Merge branch 'develop' into feature/TD-10987

documentation20/cn/00.index/docs.md

@@ -87,14 +87,14 @@ TDengine是一个高效的存储、查询、分析时序大数据的平台，专
 * [taosAdapter](/tools/adapter): TDengine 集群和应用之间的 RESTful 接口适配服务。
 * [TDinsight](/tools/insight): 监控 TDengine 集群的 Grafana 面板集合。
 * [taosdump](/tools/taosdump): TDengine 数据备份工具。使用 taosdump 请安装 taosTools。
-* [taosBenchmark](/tools/taosbenchmark): TDengine 压力测试工具。使用 taosBenchmark 请安装 taosTools。
+* [taosBenchmark](/tools/taosbenchmark): TDengine 压力测试工具。
 
 ## [与其他工具的连接](/connections)
 
 * [Grafana](/connections#grafana)：获取并可视化保存在TDengine的数据
 * [IDEA Database](https://www.taosdata.com/blog/2020/08/27/1767.html)：通过IDEA 数据库管理工具可视化使用 TDengine
-* [基于Electron开发的跨平台TDengine图形化管理工具](https://github.com/skye0207/TDengineGUI)
-* [基于DataX的TDeninge数据迁移工具](https://www.taosdata.com/blog/2021/10/26/3156.html)
+* [TDengineGUI](https://github.com/skye0207/TDengineGUI)：基于Electron开发的跨平台TDengine图形化管理工具
+* [DataX](https://www.taosdata.com/blog/2021/10/26/3156.html)：支持 TDeninge 和其他数据库之间进行数据迁移的工具
 
 ## [TDengine集群的安装、管理](/cluster)
 

documentation20/cn/02.getting-started/docs.md

@@ -45,14 +45,6 @@ sudo apt-get install tdengine
 
 <ul id="client-packagelist" class="package-list"></ul>
 
-### 安装 taosTools
-
-taosTools 是多个用于 TDengine 的辅助工具软件集合。目前包含用于数据备份恢复的 taosdump 和用于安装 grafanaplugin 和 dashboard 的脚本 TDinsight.sh。
-
-运行 taosdump 需要安装 TDengine server 或 TDengine client 安装包，推荐使用 deb 或 rpm 格式安装包，方便安装依赖软件。
-
-<ul id="taos-tools" class="package-list"></ul>
-
 ### <a class="anchor" id="source-install"></a>通过源码安装
 
 如果您希望对 TDengine 贡献代码或对内部实现感兴趣，请参考我们的 [TDengine github 主页](https://github.com/taosdata/TDengine) 下载源码构建和安装.
@@ -160,7 +152,7 @@ taos> source <filename>;
 
 ### <a class="anchor" id="taosBenchmark"></a> 使用 taosBenchmark 体验写入速度
 
-启动 TDengine 的服务，在 Linux 终端执行 `taosBenchmark` （曾命名为 taosdemo）：
+启动 TDengine 的服务，在 Linux 终端执行 `taosBenchmark` （曾命名为 taosdemo）。taosBenchmark 在 TDengine 2.4.0.7 和之前发布版本在 taosTools 安装包中发布提供，在后续版本中 taosBenchmark 将在 TDengine 标准安装包中发布。
 
 ```bash
 taosBenchmark

documentation20/en/00.index/docs.md

@@ -85,7 +85,7 @@ TDengine is a highly efficient platform to store, query, and analyze time-series
 * [taosAdapter](/tools/adapter): a bridge/adapter between TDengine cluster and applications.
 * [TDinsight](/tools/insight): monitoring TDengine cluster with Grafana.
 * [taosdump](/tools/taosdump): backup tool for TDengine. Please install `taosTools` package for it.
-* [taosBenchmark](/tools/taosbenchmark): stress test tool for TDengine. Please install `taosTools` package for it.
+* [taosBenchmark](/tools/taosbenchmark): stress test tool for TDengine.
 
 ## [Connections with Other Tools](/connections)
 
@@ -93,8 +93,8 @@ TDengine is a highly efficient platform to store, query, and analyze time-series
 - [MATLAB](/connections#matlab): access data stored in TDengine server via JDBC configured within MATLAB
 - [R](/connections#r): access data stored in TDengine server via JDBC configured within R
 - [IDEA Database](https://www.taosdata.com/blog/2020/08/27/1767.html): use TDengine visually through IDEA Database Management Tool
-- [TDengineGUI](https://github.com/skye0207/TDengineGUI)
-- [DataX, a data immigaration tool with TDeninge supported](https://github.com/taosdata/datax)
+- [TDengineGUI](https://github.com/skye0207/TDengineGUI): a TDengine management tool with Graphical User Interface
+- [DataX](https://github.com/taosdata/datax): a data immigaration tool with TDeninge supported
 
 ## [Installation and Management of TDengine Cluster](/cluster)
 

documentation20/en/02.getting-started/docs.md

@@ -45,14 +45,6 @@ If the client and server are running on different computers, you can install the
 
 <ul id="client-packagelist" class="package-list"></ul>
 
-### Install taosTools
-
-taosTools is a collection of helper software for TDengine. It currently includes taosdump for data backup and recovery and the script TDinsight.sh for installing grafanaplugin and dashboard.
-
-To run taosdump, you need to install the TDengine server or TDengine client installer. It is recommended to use the deb or rpm format to install the dependent software.
-
-<ul id="taos-tools" class="package-list"></ul>
-
 ### <a class="anchor" id="source-install"></a>Install from Source
 
 If you want to contribute to TDengine, please visit [TDengine GitHub page](https://github.com/taosdata/TDengine) for detailed instructions on build and installation from the source code.
@@ -166,7 +158,7 @@ taos> source <filename>;
 
 ### <a class="anchor" id="taosBenchmark"></a> Taste insertion speed with taosBenchmark
 
-Once the TDengine server started, you can execute the command `taosBenchmark` (which was named `taosdemo`) in the Linux terminal.
+Once the TDengine server started, you can execute the command `taosBenchmark` (which was named `taosdemo`) in the Linux terminal. In 2.4.0.7 and early release, taosBenchmark is distributed within taosTools package. In later release, taosBenchmark will be included within TDengine again. 
 
