱动。
+* 在Windows系统上，C#应用程序可以使用TDengine的原生C接口来执行所有数据库操作，后续版本将提供ORM（Dapper）框架驱动。
 
 ### 安装验证
 
diff --git a/documentation20/cn/10.cluster/docs.md b/documentation20/cn/10.cluster/docs.md
index 62d709c279e96d05996dee977450ed81a27e517a..db20ca4edb6513f70ebbf17969be1c20dccb6163 100644
--- a/documentation20/cn/10.cluster/docs.md
+++ b/documentation20/cn/10.cluster/docs.md
@@ -85,7 +85,7 @@ taos>
 
 将后续的数据节点添加到现有集群，具体有以下几步：
 
-1. 按照[《立即开始》](https://www.taosdata.com/cn/documentation/getting-started/)一章的方法在每个物理节点启动taosd；
+1. 按照[《立即开始》](https://www.taosdata.com/cn/documentation/getting-started/)一章的方法在每个物理节点启动taosd；（注意：每个物理节点都需要在 taos.cfg 文件中将 firstEP 参数配置为新集群首个节点的 End Point——在本例中是 h1.taos.com:6030）
 
 2. 在第一个数据节点，使用CLI程序taos, 登录进TDengine系统, 执行命令:
 
diff --git a/documentation20/cn/11.administrator/docs.md b/documentation20/cn/11.administrator/docs.md
index ae13a36f76ff92994c474452d91655adb37a6722..10951ed1fbd7185b3944276fc393e59f352e05ef 100644
--- a/documentation20/cn/11.administrator/docs.md
+++ b/documentation20/cn/11.administrator/docs.md
@@ -131,7 +131,7 @@ taosd -C
 - quorum：多副本环境下指令执行的确认数要求。取值范围：1、2，单位为个，默认值：1。（可通过 alter database 修改）
 - precision：时间戳精度标识。ms表示毫秒，us表示微秒，默认值：ms。（2.1.2.0 版本之前、2.0.20.7 版本之前在 taos.cfg 文件中不支持此参数。）
 - cacheLast：是否在内存中缓存子表的最近数据。0：关闭；1：缓存子表最近一行数据；2：缓存子表每一列的最近的非NULL值；3：同时打开缓存最近行和列功能。默认值：0。（可通过 alter database 修改）（从 2.1.2.0 版本开始此参数支持 0～3 的取值范围，在此之前取值只能是 [0, 1]；而 2.0.11.0 之前的版本在 SQL 指令中不支持此参数。）（2.1.2.0 版本之前、2.0.20.7 版本之前在 taos.cfg 文件中不支持此参数。）
-- update：是否允许更新。0：不允许；1：允许。默认值：0。（可通过 alter database 修改）
+- update：是否允许更新。0：不允许；1：允许。默认值：0。
 
 对于一个应用场景，可能有多种数据特征的数据并存，最佳的设计是将具有相同数据特征的表放在一个库里，这样一个应用有多个库，而每个库可以配置不同的存储参数，从而保证系统有最优的性能。TDengine允许应用在创建库时指定上述存储参数，如果指定，该参数就将覆盖对应的系统配置参数。举例，有下述SQL：
 
diff --git a/documentation20/cn/12.taos-sql/docs.md b/documentation20/cn/12.taos-sql/docs.md
index b0268a9ed4497d7f6d8d5511fa85494399e361d2..278757b81b4fdcac72ab218168863308fb1bc906 100644
--- a/documentation20/cn/12.taos-sql/docs.md
+++ b/documentation20/cn/12.taos-sql/docs.md
@@ -139,11 +139,6 @@ TDengine 缺省的时间戳是毫秒精度，但通过在 CREATE DATABASE 时传
     ```
     FSYNC 参数控制执行 fsync 操作的周期。缺省值为 3000，单位是毫秒，取值范围为 [0, 180000]。如果设置为 0，表示每次写入，立即执行 fsync。该设置项主要用于调节 WAL 参数设为 2 时的系统行为。
 
-    ```mysql
-    ALTER DATABASE db_name UPDATE 0;
-    ```
-    UPDATE 参数控制是否允许更新数据。缺省值为 0，取值范围为 [0, 1]。0 表示会直接丢弃后写入的相同时间戳的数据；1 表示会使用后写入的数据覆盖已有的相同时间戳的数据。
-
     **Tips**: 以上所有参数修改后都可以用show databases来确认是否修改成功。另外，从 2.1.3.0 版本开始，修改这些参数后无需重启服务器即可生效。
 
 - **显示系统所有数据库**
diff --git a/documentation20/en/02.getting-started/docs.md b/documentation20/en/02.getting-started/docs.md
index fcfb88a6fe2fd48e39241a2ba7e7d2b8e347a3ff..19af3b5f3155374e663c5550ced6cc059e2bd23e 100644
--- a/documentation20/en/02.getting-started/docs.md
+++ b/documentation20/en/02.getting-started/docs.md
@@ -2,7 +2,7 @@
 
