MySQL kill指令使用指南

KILL [CONNECTION | QUERY] processlist_id

-- 数据库锁住acctno=13记录 然后执行如下更新语句
update test set acctname ='12' where acctno=13

 Connection connection = getConnection();
 ((MysqlConnection)connection).getSession().getThreadId();

 public void cancel() throws SQLException {
    try {
      if (this.query.getStatementExecuting().get()) {
        if (!this.isClosed && this.connection != null) {
          JdbcConnection cancelConn = null;
          Object cancelStmt = null;

          try {
            HostInfo hostInfo = this.session.getHostInfo();
            String database = hostInfo.getDatabase();
            String user = StringUtils.isNullOrEmpty(hostInfo.getUser()) ? "" : hostInfo.getUser();
            String password = StringUtils.isNullOrEmpty(hostInfo.getPassword()) ? "" : hostInfo.getPassword();
            NativeSession newSession = new NativeSession(this.session.getHostInfo(), this.session.getPropertySet());
            newSession.connect(hostInfo, user, password, database, 30000, new TransactionEventHandler() {
              public void transactionCompleted() {
              }

              public void transactionBegun() {
              }
            });
            //驱动内部使用 KILL QUERY + threadId 指令取消
            newSession.sendCommand((new NativeMessageBuilder()).buildComQuery(newSession.getSharedSendPacket(), "KILL QUERY " + this.session.getThreadId()), false, 0);
            this.setCancelStatus(CancelStatus.CANCELED_BY_USER);
          } catch (IOException var13) {
            throw SQLExceptionsMapping.translateException(var13, this.exceptionInterceptor);
          } finally {
            if (cancelStmt != null) {
              ((Statement)cancelStmt).close();
            }

            if (cancelConn != null) {
              ((JdbcConnection)cancelConn).close();
            }

          }
        }

      }
    } catch (CJException var15) {
      throw SQLExceptionsMapping.translateException(var15, this.getExceptionInterceptor());
    }
  }