 ```bash
 taosBenchmark

src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulDriver.java

@@ -3,6 +3,7 @@ package com.taosdata.jdbc.rs;
 import com.alibaba.fastjson.JSON;
 import com.alibaba.fastjson.JSONObject;
 import com.taosdata.jdbc.*;
+import com.taosdata.jdbc.enums.TimestampFormat;
 import com.taosdata.jdbc.utils.HttpClientPoolUtil;
 import com.taosdata.jdbc.ws.InFlightRequest;
 import com.taosdata.jdbc.ws.Transport;
@@ -77,18 +78,20 @@ public class RestfulDriver extends AbstractDriver {
                 int maxRequest = props.containsKey(TSDBDriver.PROPERTY_KEY_MAX_CONCURRENT_REQUEST)
                         ? Integer.parseInt(props.getProperty(TSDBDriver.PROPERTY_KEY_MAX_CONCURRENT_REQUEST))
                         : Transport.DEFAULT_MAX_REQUEST;
+
                 InFlightRequest inFlightRequest = new InFlightRequest(timeout, maxRequest);
                 CountDownLatch latch = new CountDownLatch(1);
                 Map<String, String> httpHeaders = new HashMap<>();
-                client = new WSClient(new URI(loginUrl), user, password, database, inFlightRequest, httpHeaders, latch, maxRequest);
+                client = new WSClient(new URI(loginUrl), user, password, database,
+                        inFlightRequest, httpHeaders, latch, maxRequest);
                 transport = new Transport(client, inFlightRequest);
-                if (!client.connectBlocking()) {
+                if (!client.connectBlocking(timeout, TimeUnit.MILLISECONDS)) {
                     throw new SQLException("can't create connection with server");
                 }
                 if (!latch.await(timeout, TimeUnit.MILLISECONDS)) {
                     throw new SQLException("auth timeout");
                 }
-                if (client.isAuth()) {
+                if (!client.isAuth()) {
                     throw new SQLException("auth failure");
                 }
             } catch (URISyntaxException e) {
@@ -96,7 +99,9 @@ public class RestfulDriver extends AbstractDriver {
             } catch (InterruptedException e) {
                 throw new SQLException("creat websocket connection has been Interrupted ", e);
             }
-            return new WSConnection(url, props, transport, database, true);
+            // TODO fetch Type from config
+            props.setProperty(TSDBDriver.PROPERTY_KEY_TIMESTAMP_FORMAT, String.valueOf(TimestampFormat.TIMESTAMP));
+            return new WSConnection(url, props, transport, database);
         }
         loginUrl = "http://" + props.getProperty(TSDBDriver.PROPERTY_KEY_HOST) + ":" + props.getProperty(TSDBDriver.PROPERTY_KEY_PORT) + "/rest/login/" + user + "/" + password + "";
         int poolSize = Integer.parseInt(props.getProperty("httpPoolSize", HttpClientPoolUtil.DEFAULT_MAX_PER_ROUTE));

src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulResultSet.java

@@ -302,6 +302,9 @@ public class RestfulResultSet extends AbstractResultSet implements ResultSet {
             this.taos_type = taos_type;
         }
 
+        public int getTaosType() {
+            return taos_type;
+        }
     }
 
     @Override

src/connector/jdbc/src/main/java/com/taosdata/jdbc/ws/AbstractWSResultSet.java

+package com.taosdata.jdbc.ws;
+
+import com.taosdata.jdbc.*;
+import com.taosdata.jdbc.rs.RestfulResultSet;
+import com.taosdata.jdbc.rs.RestfulResultSetMetaData;
+import com.taosdata.jdbc.ws.entity.*;
+
+import java.sql.ResultSetMetaData;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.time.chrono.IsoChronology;
+import java.time.format.DateTimeFormatter;
+import java.time.format.DateTimeFormatterBuilder;
+import java.time.format.ResolverStyle;
+import java.time.temporal.ChronoField;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+
+public abstract class AbstractWSResultSet extends AbstractResultSet {
+    public static DateTimeFormatter rfc3339Parser = new DateTimeFormatterBuilder()
+            .parseCaseInsensitive()
+            .appendValue(ChronoField.YEAR, 4)
+            .appendLiteral('-')
+            .appendValue(ChronoField.MONTH_OF_YEAR, 2)
+            .appendLiteral('-')
+            .appendValue(ChronoField.DAY_OF_MONTH, 2)
+            .appendLiteral('T')
+            .appendValue(ChronoField.HOUR_OF_DAY, 2)
+            .appendLiteral(':')
+            .appendValue(ChronoField.MINUTE_OF_HOUR, 2)
+            .appendLiteral(':')
+            .appendValue(ChronoField.SECOND_OF_MINUTE, 2)
+            .optionalStart()
+            .appendFraction(ChronoField.NANO_OF_SECOND, 2, 9, true)
+            .optionalEnd()
+            .appendOffset("+HH:MM", "Z").toFormatter()
+            .withResolverStyle(ResolverStyle.STRICT)
+            .withChronology(IsoChronology.INSTANCE);
+
+    protected final Statement statement;
+    protected final Transport transport;
+    protected final RequestFactory factory;
+    protected final long queryId;
+
+    protected boolean isClosed;
+    // meta
+    protected final ResultSetMetaData metaData;
+    protected final List<RestfulResultSet.Field> fields = new ArrayList<>();
+    protected final List<String> columnNames;
+    protected List<Integer> fieldLength;
+    // data
+    protected List<List<Object>> result = new ArrayList<>();
+
+    protected int numOfRows = 0;
+    protected int rowIndex = 0;
+    private boolean isCompleted;
+
+    public AbstractWSResultSet(Statement statement, Transport transport, RequestFactory factory,
+                               QueryResp response, String database) throws SQLException {
+        this.statement = statement;
+        this.transport = transport;
+        this.factory = factory;
+        this.queryId = response.getId();
+        columnNames = Arrays.asList(response.getFieldsNames());
+        for (int i = 0; i < response.getFieldsCount(); i++) {
+            String colName = response.getFieldsNames()[i];
+            int taosType = response.getFieldsTypes()[i];
+            int jdbcType = TSDBConstants.taosType2JdbcType(taosType);
+            int length = response.getFieldsLengths()[i];
+            fields.add(new RestfulResultSet.Field(colName, jdbcType, length, "", taosType));
+        }
+        this.metaData = new RestfulResultSetMetaData(database, fields, null);
+        this.timestampPrecision = response.getPrecision();
+    }
+
+    private boolean forward() {
+        if (this.rowIndex > this.numOfRows) {
+            return false;
+        }
+
+        return ((++this.rowIndex) < this.numOfRows);
+    }
+
+    public void reset() {
+        this.rowIndex = 0;
+    }
+
+    @Override
+    public boolean next() throws SQLException {
+        if (isClosed()) {
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_RESULTSET_CLOSED);
+        }
+
+        if (this.forward()) {
+            return true;
+        }
+
+        Request request = factory.generateFetch(queryId);
+        CompletableFuture<Response> send = transport.send(request);
+        try {
+            Response response = send.get();
+            FetchResp fetchResp = (FetchResp) response;
+            if (Code.SUCCESS.getCode() != fetchResp.getCode()) {
+//                TODO reWrite error type
+                throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNKNOWN, fetchResp.getMessage());
+            }
+            this.reset();
+            if (fetchResp.isCompleted()) {
+                this.isCompleted = true;
+                return false;
+            }
+            fieldLength = Arrays.asList(fetchResp.getLengths());
+            this.numOfRows = fetchResp.getRows();
+            this.result = fetchJsonData();
+            return true;
+        } catch (InterruptedException | ExecutionException e) {
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_RESTFul_Client_IOException, e.getMessage());
+        }
+    }
+
+    public abstract List<List<Object>> fetchJsonData() throws SQLException, ExecutionException, InterruptedException;
+
+    @Override
+    public void close() throws SQLException {
+        this.isClosed = true;
+        if (result != null && !result.isEmpty() && !isCompleted) {
+            FetchReq fetchReq = new FetchReq(queryId, queryId);
+            transport.sendWithoutRep(new Request(Action.FREE_RESULT.getAction(), fetchReq));
+        }
+    }
+
+    @Override
+    public ResultSetMetaData getMetaData() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_RESULTSET_CLOSED);
+        return this.metaData;
+    }
+
+    @Override
+    public boolean isClosed() throws SQLException {
+        return isClosed;
+    }
+}