 ## <a class="anchor" id="install"></a>Quick Install
 
-TDegnine software consists of 3 parts: server, client, and alarm module. At the moment, TDengine server only runs on Linux (Windows, mac OS and more OS supports will come soon), but client can run on either Windows or Linux. TDengine client can be installed and run on Windows or Linux. Applications based-on any OSes can all connect to server taosd via a RESTful interface. About CPU, TDegnine supports X64/ARM64/MIPS64/Alpha64, and ARM32、RISC-V, other more CPU architectures will be supported soon. You can set up and install TDengine server either from the [source code](https://www.taosdata.com/en/getting-started/#Install-from-Source) or the [packages](https://www.taosdata.com/en/getting-started/#Install-from-Package).
+TDengine software consists of 3 parts: server, client, and alarm module. At the moment, TDengine server only runs on Linux (Windows, mac OS and more OS supports will come soon), but client can run on either Windows or Linux. TDengine client can be installed and run on Windows or Linux. Applications based-on any OSes can all connect to server taosd via a RESTful interface. About CPU, TDengine supports X64/ARM64/MIPS64/Alpha64, and ARM32、RISC-V, other more CPU architectures will be supported soon. You can set up and install TDengine server either from the [source code](https://www.taosdata.com/en/getting-started/#Install-from-Source) or the [packages](https://www.taosdata.com/en/getting-started/#Install-from-Package).
 
 ### <a class="anchor" id="source-install"></a>Install from Source
 
@@ -14,7 +14,7 @@ Please visit our [TDengine Official Docker Image: Distribution, Downloading, and
 
 ### <a class="anchor" id="package-install"></a>Install from Package
 
-It’s extremely easy to install for TDegnine, which takes only a few seconds from downloaded to successful installed. The server installation package includes clients and connectors. We provide 3 installation packages, which you can choose according to actual needs:
+It’s extremely easy to install for TDengine, which takes only a few seconds from downloaded to successful installed. The server installation package includes clients and connectors. We provide 3 installation packages, which you can choose according to actual needs:
 
 Click [here](https://www.taosdata.com/cn/getting-started/#%E9%80%9A%E8%BF%87%E5%AE%89%E8%A3%85%E5%8C%85%E5%AE%89%E8%A3%85) to download the install package.
 
@@ -39,8 +39,8 @@ If the service is running successfully, you can play around through TDengine she
 **Note:**
 
 - The `systemctl` command needs the **root** privilege. Use **sudo** if you are not the **root** user.
-- To get better product feedback and improve our solution, TDegnine will collect basic usage information, but you can modify the configuration parameter **telemetryReporting** in the system configuration file taos.cfg, and set it to 0 to turn it off.
-- TDegnine uses FQDN (usually hostname) as the node ID. In order to ensure normal operation, you need to set hostname for the server running taosd, and configure DNS service or hosts file for the machine running client application, to ensure the FQDN can be resolved.
+- To get better product feedback and improve our solution, TDengine will collect basic usage information, but you can modify the configuration parameter **telemetryReporting** in the system configuration file taos.cfg, and set it to 0 to turn it off.
+- TDengine uses FQDN (usually hostname) as the node ID. In order to ensure normal operation, you need to set hostname for the server running taosd, and configure DNS service or hosts file for the machine running client application, to ensure the FQDN can be resolved.
 - TDengine supports installation on Linux systems with[ systemd ](https://en.wikipedia.org/wiki/Systemd)as the process service management, and uses `which systemctl` command to detect whether `systemd` packages exist in the system:
   
   ```bash
diff --git a/documentation20/en/08.connector/docs.md b/documentation20/en/08.connector/docs.md
index 36dc06a36e770da115df14037787013758995f11..3da9937f98549712ed49885ae755509ec1669926 100644
--- a/documentation20/en/08.connector/docs.md
+++ b/documentation20/en/08.connector/docs.md
@@ -6,7 +6,7 @@ TDengine provides many connectors for development, including C/C++, JAVA, Python
 
 At present, TDengine connectors support a wide range of platforms, including hardware platforms such as X64/X86/ARM64/ARM32/MIPS/Alpha, and development environments such as Linux/Win64/Win32. The comparison matrix is as follows:
 
-| **CPU**     | **X64 64bit** | **X64 64bit** | **X64 64bit** | **X86 32bit** | **ARM64** | **ARM32** | **MIPS Godson** | **Alpha Whenwei** | **X64 TimecomTech** |
+| **CPU**     | **X64 64bit** | **X64 64bit** | **X64 64bit** | **X86 32bit** | **ARM64** | **ARM32** | **MIPS Godson** | **Alpha Sunway** | **X64 TimecomTech** |
 | ----------- | ------------- | ------------- | ------------- | ------------- | --------- | --------- | --------------- | ----------------- | ------------------- |
 | **OS**      | **Linux**     | **Win64**     | **Win32**     | **Win32**     | **Linux** | **Linux** | **Linux**       | **Linux**         | **Linux**           |
 | **C/C++**   | ●             | ●             | ●             | ○             | ●         | ●         | ○               | ○                 | ○                   |
@@ -75,9 +75,9 @@ Edit the taos.cfg file (default path/etc/taos/taos.cfg) and change firstEP to En
 * X64 hardware environment: TDengine-client-2.X.X.X-Windows-x64.exe
 * X86 hardware environment: TDengine-client-2.X.X.X-Windows-x86.exe
 
-**2. Execute installation, select default vales as prompted to complete**
+**2. Execute installation, select default values as prompted to complete**
 
-**3. Installatino path**
+**3. Installation path**
 
 Default installation path is: C:\TDengine, with following files(directories):
 
@@ -327,7 +327,7 @@ typedef struct TAOS_BIND {
 } TAOS_BIND;
 ```
 
