Merge branch 'develop' into feature/TD-2577

.travis.yml

@@ -171,6 +171,8 @@ matrix:
           - build-essential
           - cmake
           - binutils-2.26
+          - unixodbc
+          - unixodbc-dev
     env: 
       - DESC="trusty/gcc-4.8/bintuils-2.26 build"
 
@@ -198,6 +200,8 @@ matrix:
         packages:
           - build-essential
           - cmake
+          - unixodbc
+          - unixodbc-dev
 
     before_script:
       - export TZ=Asia/Harbin
@@ -252,6 +256,8 @@ matrix:
         packages:
           - build-essential
           - cmake
+          - unixodbc
+          - unixodbc-dev
     env:
       - DESC="arm64 xenial build"
 
@@ -280,6 +286,7 @@ matrix:
     addons:
       homebrew:
         - cmake
+        - unixodbc
 
     script:
       - cd ${TRAVIS_BUILD_DIR}

CMakeLists.txt

@@ -16,6 +16,8 @@ SET(TD_GRANT FALSE)
 SET(TD_MQTT FALSE)
 SET(TD_TSDB_PLUGINS FALSE)
 SET(TD_STORAGE FALSE)
+SET(TD_TOPIC FALSE)
+SET(TD_MODULE FALSE)
 
 SET(TD_COVER FALSE)
 SET(TD_MEM_CHECK FALSE)

Jenkinsfile

@@ -6,6 +6,7 @@ node {
 }
 
 def skipstage=0
+
 def abortPreviousBuilds() {
   def currentJobName = env.JOB_NAME
   def currentBuildNumber = env.BUILD_NUMBER.toInteger()
@@ -24,7 +25,7 @@ def abortPreviousBuilds() {
     build.doKill()    //doTerm(),doKill(),doTerm()
   }
 }
-//abort previous build
+//  abort previous build
 abortPreviousBuilds()
 def abort_previous(){
   def buildNumber = env.BUILD_NUMBER as int
@@ -32,24 +33,25 @@ def abort_previous(){
   milestone(buildNumber)
 }
 def pre_test(){
-    catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
-                sh '''
-                sudo rmtaos
-                '''
-    }
-    sh '''
     
+    
+    sh '''
+    sudo rmtaos || echo "taosd has not installed"
+    '''
+    sh '''
+    killall -9 taosd ||echo "no taosd running"
+    killall -9 gdb || echo "no gdb running"
     cd ${WKC}
     git checkout develop
     git reset --hard HEAD~10 >/dev/null 
-    git pull
+    git pull >/dev/null
     git fetch origin +refs/pull/${CHANGE_ID}/merge
     git checkout -qf FETCH_HEAD
-    git --no-pager diff --name-only FETCH_HEAD $(git merge-base FETCH_HEAD develop)|grep -v -E '.*md|//src//connector|Jenkinsfile' || exit 0
+    find ${WKC}/tests/pytest -name \'*\'.sql -exec rm -rf {} \\;
     cd ${WK}
     git reset --hard HEAD~10
-    git checkout develop
-    git pull
+    git checkout develop 
+    git pull >/dev/null 
     cd ${WK}
     export TZ=Asia/Harbin
     date
@@ -79,6 +81,10 @@ pipeline {
               changeRequest()
           }
           steps {
+            script{
+              abort_previous()
+              abortPreviousBuilds()
+            }
           sh'''
           cp -r ${WORKSPACE} ${WORKSPACE}.tes
           cd ${WORKSPACE}.tes
@@ -115,7 +121,6 @@ pipeline {
               sh '''
               date
               cd ${WKC}/tests
-              find pytest -name '*'sql|xargs rm -rf
               ./test-all.sh p1
               date'''
             }
@@ -131,7 +136,6 @@ pipeline {
                 sh '''
                 date
                 cd ${WKC}/tests
-                find pytest -name '*'sql|xargs rm -rf
                 ./test-all.sh p2
                 date'''
             }