src/connector/jdbc/src/main/java/com/taosdata/jdbc/ws/InFlightRequest.java

 package com.taosdata.jdbc.ws;
 
+import com.taosdata.jdbc.ws.entity.Action;
+
+import java.util.HashMap;
 import java.util.Map;
 import java.util.concurrent.*;
 
 /**
  * Unfinished execution
  */
-public class InFlightRequest implements AutoCloseable {
+public class InFlightRequest {
     private final int timeoutSec;
     private final Semaphore semaphore;
-    private final Map<String, ResponseFuture> futureMap = new ConcurrentHashMap<>();
-    private final ScheduledExecutorService scheduledExecutorService = Executors.newSingleThreadScheduledExecutor();
-    private final ScheduledFuture<?> scheduledFuture;
+    private final Map<String, ConcurrentHashMap<Long, ResponseFuture>> futureMap = new HashMap<>();
+    private final Map<String, PriorityBlockingQueue<ResponseFuture>> expireMap = new HashMap<>();
+    private final ScheduledExecutorService scheduledExecutorService = Executors.newSingleThreadScheduledExecutor(r -> {
+        Thread t = new Thread(r);
+        t.setName("timer-" + t.getId());
+        return t;
+    });
 
     public InFlightRequest(int timeoutSec, int concurrentNum) {
         this.timeoutSec = timeoutSec;
         this.semaphore = new Semaphore(concurrentNum);
-        this.scheduledFuture = scheduledExecutorService.scheduleAtFixedRate(this::removeTimeoutFuture, timeoutSec, timeoutSec, TimeUnit.MILLISECONDS);
+        scheduledExecutorService.scheduleWithFixedDelay(this::removeTimeoutFuture,
+                timeoutSec, timeoutSec, TimeUnit.MILLISECONDS);
+        Runtime.getRuntime().addShutdownHook(new Thread(scheduledExecutorService::shutdown));
+        for (Action value : Action.values()) {
+            String action = value.getAction();
+            if (Action.CONN.getAction().equals(action))
+                continue;
+            futureMap.put(action, new ConcurrentHashMap<>());
+            expireMap.put(action, new PriorityBlockingQueue<>());
+        }
     }
 
-    public void put(ResponseFuture responseFuture) throws InterruptedException, TimeoutException {
+    public void put(ResponseFuture rf) throws InterruptedException, TimeoutException {
         if (semaphore.tryAcquire(timeoutSec, TimeUnit.MILLISECONDS)) {
-            futureMap.put(responseFuture.getId(), responseFuture);
+            futureMap.get(rf.getAction()).put(rf.getId(), rf);
+            expireMap.get(rf.getAction()).put(rf);
         } else {
             throw new TimeoutException();
         }
     }
 
-    public ResponseFuture remove(String id) {
-        ResponseFuture future = futureMap.remove(id);
+    public ResponseFuture remove(String action, Long id) {
+        ResponseFuture future = futureMap.get(action).remove(id);
         if (null != future) {
+            expireMap.get(action).remove(future);
             semaphore.release();
         }
         return future;
     }
 
     private void removeTimeoutFuture() {
-        futureMap.entrySet().removeIf(entry -> {
-            if (System.nanoTime() - entry.getValue().getTimestamp() > timeoutSec * 1_000_000L) {
+        expireMap.forEach((k, v) -> {
+            while (true) {
+                ResponseFuture response = v.peek();
+                if (null == response || (System.nanoTime() - response.getTimestamp()) < timeoutSec * 1_000_000L)
+                    break;
+
                 try {
-                    entry.getValue().getFuture().completeExceptionally(new TimeoutException());
-                }finally {
+                    v.poll();
+                    futureMap.get(k).remove(response.getId());
+                    response.getFuture().completeExceptionally(new TimeoutException());
+                } finally {
                     semaphore.release();
                 }
-                return true;
-            } else {
-                return false;
             }
         });
     }
-
-    @Override
-    public void close() {
-        scheduledFuture.cancel(true);
-        scheduledExecutorService.shutdown();
-    }
 }

src/connector/jdbc/src/main/java/com/taosdata/jdbc/ws/ResponseFuture.java

@@ -4,18 +4,24 @@ import com.taosdata.jdbc.ws.entity.Response;
 
 import java.util.concurrent.CompletableFuture;
 