-Add the curren bound parameters to the batch. After calling this function, you can call `taos_stmt_bind_param` again to bind the new parameters. It should be noted that this function only supports insert/import statements, and if it is other SQL statements such as select, it will return errors.
+Add the current bound parameters to the batch. After calling this function, you can call `taos_stmt_bind_param` again to bind the new parameters. It should be noted that this function only supports insert/import statements, and if it is other SQL statements such as select, it will return errors.
 
 - `int taos_stmt_execute(TAOS_STMT *stmt)`
 
@@ -523,7 +523,7 @@ Users can directly view the usage information of the module through Python's hel
 
 Refer to help (taos.TDEngineConnection) in python. This class corresponds to a connection between the client and TDengine. In the scenario of client multithreading, it is recommended that each thread apply for an independent connection instance, but not recommended that multiple threads share a connection.
 
-- *TDegnineCursor* class
+- *TDengineCursor* class
 
 Refer to help (taos.TDengineCursor) in python. This class corresponds to the write and query operations performed by the client. In the scenario of client multithreading, this cursor instance must be kept exclusive to threads and cannot be used by threads, otherwise errors will occur in the returned results.
 
@@ -685,7 +685,7 @@ Return value:
 }
 ```
 
-- Craete a database demo:
+- Create a database demo:
 
 ```bash
 curl -H 'Authorization: Basic cm9vdDp0YW9zZGF0YQ==' -d 'create database demo' 192.168.0.1:6041/rest/sql
@@ -771,7 +771,7 @@ The C # connector supports: Linux 64/Windows x64/Windows x86.
 
 - For application driver installation, please refer to the[ steps of installing connector driver](https://www.taosdata.com/en/documentation/connector#driver).
 - . NET interface file TDengineDrivercs.cs and reference sample TDengineTest.cs are both located in the Windows client install_directory/examples/C# directory.
-- On Windows, C # applications can use the native C interface of TDengine to perform all database operations, and future versions will provide the ORM (dapper) framework driver.
+- On Windows, C # applications can use the native C interface of TDengine to perform all database operations, and future versions will provide the ORM (Dapper) framework driver.
 
 ### Installation verification
 
@@ -908,7 +908,7 @@ Use Microsoft [windows-build-tools](https://github.com/felixrieseberg/windows-bu
 
 #### Solution 2
 
-Mannually install the following tools:
+Manually install the following tools:
 