README-CN.md

+[![Build Status](https://travis-ci.org/taosdata/TDengine.svg?branch=master)](https://travis-ci.org/taosdata/TDengine)
+[![Build status](https://ci.appveyor.com/api/projects/status/kf3pwh2or5afsgl9/branch/master?svg=true)](https://ci.appveyor.com/project/sangshuduo/tdengine-2n8ge/branch/master)
+[![Coverage Status](https://coveralls.io/repos/github/taosdata/TDengine/badge.svg?branch=develop)](https://coveralls.io/github/taosdata/TDengine?branch=develop)
+[![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/4201/badge)](https://bestpractices.coreinfrastructure.org/projects/4201)
+[![tdengine](https://snapcraft.io//tdengine/badge.svg)](https://snapcraft.io/tdengine)
+
+[![TDengine](TDenginelogo.png)](https://www.taosdata.com)
+
+简体中文 | [English](./README.md) 
+
+# TDengine 简介
+
+TDengine是涛思数据专为物联网、车联网、工业互联网、IT运维等设计和优化的大数据平台。除核心的快10倍以上的时序数据库功能外，还提供缓存、数据订阅、流式计算等功能，最大程度减少研发和运维的复杂度，且核心代码，包括集群功能全部开源（开源协议，AGPL v3.0）。
+
+- 10 倍以上性能提升。定义了创新的数据存储结构，单核每秒就能处理至少2万次请求，插入数百万个数据点，读出一千万以上数据点，比现有通用数据库快了十倍以上。
+- 硬件或云服务成本降至1/5。由于超强性能，计算资源不到通用大数据方案的1/5；通过列式存储和先进的压缩算法，存储空间不到通用数据库的1/10。
+- 全栈时序数据处理引擎。将数据库、消息队列、缓存、流式计算等功能融合一起，应用无需再集成Kafka/Redis/HBase/Spark等软件，大幅降低应用开发和维护成本。
+- 强大的分析功能。无论是十年前还是一秒钟前的数据，指定时间范围即可查询。数据可在时间轴上或多个设备上进行聚合。即席查询可通过Shell/Python/R/Matlab随时进行。
+- 与第三方工具无缝连接。不用一行代码，即可与Telegraf, Grafana, EMQ X, Prometheus, Matlab, R集成。后续还将支持MQTT, OPC, Hadoop，Spark等, BI工具也将无缝连接。
+- 零运维成本、零学习成本。安装、集群一秒搞定，无需分库分表，实时备份。标准SQL，支持JDBC,RESTful，支持Python/Java/C/C++/Go/Node.JS, 与MySQL相似，零学习成本。
+
+# 文档
+
+TDengine是一个高效的存储、查询、分析时序大数据的平台，专为物联网、车联网、工业互联网、运维监测等优化而设计。您可以像使用关系型数据库MySQL一样来使用它，但建议您在使用前仔细阅读一遍下面的文档，特别是 [数据模型](https://www.taosdata.com/cn/documentation/architecture) 与 [数据建模](https://www.taosdata.com/cn/documentation/model)。除本文档之外，欢迎 [下载产品白皮书](https://www.taosdata.com/downloads/TDengine%20White%20Paper.pdf)。
+
+# 生成
+
+TDengine目前2.0版服务器仅能在Linux系统上安装和运行，后续会支持Windows、macOS等系统。客户端可以在Windows或Linux上安装和运行。任何OS的应用也可以选择RESTful接口连接服务器taosd。CPU支持X64/ARM64/MIPS64/Alpha64，后续会支持ARM32、RISC-V等CPU架构。用户可根据需求选择通过[源码](https://www.taosdata.com/cn/getting-started/#通过源码安装)或者[安装包](https://www.taosdata.com/cn/getting-started/#通过安装包安装)来安装。本快速指南仅适用于通过源码安装。
+
+## 安装工具
+
+### Ubuntu 16.04 及以上版本 & Debian：
+
+```bash
+sudo apt-get install -y gcc cmake build-essential git
+```
+
+### Ubuntu 14.04：
+
+```bash
+sudo apt-get install -y gcc cmake3 build-essential git binutils-2.26
+export PATH=/usr/lib/binutils-2.26/bin:$PATH
+```
+
+编译或打包 JDBC 驱动源码，需安装 Java JDK 8 或以上版本和 Apache Maven 2.7 或以上版本。
+
+安装 OpenJDK 8：
+
+```bash
+sudo apt-get install -y openjdk-8-jdk
+```
+
+安装 Apache Maven：
+
+```bash
+sudo apt-get install -y  maven
+```
+
+### CentOS 7：
+
+```bash
+sudo yum install -y gcc gcc-c++ make cmake git
+```
+
+安装 OpenJDK 8：
+
+```bash
+sudo yum install -y java-1.8.0-openjdk
+```
+
+安装 Apache Maven：
+
+```bash
+sudo yum install -y maven
+```
+
+### CentOS 8 & Fedora:
+
+```bash
+sudo dnf install -y gcc gcc-c++ make cmake epel-release git
+```
+
+安装 OpenJDK 8：
+