-public class ResponseFuture {
-    private final String id;
+public class ResponseFuture implements Comparable<ResponseFuture> {
+    private final String action;
+    private final Long id;
     private final CompletableFuture<Response> future;
     private final long timestamp;
 
-    public ResponseFuture(String id, CompletableFuture<Response> future) {
+    public ResponseFuture(String action, Long id, CompletableFuture<Response> future) {
+        this.action = action;
         this.id = id;
         this.future = future;
         timestamp = System.nanoTime();
     }
 
-    public String getId() {
+    public String getAction() {
+        return action;
+    }
+
+    public Long getId() {
         return id;
     }
 
@@ -26,4 +32,12 @@ public class ResponseFuture {
     long getTimestamp() {
         return timestamp;
     }
+
+    @Override
+    public int compareTo(ResponseFuture rf) {
+        long r = this.timestamp - rf.timestamp;
+        if (r > 0) return 1;
+        if (r < 0) return -1;
+        return 0;
+    }
 }

src/connector/jdbc/src/main/java/com/taosdata/jdbc/ws/Transport.java

@@ -25,15 +25,19 @@ public class Transport implements AutoCloseable {
     public CompletableFuture<Response> send(Request request) {
         CompletableFuture<Response> completableFuture = new CompletableFuture<>();
         try {
-            inFlightRequest.put(new ResponseFuture(request.id(), completableFuture));
+            inFlightRequest.put(new ResponseFuture(request.getAction(), request.id(), completableFuture));
             client.send(request.toString());
         } catch (Throwable t) {
-            inFlightRequest.remove(request.id());
+            inFlightRequest.remove(request.getAction(), request.id());
             completableFuture.completeExceptionally(t);
         }
         return completableFuture;
     }
 
+    public void sendWithoutRep(Request request) {
+        client.send(request.toString());
+    }
+
     public boolean isClosed() throws SQLException {
         return client.isClosed();
     }

src/connector/jdbc/src/main/java/com/taosdata/jdbc/ws/WSClient.java

@@ -7,6 +7,8 @@ import org.java_websocket.handshake.ServerHandshake;
 
 import java.net.URI;
 import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.charset.StandardCharsets;
 import java.util.Map;
 import java.util.concurrent.*;
 
@@ -20,6 +22,7 @@ public class WSClient extends WebSocketClient implements AutoCloseable {
     ThreadPoolExecutor executor;
 
     private boolean auth;
+    private int reqId;
 
     public boolean isAuth() {
         return auth;
@@ -54,8 +57,8 @@ public class WSClient extends WebSocketClient implements AutoCloseable {
     @Override
     public void onOpen(ServerHandshake serverHandshake) {
         // certification
-        Request request = Request.generateConnect(user, password, database);
-        this.send(request.toString());
+        ConnectReq connectReq = new ConnectReq(++reqId, user, password, database);
+        this.send(new Request(Action.CONN.getAction(), connectReq).toString());
     }
 
     @Override
@@ -64,14 +67,15 @@ public class WSClient extends WebSocketClient implements AutoCloseable {
             executor.submit(() -> {
                 JSONObject jsonObject = JSONObject.parseObject(message);
                 if (Action.CONN.getAction().equals(jsonObject.getString("action"))) {
-                    latch.countDown();
                     if (Code.SUCCESS.getCode() != jsonObject.getInteger("code")) {
-                        auth = false;
                         this.close();
+                    } else {
+                        auth = true;
                     }
+                    latch.countDown();
                 } else {
                     Response response = parseMessage(jsonObject);
-                    ResponseFuture remove = inFlightRequest.remove(response.id());
+                    ResponseFuture remove = inFlightRequest.remove(response.getAction(), response.getReqId());
                     if (null != remove) {
                         remove.getFuture().complete(response);
                     }
@@ -87,7 +91,14 @@ public class WSClient extends WebSocketClient implements AutoCloseable {
 
     @Override
     public void onMessage(ByteBuffer bytes) {
-        super.onMessage(bytes);
+        bytes.order(ByteOrder.LITTLE_ENDIAN);
+        long id = bytes.getLong();
+        ResponseFuture remove = inFlightRequest.remove(Action.FETCH_BLOCK.getAction(), id);
+        if (null != remove) {
+//            FetchBlockResp fetchBlockResp = new FetchBlockResp(id, bytes.slice());
+            FetchBlockResp fetchBlockResp = new FetchBlockResp(id, bytes);
+            remove.getFuture().complete(fetchBlockResp);
+        }
     }
 
     @Override
@@ -97,7 +108,6 @@ public class WSClient extends WebSocketClient implements AutoCloseable {
         } else {
             throw new RuntimeException("close connection: " + reason);
         }
-
     }
 
     @Override
@@ -109,6 +119,42 @@ public class WSClient extends WebSocketClient implements AutoCloseable {
     public void close() {
         super.close();
         executor.shutdown();
-        inFlightRequest.close();
+    }
+
+    static class ConnectReq extends Payload {
+        private String user;
+        private String password;
+        private String db;
+
+        public ConnectReq(long reqId, String user, String password, String db) {
+            super(reqId);
+            this.user = user;
+            this.password = password;
+            this.db = db;
+        }
+
+        public String getUser() {
+            return user;
+        }
+
+        public void setUser(String user) {
+            this.user = user;
+        }
+
+        public String getPassword() {
+            return password;
+        }
+
+        public void setPassword(String password) {
+            this.password = password;
+        }
+
+        public String getDb() {
+            return db;
+        }
+
+        public void setDb(String db) {
+            this.db = db;
+        }
     }
 }

src/connector/jdbc/src/main/java/com/taosdata/jdbc/ws/WSConnection.java

@@ -5,6 +5,7 @@ import com.taosdata.jdbc.TSDBDriver;
 import com.taosdata.jdbc.TSDBError;
 import com.taosdata.jdbc.TSDBErrorNumbers;
 import com.taosdata.jdbc.rs.RestfulDatabaseMetaData;
+import com.taosdata.jdbc.ws.entity.RequestFactory;
 
 import java.sql.DatabaseMetaData;
 import java.sql.PreparedStatement;
@@ -16,14 +17,14 @@ public class WSConnection extends AbstractConnection {
     private final Transport transport;
     private final DatabaseMetaData metaData;
     private final String database;
-    private boolean fetchType;
+    private final RequestFactory factory;
 