 - Install Visual Studio related tools: [Visual Studio Build Tools](https://visualstudio.microsoft.com/thank-you-downloading-visual-studio/?sku=BuildTools) or [Visual Studio 2017 Community](https://visualstudio.microsoft.com/pl/thank-you-downloading-visual-studio/?sku=Community)
 - Install [Python](https://www.python.org/downloads/) 2.7 (not supported in v3.x.x) and execute npm config set python python2.7
diff --git a/src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/BadLocaleSettingTest.java b/src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/BadLocaleSettingTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..b351ee94bbcea3a4b6f79715bc03a405ff8d0c00
--- /dev/null
+++ b/src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/BadLocaleSettingTest.java
@@ -0,0 +1,58 @@
+package com.taosdata.jdbc.cases;
+
+
+import com.taosdata.jdbc.TSDBDriver;
+import org.junit.AfterClass;
+import org.junit.Assert;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import java.io.IOException;
+
+import java.sql.*;
+import java.util.Properties;
+
+public class BadLocaleSettingTest {
+
+    private static final String host = "127.0.0.1";
+    private static final String dbName = "bad_locale_test";
+    private static Connection conn;
+
+    @Test
+    public void canSetLocale() {
+        try {
+            Properties properties = new Properties();
+            properties.setProperty(TSDBDriver.PROPERTY_KEY_CHARSET, "UTF-8");
+            properties.setProperty(TSDBDriver.PROPERTY_KEY_LOCALE, "en_US.UTF-8");
+            properties.setProperty(TSDBDriver.PROPERTY_KEY_TIME_ZONE, "UTC-8");
+
+            String url = "jdbc:TAOS://" + host + ":6030/?user=root&password=taosdata";
+            conn = DriverManager.getConnection(url, properties);
+            Statement stmt = conn.createStatement();
+            stmt.execute("drop database if exists " + dbName);
+            stmt.execute("create database if not exists " + dbName);
+            stmt.execute("use " + dbName);
+            stmt.execute("drop table if exists weather");
+            stmt.execute("create table weather(ts timestamp, temperature float, humidity int)");
+            stmt.executeUpdate("insert into weather values(1624071506435, 12.3, 4)");
+            stmt.close();
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @BeforeClass
+    public static void beforeClass() {
+        System.setProperty("sun.jnu.encoding", "ANSI_X3.4-1968");
+        System.setProperty("file.encoding", "ANSI_X3.4-1968");
+    }
+
+    @AfterClass
+    public static void afterClass() {
+        try {
+            if (conn != null)
+                conn.close();
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/TimestampPrecisionInNanoInJniTest.java b/src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/TimestampPrecisionInNanoInJniTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..042d76d576b0c17fa9ec49e9ac88be851b3b47f7
--- /dev/null
+++ b/src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/TimestampPrecisionInNanoInJniTest.java
@@ -0,0 +1,570 @@
+package com.taosdata.jdbc.cases;
+
+
+import com.taosdata.jdbc.TSDBDriver;
+import org.junit.AfterClass;
+import org.junit.Assert;
+import org.junit.BeforeClass;
+import org.junit.After;
+import org.junit.Test;
+
+import java.sql.*;
+import java.util.Properties;
+import java.text.Format;
+import java.text.SimpleDateFormat;
+
+public class TimestampPrecisionInNanoInJniTest {
+
+    private static final String host = "127.0.0.1";
+    private static final String ns_timestamp_db = "ns_precision_test";
+    private static final long timestamp1 = System.currentTimeMillis();
+    private static final long timestamp2 = timestamp1 * 1000_000 + 123455;
+    private static final long timestamp3 = (timestamp1 + 10) * 1000_000 + 123456;
+    private static final Format format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
+    private static final String date1 = format.format(new Date(timestamp1));
+    private static final String date4 = format.format(new Date(timestamp1 + 10l));
+    private static final String date2 = date1 + "123455";
+    private static final String date3 = date4 + "123456";
+    
+
+    private static Connection conn;
+
+    @BeforeClass
+    public static void beforeClass() throws SQLException {
+        Properties properties = new Properties();
+        properties.setProperty(TSDBDriver.PROPERTY_KEY_CHARSET, "UTF-8");
+        properties.setProperty(TSDBDriver.PROPERTY_KEY_LOCALE, "en_US.UTF-8");
+        properties.setProperty(TSDBDriver.PROPERTY_KEY_TIME_ZONE, "UTC-8");
+
+        String url = "jdbc:TAOS://" + host + ":6030/?user=root&password=taosdata";
+        conn = DriverManager.getConnection(url, properties);
+
+        Statement stmt = conn.createStatement();
+        stmt.execute("drop database if exists " + ns_timestamp_db);
+        stmt.execute("create database if not exists " + ns_timestamp_db + " precision 'ns'");
+        stmt.execute("create table " + ns_timestamp_db + ".weather(ts timestamp, ts2 timestamp, f1 int)");
+        stmt.executeUpdate("insert into " + ns_timestamp_db + ".weather(ts, ts2, f1) values(\"" + date3 + "\", \"" + date3 +  "\", 128)");
+        stmt.executeUpdate("insert into " + ns_timestamp_db + ".weather(ts, ts2, f1) values(" + timestamp2 + "," + timestamp2 + ", 127)");
+        stmt.close();
+    }
+
+    @After
+    public void afterEach() throws SQLException {
+        Statement stmt = conn.createStatement();
+        stmt.execute("drop database if exists " + ns_timestamp_db);
+        stmt.execute("create database if not exists " + ns_timestamp_db + " precision 'ns'");
+        stmt.execute("create table " + ns_timestamp_db + ".weather(ts timestamp, ts2 timestamp, f1 int)");
+        stmt.executeUpdate("insert into " + ns_timestamp_db + ".weather(ts, ts2, f1) values(\"" + date3 + "\", \"" + date3 +  "\", 128)");
+        stmt.executeUpdate("insert into " + ns_timestamp_db + ".weather(ts, ts2, f1) values(" + timestamp2 + "," + timestamp2 + ", 127)");
+        stmt.close();
+    }
+
+    @AfterClass
+    public static void afterClass() {
+        try {
+            if (conn != null)
+                conn.close();
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private void checkCount(long count, ResultSet rs) throws SQLException {
+        if (count == 0) {
+            Assert.fail();
+        }
+        rs.next();
+        long test_count = rs.getLong(1);
+        Assert.assertEquals(count, test_count);
+    }
+
+    private void checkTime(long ts, ResultSet rs) throws SQLException {
+        rs.next();
+        int nanos = rs.getTimestamp(1).getNanos();
+        Assert.assertEquals(ts % 1000_000_000l, nanos);
+        long test_ts = rs.getLong(1);
+        Assert.assertEquals(ts / 1000_000l, test_ts);
+    }
+
+    @Test
+    public void canInsertTimestampAndQueryByEqualToInDateTypeInBothFirstAndSecondCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts = '" + date3 + "'");
+            checkCount(1l, rs);
+            rs = stmt.executeQuery("select ts from " + ns_timestamp_db + ".weather where ts = '" + date3 + "'");
+            checkTime(timestamp3, rs);
+            rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts2 = '" + date3 + "'");
+            checkCount(1l, rs);
+            rs = stmt.executeQuery("select ts2 from " + ns_timestamp_db + ".weather where ts2 = '" + date3 + "'");
+            checkTime(timestamp3, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canImportTimestampAndQueryByEqualToInDateTypeInBothFirstAndSecondCol() {
+        try (Statement stmt = conn.createStatement()) {
+            stmt.executeUpdate("import into " + ns_timestamp_db + ".weather(ts, ts2, f1) values(\"" + date1 + "123123\", \"" + date1 +  "123123\", 127)");