-    public WSConnection(String url, Properties properties, Transport transport, String database, boolean fetchType) {
+    public WSConnection(String url, Properties properties, Transport transport, String database) {
         super(properties);
         this.transport = transport;
         this.database = database;
-        this.fetchType = fetchType;
         this.metaData = new RestfulDatabaseMetaData(url, properties.getProperty(TSDBDriver.PROPERTY_KEY_USER), this);
+        this.factory = new RequestFactory();
     }
 
     @Override
@@ -31,8 +32,7 @@ public class WSConnection extends AbstractConnection {
         if (isClosed())
             throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
 
-//        return new WSStatement(transport, database , fetchType);
-        return null;
+        return new WSStatement(transport, database, this, factory);
     }
 
     @Override

src/connector/jdbc/src/main/java/com/taosdata/jdbc/ws/WSStatement.java

+package com.taosdata.jdbc.ws;
+
+import com.taosdata.jdbc.AbstractStatement;
+import com.taosdata.jdbc.TSDBError;
+import com.taosdata.jdbc.TSDBErrorNumbers;
+import com.taosdata.jdbc.utils.SqlSyntaxValidator;
+import com.taosdata.jdbc.ws.entity.*;
+
+import java.sql.Connection;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+
+public class WSStatement extends AbstractStatement {
+    private final Transport transport;
+    private final String database;
+    private final Connection connection;
+    private final RequestFactory factory;
+
+    private boolean closed;
+    private ResultSet resultSet;
+
+    public WSStatement(Transport transport, String database, Connection connection, RequestFactory factory) {
+        this.transport = transport;
+        this.database = database;
+        this.connection = connection;
+        this.factory = factory;
+    }
+
+    @Override
+    public ResultSet executeQuery(String sql) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+        if (!SqlSyntaxValidator.isValidForExecuteQuery(sql))
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_INVALID_FOR_EXECUTE_QUERY, "not a valid sql for executeQuery: " + sql);
+
+        this.execute(sql);
+        return this.resultSet;
+    }
+
+    @Override
+    public int executeUpdate(String sql) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+        if (!SqlSyntaxValidator.isValidForExecuteUpdate(sql))
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_INVALID_FOR_EXECUTE_UPDATE, "not a valid sql for executeUpdate: " + sql);
+
+        this.execute(sql);
+        return affectedRows;
+    }
+
+    @Override
+    public void close() throws SQLException {
+        if (!isClosed())
+            this.closed = true;
+    }
+
+    @Override
+    public boolean execute(String sql) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+
+        Request request = factory.generateQuery(sql);
+        CompletableFuture<Response> send = transport.send(request);
+
+        Response response;
+        try {
+            response = send.get();
+            QueryResp queryResp = (QueryResp) response;
+            if (Code.SUCCESS.getCode() != queryResp.getCode()) {
+                throw TSDBError.createSQLException(queryResp.getCode(), queryResp.getMessage());
+            }
+            if (queryResp.isUpdate()) {
+                this.resultSet = null;
+                this.affectedRows = queryResp.getAffectedRows();
+                return false;
+            } else {
+                this.resultSet = new BlockResultSet(this, this.transport, this.factory, queryResp, this.database);
+                this.affectedRows = -1;
+                return true;
+            }
+        } catch (InterruptedException | ExecutionException e) {
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_INVALID_WITH_EXECUTEQUERY, e.getMessage());
+        }
+    }
+
+    @Override
+    public ResultSet getResultSet() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+        return this.resultSet;
+    }
+
+    @Override
+    public int getUpdateCount() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+
+        return affectedRows;
+    }
+
+    @Override
+    public Connection getConnection() throws SQLException {
+        return this.connection;
+    }
+
+    @Override
+    public boolean isClosed() throws SQLException {
+        return closed;
+    }
+}

src/connector/jdbc/src/main/java/com/taosdata/jdbc/ws/entity/Action.java

@@ -11,8 +11,9 @@ public enum Action {
     QUERY("query", QueryResp.class),
     FETCH("fetch", FetchResp.class),
     FETCH_JSON("fetch_json", FetchJsonResp.class),
-    // fetch_block's class is meaningless
-    FETCH_BLOCK("fetch_block", Response.class),
+    FETCH_BLOCK("fetch_block", FetchBlockResp.class),
+    // free_result's class is meaningless
+    FREE_RESULT("free_result", Response.class),
     ;
     private final String action;
     private final Class<? extends Response> clazz;
@@ -35,7 +36,6 @@ public enum Action {
     static {
         for (Action value : Action.values()) {
             actions.put(value.action, value);
-            IdUtil.init(value.action);
         }
     }
 

src/connector/jdbc/src/main/java/com/taosdata/jdbc/ws/entity/Code.java

@@ -5,7 +5,6 @@ package com.taosdata.jdbc.ws.entity;
  */
 public enum Code {
     SUCCESS(0, "success"),
-
     ;
 
     private final int code;

src/connector/jdbc/src/main/java/com/taosdata/jdbc/ws/entity/FetchBlockResp.java

 package com.taosdata.jdbc.ws.entity;
 
-public class FetchBlockResp {
+import java.nio.ByteBuffer;
+
+public class FetchBlockResp extends Response {
+    private ByteBuffer buffer;
+
+    public FetchBlockResp(long id, ByteBuffer buffer) {
+        this.setAction(Action.FETCH_BLOCK.getAction());
+        this.setReqId(id);
+        this.buffer = buffer;
+    }
+
+    public ByteBuffer getBuffer() {
+        return buffer;
+    }
+
+    public void setBuffer(ByteBuffer buffer) {
+        this.buffer = buffer;
+    }
 }

src/connector/jdbc/src/main/java/com/taosdata/jdbc/ws/entity/FetchJsonResp.java

 package com.taosdata.jdbc.ws.entity;
 
+import com.alibaba.fastjson.JSONArray;
+
 public class FetchJsonResp extends Response{
     private long id;
-    private Object[][] data;
+    private JSONArray data;
 
-    public Object[][] getData() {
+    public JSONArray getData() {
         return data;
     }
 
-    public void setData(Object[][] data) {
+    public void setData(JSONArray data) {
         this.data = data;
     }
 

src/connector/jdbc/src/main/java/com/taosdata/jdbc/ws/entity/FetchReq.java

+package com.taosdata.jdbc.ws.entity;
+
+public class FetchReq extends Payload {
+    private long id;
+
+    public FetchReq(long reqId, long id) {
+        super(reqId);
+        this.id = id;
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+}

src/connector/jdbc/src/main/java/com/taosdata/jdbc/ws/entity/FetchResp.java

@@ -8,7 +8,7 @@ public class FetchResp extends Response{
     private String message;
     private long id;
     private boolean completed;
-    private int[] lengths;
+    private Integer[] lengths;
     private int rows;
 
     public int getCode() {
@@ -43,11 +43,11 @@ public class FetchResp extends Response{
         this.completed = completed;
     }
 
-    public int[] getLengths() {
+    public Integer[] getLengths() {
         return lengths;
     }
 
-    public void setLengths(int[] lengths) {
+    public void setLengths(Integer[] lengths) {
         this.lengths = lengths;
     }
 

src/connector/jdbc/src/main/java/com/taosdata/jdbc/ws/entity/IdUtil.java

-package com.taosdata.jdbc.ws.entity;
-
-import java.util.HashMap;
-import java.util.Map;
-import java.util.concurrent.atomic.AtomicLong;
-
-/**
- * generate id for request
- */
-public class IdUtil {
-    private static final Map<String, AtomicLong> ids = new HashMap<>();
-
-    public static long getId(String action) {
-        return ids.get(action).incrementAndGet();
-    }
-
-    public static void init(String action) {
-        ids.put(action, new AtomicLong(0));
-    }
-}

src/connector/jdbc/src/main/java/com/taosdata/jdbc/ws/entity/Payload.java

+package com.taosdata.jdbc.ws.entity;
+
+import com.alibaba.fastjson.annotation.JSONField;
+
+public class Payload {
+    @JSONField(name = "req_id")
+    private final long reqId;
+
+    public Payload(long reqId) {
+        this.reqId = reqId;
+    }
+
+    public long getReqId() {
+        return reqId;
+    }
+}
\ No newline at end of file

src/connector/jdbc/src/main/java/com/taosdata/jdbc/ws/entity/QueryReq.java

+package com.taosdata.jdbc.ws.entity;
+
+public class QueryReq extends Payload {
+    private String sql;
+
+    public QueryReq(long reqId, String sql) {
+        super(reqId);
+        this.sql = sql;
+    }
+
+    public String getSql() {
+        return sql;
+    }
+
+    public void setSql(String sql) {
+        this.sql = sql;
+    }
+}

src/connector/jdbc/src/main/java/com/taosdata/jdbc/ws/entity/Request.java

 package com.taosdata.jdbc.ws.entity;
 
 import com.alibaba.fastjson.JSON;
-import com.alibaba.fastjson.annotation.JSONField;
 
 /**
  * send to taosadapter
@@ -15,14 +14,14 @@ public class Request {
         this.args = args;
     }
 
-    public String id() {
-        return action + "_" + args.getReqId();
-    }
-
     public String getAction() {
         return action;
     }
 
+    public Long id(){
+        return args.getReqId();
+    }
+
     public void setAction(String action) {
         this.action = action;
     }
@@ -39,118 +38,4 @@ public class Request {
     public String toString() {
         return JSON.toJSONString(this);
     }
-
-    public static Request generateConnect(String user, String password, String db) {
-        long reqId = IdUtil.getId(Action.CONN.getAction());
-        ConnectReq connectReq = new ConnectReq(reqId, user, password, db);
-        return new Request(Action.CONN.getAction(), connectReq);
-    }
-
-    public static Request generateQuery(String sql) {
-        long reqId = IdUtil.getId(Action.QUERY.getAction());
-        QueryReq queryReq = new QueryReq(reqId, sql);
-        return new Request(Action.QUERY.getAction(), queryReq);
-    }
-
-    public static Request generateFetch(long id) {
-        long reqId = IdUtil.getId(Action.FETCH.getAction());
-        FetchReq fetchReq = new FetchReq(reqId, id);
-        return new Request(Action.FETCH.getAction(), fetchReq);
-    }
-
-    public static Request generateFetchJson(long id) {
-        long reqId = IdUtil.getId(Action.FETCH_JSON.getAction());
-        FetchReq fetchReq = new FetchReq(reqId, id);
-        return new Request(Action.FETCH_JSON.getAction(), fetchReq);
-    }
-
-    public static Request generateFetchBlock(long id) {
-        long reqId = IdUtil.getId(Action.FETCH_BLOCK.getAction());
-        FetchReq fetchReq = new FetchReq(reqId, id);
-        return new Request(Action.FETCH_BLOCK.getAction(), fetchReq);
-    }
-}
-
-class Payload {
-    @JSONField(name = "req_id")
-    private final long reqId;
-
-    public Payload(long reqId) {
-        this.reqId = reqId;
-    }
-
-    public long getReqId() {
-        return reqId;
-    }
-}
-
-class ConnectReq extends Payload {
-    private String user;
-    private String password;
-    private String db;
-
-    public ConnectReq(long reqId, String user, String password, String db) {
-        super(reqId);
-        this.user = user;
-        this.password = password;
-        this.db = db;
-    }
-
-    public String getUser() {
-        return user;
-    }
-
-    public void setUser(String user) {
-        this.user = user;
-    }
-
-    public String getPassword() {
-        return password;
-    }
-
-    public void setPassword(String password) {
-        this.password = password;
-    }
-
-    public String getDb() {
-        return db;
-    }
-
-    public void setDb(String db) {
-        this.db = db;
-    }
-}
-
-class QueryReq extends Payload {
-    private String sql;
-
-    public QueryReq(long reqId, String sql) {
-        super(reqId);
-        this.sql = sql;
-    }
-
-    public String getSql() {
-        return sql;
-    }
-
-    public void setSql(String sql) {
-        this.sql = sql;
-    }
-}
-
-class FetchReq extends Payload {
-    private long id;
-
-    public FetchReq(long reqId, long id) {
-        super(reqId);
-        this.id = id;
-    }
-
-    public long getId() {
-        return id;
-    }
-
-    public void setId(long id) {
-        this.id = id;
-    }
 }
\ No newline at end of file