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts = '" + date1 + "123123'");
+            checkCount(1l, rs);
+            rs = stmt.executeQuery("select ts from " + ns_timestamp_db + ".weather where ts = '" + date1 + "123123'");
+            checkTime(timestamp1 * 1000_000l + 123123l, rs);
+            rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts2 = '" + date1 + "123123'");
+            checkCount(1l, rs);
+            rs = stmt.executeQuery("select ts2 from " + ns_timestamp_db + ".weather where ts2 = '" + date1 + "123123'");
+            checkTime(timestamp1 * 1000_000l + 123123l, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canInsertTimestampAndQueryByEqualToInNumberTypeInBothFirstAndSecondCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts = '" + timestamp2 + "'");
+            checkCount(1l, rs);
+            rs = stmt.executeQuery("select ts from " + ns_timestamp_db + ".weather where ts = '" + timestamp2 + "'");
+            checkTime(timestamp2, rs);
+            rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts2 = '" + timestamp2 + "'");
+            checkCount(1l, rs);
+            rs = stmt.executeQuery("select ts2 from " + ns_timestamp_db + ".weather where ts2 = '" + timestamp2 + "'");
+            checkTime(timestamp2, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canImportTimestampAndQueryByEqualToInNumberTypeInBothFirstAndSecondCol() {
+        try (Statement stmt = conn.createStatement()) {
+            long timestamp4 = timestamp1 * 1000_000 + 123123;
+            stmt.executeUpdate("import into " + ns_timestamp_db + ".weather(ts, ts2, f1) values(" + timestamp4 + ", " + timestamp4 +  ", 127)");
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts = '" + timestamp4 + "'");
+            checkCount(1l, rs);
+            rs = stmt.executeQuery("select ts from " + ns_timestamp_db + ".weather where ts = '" + timestamp4 + "'");
+            checkTime(timestamp4, rs);
+            rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts2 = '" + timestamp4 + "'");
+            checkCount(1l, rs);
+            rs = stmt.executeQuery("select ts2 from " + ns_timestamp_db + ".weather where ts2 = '" + timestamp4 + "'");
+            checkTime(timestamp4, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canSelectLastRowFromWeatherForFirstCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select last(ts) from " + ns_timestamp_db + ".weather");
+            checkTime(timestamp3, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canSelectLastRowFromWeatherForSecondCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select last(ts2) from " + ns_timestamp_db + ".weather");
+            checkTime(timestamp3, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canSelectFirstRowFromWeatherForFirstCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select first(ts) from " + ns_timestamp_db + ".weather");
+            checkTime(timestamp2, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canSelectFirstRowFromWeatherForSecondCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select first(ts2) from " + ns_timestamp_db + ".weather");
+            checkTime(timestamp2, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canQueryLargerThanInDateTypeForFirstCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts > '" + date2 + "'");
+            checkCount(1l, rs);
+            rs = stmt.executeQuery("select ts from " + ns_timestamp_db + ".weather where ts > '" + date2 + "'");
+            checkTime(timestamp3, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canQueryLargerThanInDateTypeForSecondCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts2 > '" + date2 + "'");
+            checkCount(1l, rs);
+            rs = stmt.executeQuery("select ts2 from " + ns_timestamp_db + ".weather where ts2 > '" + date2 + "'");
+            checkTime(timestamp3, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }    
+
+    @Test
+    public void canQueryLargerThanInNumberTypeForFirstCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts > '" + timestamp2 + "'");
+            checkCount(1l, rs);
+            rs = stmt.executeQuery("select ts from " + ns_timestamp_db + ".weather where ts > '" + timestamp2 + "'");
+            checkTime(timestamp3, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canQueryLargerThanInNumberTypeForSecondCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts2 > '" + timestamp2 + "'");
+            checkCount(1l, rs);
+            rs = stmt.executeQuery("select ts2 from " + ns_timestamp_db + ".weather where ts2 > '" + timestamp2 + "'");
+            checkTime(timestamp3, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canQueryLargerThanOrEqualToInDateTypeForFirstCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts >= '" + date2 + "'");
+            checkCount(2l, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canQueryLargerThanOrEqualToInDateTypeForSecondCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts2 >= '" + date2 + "'");
+            checkCount(2l, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canQueryLargerThanOrEqualToInNumberTypeForFirstCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts >= '" + timestamp2 + "'");
+            checkCount(2l, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canQueryLargerThanOrEqualToInNumberTypeForSecondCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts2 >= '" + timestamp2 + "'");
+            checkCount(2l, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }    
+
+    @Test
+    public void canQueryLessThanInDateTypeForFirstCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts < '" + date3 + "'");
+            checkCount(1l, rs);
+            rs = stmt.executeQuery("select ts from " + ns_timestamp_db + ".weather where ts < '" + date3 + "'");
+            checkTime(timestamp2, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canQueryLessThanInDateTypeForSecondCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts2 < '" + date3 + "'");
+            checkCount(1l, rs);
+            rs = stmt.executeQuery("select ts2 from " + ns_timestamp_db + ".weather where ts2 < '" + date3 + "'");
+            checkTime(timestamp2, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canQueryLessThanInNumberTypeForFirstCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts < '" + timestamp3 + "'");
+            checkCount(1l, rs);
+            rs = stmt.executeQuery("select ts from " + ns_timestamp_db + ".weather where ts < '" + timestamp3 + "'");
+            checkTime(timestamp2, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canQueryLessThanInNumberTypeForSecondCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts2 < '" + timestamp3 + "'");
+            checkCount(1l, rs);
+            rs = stmt.executeQuery("select ts2 from " + ns_timestamp_db + ".weather where ts2 < '" + timestamp3 + "'");
+            checkTime(timestamp2, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canQueryLessThanOrEqualToInDateTypeForFirstCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts <= '" + date3 + "'");
+            checkCount(2l, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canQueryLessThanOrEqualToInDateTypeForSecondCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts2 <= '" + date3 + "'");
+            checkCount(2l, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }    
+
+    @Test
+    public void canQueryLessThanOrEqualToInNumberTypeForFirstCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts <= '" + timestamp3 + "'");
+            checkCount(2l, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canQueryLessThanOrEqualToInNumberTypeForSecondCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts2 <= '" + timestamp3 + "'");