src/connector/jdbc/src/main/java/com/taosdata/jdbc/ws/entity/RequestFactory.java

+package com.taosdata.jdbc.ws.entity;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.atomic.AtomicLong;
+
+/**
+ * generate id for request
+ */
+public class RequestFactory {
+    private final Map<String, AtomicLong> ids = new HashMap<>();
+
+    public long getId(String action) {
+        return ids.get(action).incrementAndGet();
+    }
+
+    public RequestFactory() {
+        for (Action value : Action.values()) {
+            String action = value.getAction();
+            if (Action.CONN.getAction().equals(action) || Action.FETCH_BLOCK.getAction().equals(action))
+                continue;
+            ids.put(action, new AtomicLong(0));
+        }
+    }
+
+    public Request generateQuery(String sql) {
+        long reqId = this.getId(Action.QUERY.getAction());
+        QueryReq queryReq = new QueryReq(reqId, sql);
+        return new Request(Action.QUERY.getAction(), queryReq);
+    }
+
+    public Request generateFetch(long id) {
+        long reqId = this.getId(Action.FETCH.getAction());
+        FetchReq fetchReq = new FetchReq(reqId, id);
+        return new Request(Action.FETCH.getAction(), fetchReq);
+    }
+
+    public Request generateFetchJson(long id) {
+        long reqId = this.getId(Action.FETCH_JSON.getAction());
+        FetchReq fetchReq = new FetchReq(reqId, id);
+        return new Request(Action.FETCH_JSON.getAction(), fetchReq);
+    }
+
+    public Request generateFetchBlock(long id) {
+        FetchReq fetchReq = new FetchReq(id, id);
+        return new Request(Action.FETCH_BLOCK.getAction(), fetchReq);
+    }
+}

src/connector/jdbc/src/main/java/com/taosdata/jdbc/ws/entity/Response.java

@@ -11,10 +11,6 @@ public class Response {
     @JSONField(name = "req_id")
     private long reqId;
 
-    public String id() {
-        return action + "_" + reqId;
-    }
-
     public String getAction() {
         return action;
     }

src/connector/jdbc/src/test/java/com/taosdata/jdbc/ws/WSConnectionTest.java

@@ -10,15 +10,17 @@ import org.junit.runner.RunWith;
 
 import java.sql.*;
 import java.util.Properties;
+import java.util.concurrent.TimeUnit;
 
 /**
  * You need to start taosadapter before testing this method
  */
 @Ignore
 @RunWith(CatalogRunner.class)
-@TestTarget(alias = "test connection with server", author = "huolibo",version = "2.0.37")
+@TestTarget(alias = "test connection with server", author = "huolibo", version = "2.0.37")
 public class WSConnectionTest {
-    private static final String host = "192.168.1.98";
+//    private static final String host = "192.168.1.98";
+    private static final String host = "127.0.0.1";
     private static final int port = 6041;
     private Connection connection;
 
@@ -46,13 +48,12 @@ public class WSConnectionTest {
         String url = "jdbc:TAOS-RS://" + host + ":" + port + "/";
         Properties properties = new Properties();
         properties.setProperty(TSDBDriver.PROPERTY_KEY_USER, "root");
-        properties.setProperty(TSDBDriver.PROPERTY_KEY_PASSWORD,"taosdata");
+        properties.setProperty(TSDBDriver.PROPERTY_KEY_PASSWORD, "taosdata");
         properties.setProperty(TSDBDriver.PROPERTY_KEY_BATCH_LOAD, "true");
         connection = DriverManager.getConnection(url, properties);
     }
 
-    @Test
-//    @Test(expected = SQLException.class)
+    @Test(expected = SQLException.class)
     @Description("wrong password or user")
     public void wrongUserOrPasswordConection() throws SQLException {
         String url = "jdbc:TAOS-RS://" + host + ":" + port + "/test?user=abc&password=taosdata";
@@ -60,4 +61,21 @@ public class WSConnectionTest {
         properties.setProperty(TSDBDriver.PROPERTY_KEY_BATCH_LOAD, "true");
         connection = DriverManager.getConnection(url, properties);
     }
+
+    @Test
+    @Description("sleep keep connection")
+    public void keepConnection() throws SQLException, InterruptedException {
+        String url = "jdbc:TAOS-RS://" + host + ":" + port + "/?user=root&password=taosdata";
+        Properties properties = new Properties();
+        properties.setProperty(TSDBDriver.PROPERTY_KEY_BATCH_LOAD, "true");
+        connection = DriverManager.getConnection(url, properties);
+        TimeUnit.MINUTES.sleep(1);
+        Statement statement = connection.createStatement();
+        ResultSet resultSet = statement.executeQuery("show databases");
+        TimeUnit.MINUTES.sleep(1);
+        resultSet.next();
+        System.out.println(resultSet.getTimestamp(1));
+        resultSet.close();
+        statement.close();
+    }
 }

src/connector/jdbc/src/test/java/com/taosdata/jdbc/ws/WSQueryTest.java

+package com.taosdata.jdbc.ws;
+
+import com.taosdata.jdbc.TSDBDriver;
+import com.taosdata.jdbc.annotation.CatalogRunner;
+import com.taosdata.jdbc.annotation.Description;
+import com.taosdata.jdbc.annotation.TestTarget;
+import org.junit.*;
+import org.junit.runner.RunWith;
+
+import java.sql.*;
+import java.util.Properties;
+import java.util.concurrent.TimeUnit;
+import java.util.stream.IntStream;
+
+@Ignore
+@RunWith(CatalogRunner.class)
+@TestTarget(alias = "query test", author = "huolibo", version = "2.0.38")
+@FixMethodOrder
+public class WSQueryTest {
+    private static final String host = "192.168.1.98";
+    private static final int port = 6041;
+    private static final String databaseName = "ws_query";
+    private static final String tableName = "wq";
+    private Connection connection;
+    private long now;
+
+    @Description("query")
+    @Test
+    public void queryBlock() throws SQLException, InterruptedException {
+        IntStream.range(1, 100).limit(1000).parallel().forEach(x -> {
+            try {
+                Statement statement = connection.createStatement();
+
+                statement.execute("insert into " + databaseName + "." + tableName + " values(now+100s, 100)");
+
+                ResultSet resultSet = statement.executeQuery("select * from " + databaseName + "." + tableName);
+                resultSet.next();
+                Assert.assertEquals(100, resultSet.getInt(2));
+                statement.close();
+                TimeUnit.SECONDS.sleep(10);
+            } catch (SQLException e) {
+                e.printStackTrace();
+            } catch (InterruptedException e) {
+                e.printStackTrace();
+            }
+        });
+    }
+
+    @Before
+    public void before() throws SQLException {
+        String url = "jdbc:TAOS-RS://" + host + ":" + port + "/test?user=root&password=taosdata";
+        Properties properties = new Properties();
+        properties.setProperty(TSDBDriver.PROPERTY_KEY_BATCH_LOAD, "true");
+        connection = DriverManager.getConnection(url, properties);
+        Statement statement = connection.createStatement();
+        statement.execute("drop database if exists " + databaseName);
+        statement.execute("create database " + databaseName);
+        statement.execute("use " + databaseName);
+        statement.execute("create table if not exists " + databaseName + "." + tableName + "(ts timestamp, f int)");
+        statement.close();
+    }
+}

src/connector/jdbc/src/test/java/com/taosdata/jdbc/ws/WSSelectTest.java

+package com.taosdata.jdbc.ws;
+
+import com.taosdata.jdbc.TSDBDriver;
+import com.taosdata.jdbc.enums.TimestampFormat;
+import org.junit.BeforeClass;
+import org.junit.Ignore;
+import org.junit.Test;
+
+import java.sql.*;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Properties;
+import java.util.concurrent.TimeUnit;
+
+@Ignore
+public class WSSelectTest {
+    //    private static final String host = "192.168.1.98";
+    private static final String host = "127.0.0.1";
+    private static final int port = 6041;
+    private static Connection connection;
+    private static final String databaseName = "driver";
+
+    private static void testInsert() throws SQLException {
+        Statement statement = connection.createStatement();
+        long cur = System.currentTimeMillis();
+        List<String> timeList = new ArrayList<>();
+        for (long i = 0L; i < 3000; i++) {
+            long t = cur + i;
+            timeList.add("insert into " + databaseName + ".alltype_query values(" + t + ",1,1,1,1,1,1,1,1,1,1,1,'test_binary','test_nchar')");
+        }
+        for (int i = 0; i < 3000; i++) {
+            statement.execute(timeList.get(i));
+        }
+        statement.close();
+    }
+
+    @Test
+    public void testWSSelect() throws SQLException {
+        Statement statement = connection.createStatement();
+        int count = 0;
+        long start = System.nanoTime();
+        for (int i = 0; i < 1000; i++) {
+            ResultSet resultSet = statement.executeQuery("select ts,c1,c2,c3,c4,c5,c6,c7,c8,c9,c10,c11,c12,c13 from " + databaseName + ".alltype_query limit 3000");
+            while (resultSet.next()) {
+                count++;
+                resultSet.getTimestamp(1);
+                resultSet.getBoolean(2);
+                resultSet.getInt(3);
+                resultSet.getInt(4);
+                resultSet.getInt(5);
+                resultSet.getLong(6);
+                resultSet.getInt(7);
+                resultSet.getInt(8);
+                resultSet.getLong(9);
+                resultSet.getLong(10);
+                resultSet.getFloat(11);
+                resultSet.getDouble(12);
+                resultSet.getString(13);
+                resultSet.getString(14);
+            }
+        }
+        long d = System.nanoTime() - start;
+        System.out.println(d / 1000);
+        System.out.println(count);
+        statement.close();
+    }
+
+    @BeforeClass
+    public static void beforeClass() throws SQLException {
+        String url = "jdbc:TAOS-RS://" + host + ":" + port + "/?user=root&password=taosdata";
+        Properties properties = new Properties();
+        properties.setProperty(TSDBDriver.PROPERTY_KEY_TIMESTAMP_FORMAT, String.valueOf(TimestampFormat.UTC));
+        properties.setProperty(TSDBDriver.PROPERTY_KEY_MESSAGE_WAIT_TIMEOUT, "100000");
+        properties.setProperty(TSDBDriver.PROPERTY_KEY_BATCH_LOAD, "true");
+        connection = DriverManager.getConnection(url, properties);
+        Statement statement = connection.createStatement();
+        statement.execute("drop database if exists " + databaseName);
+        statement.execute("create database " + databaseName);
+        statement.execute("create table " + databaseName + ".alltype_query(ts timestamp, c1 bool,c2 tinyint, c3 smallint, c4 int, c5 bigint, c6 tinyint unsigned, c7 smallint unsigned, c8 int unsigned, c9 bigint unsigned, c10 float, c11 double, c12 binary(20), c13 nchar(30) )");
+        statement.close();
+        testInsert();
+    }
+}

taos-tools @ ca4a9002

-Subproject commit ecc3f50cfb868da22c716ffbcda7b6c40c9180fa
+Subproject commit ca4a90027ddfd5faa858a676e695ddcdd56ef2b5