+            checkCount(2l, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canQueryBetweenAndInDateTypeForFirstCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts <= '" + date3 + "' AND ts > '" + date2 + "'");
+            checkCount(1l, rs);
+            rs = stmt.executeQuery("select ts from " + ns_timestamp_db + ".weather where ts <= '" + date3 + "' AND ts > '" + date2 + "'");
+            checkTime(timestamp3, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canQueryBetweenAndInDateTypeForSecondCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts2 <= '" + date3 + "' AND ts2 > '" + date2 + "'");
+            checkCount(1l, rs);
+            rs = stmt.executeQuery("select ts2 from " + ns_timestamp_db + ".weather where ts2 <= '" + date3 + "' AND ts2 > '" + date2 + "'");
+            checkTime(timestamp3, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canQueryBetweenAndInNumberTypeForFirstCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts <= '" + timestamp3 + "' AND ts > '" + timestamp2 + "'");
+            checkCount(1l, rs);
+            rs = stmt.executeQuery("select ts from " + ns_timestamp_db + ".weather where ts <= '" + timestamp3 + "' AND ts > '" + timestamp2 + "'");
+            checkTime(timestamp3, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canQueryBetweenAndInNumberTypeForSecondCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts2 <= '" + timestamp3 + "' AND ts2 > '" + timestamp2 + "'");
+            checkCount(1l, rs);
+            rs = stmt.executeQuery("select ts2 from " + ns_timestamp_db + ".weather where ts2 <= '" + timestamp3 + "' AND ts2 > '" + timestamp2 + "'");
+            checkTime(timestamp3, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canQueryNotEqualToInDateTypeForSecondCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts2 <> '" + date3 + "'");
+            checkCount(1l, rs);
+            rs = stmt.executeQuery("select ts2 from " + ns_timestamp_db + ".weather where ts2 <> '" + date3 + "'");
+            checkTime(timestamp2, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canQueryNotEqualToInNumberTypeForSecondCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts2 <> '" + timestamp3 + "'");
+            checkCount(1l, rs);
+            rs = stmt.executeQuery("select ts2 from " + ns_timestamp_db + ".weather where ts2 <> '" + timestamp3 + "'");
+            checkTime(timestamp2, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canQueryNotEqualInDateTypeForSecondCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts2 != '" + date3 + "'");
+            checkCount(1l, rs);
+            rs = stmt.executeQuery("select ts2 from " + ns_timestamp_db + ".weather where ts2 != '" + date3 + "'");
+            checkTime(timestamp2, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canQueryNotEqualInNumberTypeForSecondCol() {
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts2 != '" + timestamp3 + "'");
+            checkCount(1l, rs);
+            rs = stmt.executeQuery("select ts2 from " + ns_timestamp_db + ".weather where ts2 != '" + timestamp3 + "'");
+            checkTime(timestamp2, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canInsertTimestampWithNowAndNsOffsetInBothFirstAndSecondCol(){
+        try (Statement stmt = conn.createStatement()) {
+            stmt.executeUpdate("insert into " + ns_timestamp_db + ".weather(ts, ts2, f1) values(now + 1000b, now - 1000b, 128)");
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather");
+            checkCount(3l, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canIntervalAndSlidingAcceptNsUnitForFirstCol(){
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select sum(f1) from " + ns_timestamp_db + ".weather where ts >= '" + date2 + "' and ts <= '" + date3 + "' interval(10000000b) sliding(10000000b)");
+            rs.next();
+            long sum = rs.getLong(2);
+            Assert.assertEquals(127l, sum);
+            rs.next();
+            sum = rs.getLong(2);
+            Assert.assertEquals(128l, sum);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void canIntervalAndSlidingAcceptNsUnitForSecondCol(){
+        try (Statement stmt = conn.createStatement()) {
+            ResultSet rs = stmt.executeQuery("select sum(f1) from " + ns_timestamp_db + ".weather where ts2 >= '" + date2 + "' and ts <= '" + date3 + "' interval(10000000b) sliding(10000000b)");
+            rs.next();
+            long sum = rs.getLong(2);
+            Assert.assertEquals(127l, sum);
+            rs.next();
+            sum = rs.getLong(2);
+            Assert.assertEquals(128l, sum);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void testDataOutOfRangeExceptionForFirstCol() {
+        try (Statement stmt = conn.createStatement()) {
+            stmt.executeUpdate("insert into " + ns_timestamp_db + ".weather(ts, ts2, f1) values(123456789012345678, 1234567890123456789, 127)");
+        } catch (SQLException e) {
+            Assert.assertEquals("TDengine ERROR (8000060b): Timestamp data out of range", e.getMessage());
+        }
+    }
+
+    @Test
+    public void testDataOutOfRangeExceptionForSecondCol() {
+        try (Statement stmt = conn.createStatement()) {
+            stmt.executeUpdate("insert into " + ns_timestamp_db + ".weather(ts, ts2, f1) values(1234567890123456789, 123456789012345678, 127)");
+        } catch (SQLException e) {
+            Assert.assertEquals("TDengine ERROR (8000060b): Timestamp data out of range", e.getMessage());
+        }
+    }
+
+    @Test
+    public void willAutomaticallyFillToNsUnitWithZerosForFirstCol() {
+        try (Statement stmt = conn.createStatement()) {
+            stmt.executeUpdate("insert into " + ns_timestamp_db + ".weather(ts, ts2, f1) values('" + date1 + "', '" + date1 + "', 127)");
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts = '" + date1 + "000000'");
+            checkCount(1l, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void willAutomaticallyFillToNsUnitWithZerosForSecondCol() {
+        try (Statement stmt = conn.createStatement()) {
+            stmt.executeUpdate("insert into " + ns_timestamp_db + ".weather(ts, ts2, f1) values('" + date1 + "', '" + date1 + "', 127)");
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts2 = '" + date1 + "000000'");
+            checkCount(1l, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void willAutomaticallyDropDigitExceedNsDigitNumberForFirstCol() {
+        try (Statement stmt = conn.createStatement()) {
+            stmt.executeUpdate("insert into " + ns_timestamp_db + ".weather(ts, ts2, f1) values('" + date1 + "999999999', '" + date1 + "999999999', 127)");
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts = '" + date1 + "999999'");
+            checkCount(1l, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void willAutomaticallyDropDigitExceedNsDigitNumberForSecondCol() {
+        try (Statement stmt = conn.createStatement()) {
+            stmt.executeUpdate("insert into " + ns_timestamp_db + ".weather(ts, ts2, f1) values('" + date1 + "999999999', '" + date1 + "999999999', 127)");
+            ResultSet rs = stmt.executeQuery("select count(*) from " + ns_timestamp_db + ".weather where ts2 = '" + date1 + "999999'");
+            checkCount(1l, rs);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+}
diff --git a/tests/comparisonTest/tdengine/tdengineTest.c b/tests/comparisonTest/tdengine/tdengineTest.c
index d1cf3a1f98d7fa600cbaf9bcadad42428a799234..0de419e036f6af1e1808492fbb9f7b41d785b8df 100644
--- a/tests/comparisonTest/tdengine/tdengineTest.c
+++ b/tests/comparisonTest/tdengine/tdengineTest.c
@@ -181,8 +181,8 @@ void writeDataImp(void *param) {
 
       if (lastMachineid != machineid) {
         lastMachineid = machineid;
-        sqlLen += sprintf(sql + sqlLen, " dev%d using devices tags(%d,'%s',%d) values",
-                          machineid, machineid, machinename, machinegroup);
+        sqlLen += sprintf(sql + sqlLen, " dev%d values",
+                          machineid);
       }
 
       sqlLen += sprintf(sql + sqlLen, "(%" PRId64 ",%d,%f)", timestamp, temperature, humidity);
@@ -192,7 +192,8 @@ void writeDataImp(void *param) {
         result = taos_query(taos, sql);
         code = taos_errno(result);
         if (code != 0) {
-          printf("thread:%d error:%d reason:%s\n", pThread->threadId, code, taos_errstr(taos));
+          printf("insert into dev%d values (%" PRId64 ",%d,%f)\n",machineid, timestamp, temperature, humidity);
+          printf("thread:%d error:%d reason:%s\n", pThread->threadId, code, taos_errstr(result));
         }
         taos_free_result(result);
 
@@ -210,6 +211,7 @@ void writeDataImp(void *param) {
     result = taos_query(taos, sql);
     code = taos_errno(result);
     if (code != 0) {
+      // printf("insert into dev%d using devices tags(%d,'%s',%d) values (%" PRId64 ",%d,%f)",machineid, machineid, machinename, machinegroup, timestamp, temperature, humidity);
       printf("thread:%d error:%d reason:%s\n", pThread->threadId, code, taos_errstr(taos));
     }
     taos_free_result(result);
@@ -246,7 +248,7 @@ void writeData() {
   taos_free_result(result);
 
   result = taos_query(taos,
-                      "create table if not exists db.devices(ts timestamp, temperature int, humidity float) "
+                      "create stable if not exists db.devices(ts timestamp, temperature int, humidity float) "
                       "tags(devid int, devname binary(16), devgroup int)");
   code = taos_errno(result);
   if (code != 0) {
@@ -254,6 +256,77 @@ void writeData() {
   }
   taos_free_result(result);
 
+  //create tables before insert the data
+  result = taos_query(taos, "use db");
+  code = taos_errno(result);
+  if (code != 0) {
+    taos_error(result, taos);
+  }
+  taos_free_result(result);
+  
+  char *sql = calloc(1, 8*1024*1024);
+  int sqlLen = 0;
+  int lastMachineid = 0;
+  int counter = 0;
+  int totalRecords = 0;
+  for (int i = 0; i < arguments.filesNum; i++) {
+    char fileName[300];
+    sprintf(fileName, "%s/testdata%d.csv", arguments.dataDir, i);
+
+    FILE *fp = fopen(fileName, "r");
+    if (fp == NULL) {
+      printf("failed to open file %s\n", fileName);
+      exit(1);
+    }
+    printf("open file %s success\n", fileName);
+
+    char *line = NULL;
+    size_t len = 0;
+    while (!feof(fp)) {
+      free(line);
+      line = NULL;
+      len = 0;
+
+      getline(&line, &len, fp);
+      if (line == NULL) break;
+
+      if (strlen(line) < 10) continue;
+      
+      int machineid;
+      char machinename[16];
+      int machinegroup;
+      int64_t timestamp;
+      int temperature;
+      float humidity;
+      sscanf(line, "%d%s%d%" PRId64 "%d%f", &machineid, machinename, &machinegroup, &timestamp, &temperature, &humidity);
+
+      if (counter == 0) {
+        sqlLen = sprintf(sql, "create table if not exists");
+      }
+
+      if (lastMachineid != machineid) {
+        lastMachineid = machineid;
+        sqlLen += sprintf(sql + sqlLen, " dev%d using devices tags(%d,'%s',%d)", machineid, machineid, machinename, machinegroup);
+      }
+      counter++;
+
+      if (counter >= arguments.rowsPerRequest) {
+        result = taos_query(taos, sql);
+        code = taos_errno(result);
+        if (code != 0) {
+          printf("create table error:%d reason:%s\n", code, taos_errstr(result));
+        }
+        taos_free_result(result);
+
+        totalRecords += counter;
+        counter = 0;
+        lastMachineid = -1;
+        sqlLen = 0;
+      }
+    }
+    fclose(fp);    
+  }
+
   int64_t st = getTimeStampMs();
 
   int a = arguments.filesNum / arguments.clients;
@@ -379,5 +452,4 @@ void readData() {
   }
 
   free(threads);
-}
-
+}
\ No newline at end of file