+```bash
+sudo dnf install -y java-1.8.0-openjdk
+```
+
+安装 Apache Maven：
+
+```bash
+sudo dnf install -y maven
+```
+
+## 获取源码
+
+首先，你需要从 GitHub 克隆源码：
+
+```bash
+git clone https://github.com/taosdata/TDengine.git
+cd TDengine
+```
+
+Go 连接器和 Grafana 插件在其他独立仓库，如果安装它们的话，需要在 TDengine 目录下通过此命令安装：
+
+```bash
+git submodule update --init --recursive
+```
+
+## 生成 TDengine
+
+### Linux 系统
+
+```bash
+mkdir debug && cd debug
+cmake .. && cmake --build .
+```
+
+在X86-64、X86、arm64 和 arm32 平台上，TDengine 生成脚本可以自动检测机器架构。也可以手动配置 CPUTYPE 参数来指定 CPU 类型，如 aarch64 或 aarch32 等。
+
+aarch64：
+
+```bash
+cmake .. -DCPUTYPE=aarch64 && cmake --build .
+```
+
+aarch32：
+
+```bash
+cmake .. -DCPUTYPE=aarch32 && cmake --build .
+```
+
+### Windows 系统
+
+如果你使用的是 Visual Studio 2013 版本：
+
+打开 cmd.exe，执行 vcvarsall.bat 时，为 64 位操作系统指定“x86_amd64”，为 32 位操作系统指定“x86”。
+
+```bash
+mkdir debug && cd debug
+"C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\vcvarsall.bat" < x86_amd64 | x86 >
+cmake .. -G "NMake Makefiles"
+nmake
+```
+
+如果你使用的是 Visual Studio 2019 或 2017 版本：
+
+打开cmd.exe，执行 vcvarsall.bat 时，为 64 位操作系统指定“x64”，为 32 位操作系统指定“x86”。
+
+```bash
+mkdir debug && cd debug
+"c:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvarsall.bat" < x64 | x86 >
+cmake .. -G "NMake Makefiles"
+nmake
+```
+
+你也可以从开始菜单中找到"Visual Studio < 2019 | 2017 >"菜单项，根据你的系统选择"x64 Native Tools Command Prompt for VS < 2019 | 2017 >"或"x86 Native Tools Command Prompt for VS < 2019 | 2017 >"，打开命令行窗口，执行：
+
+```bash
+mkdir debug && cd debug
+cmake .. -G "NMake Makefiles"
+nmake
+```
+
+### Mac OS X 系统
+
+安装 Xcode 命令行工具和 cmake. 在 Catalina 和 Big Sur 操作系统上，需要安装 XCode 11.4+ 版本。
+
+```bash
+mkdir debug && cd debug
+cmake .. && cmake --build .
+```
+
+# 安装
+
+如果你不想安装，可以直接在shell中运行。生成完成后，安装 TDengine：
+```bash
+make install
+```
+
+用户可以在[文件目录结构](https://www.taosdata.com/cn/documentation/administrator#directories)中了解更多在操作系统中生成的目录或文件。
+
+安装成功后，在终端中启动 TDengine 服务：
+
+```bash
+taosd
+```
+
+用户可以使用 TDengine Shell 来连接 TDengine 服务，在终端中，输入：
+
+```bash
+taos
+```
+
+如果 TDengine Shell 连接服务成功，将会打印出欢迎消息和版本信息。如果失败，则会打印出错误消息。
+
+## 快速运行
+
+TDengine 生成后，在终端执行以下命令：
+
+```bash
+./build/bin/taosd -c test/cfg
+```
+
+在另一个终端，使用 TDengine shell 连接服务器：
+
+```bash
+./build/bin/taos -c test/cfg
+```
+
+"-c test/cfg"指定系统配置文件所在目录。
+
+# 体验 TDengine
+
+在TDengine终端中，用户可以通过SQL命令来创建/删除数据库、表等，并进行插入查询操作。
+
+```bash
+create database demo;
+use demo;
+create table t (ts timestamp, speed int);
+insert into t values ('2019-07-15 00:00:00', 10);
+insert into t values ('2019-07-15 01:00:00', 20);
+select * from t;
+          ts          |   speed   |
+===================================
+ 19-07-15 00:00:00.000|         10|
+ 19-07-15 01:00:00.000|         20|
+Query OK, 2 row(s) in set (0.001700s)
+```
+
+# 应用开发
+
+## 官方连接器
+
+TDengine 提供了丰富的应用程序开发接口，其中包括C/C++、Java、Python、Go、Node.js、C# 、RESTful 等，便于用户快速开发应用：
+
+- Java
+
+- C/C++
+
+- Python
+
+- Go
+
+- RESTful API
+
+- Node.js
+
+## 第三方连接器
+
+TDengine 社区生态中也有一些非常友好的第三方连接器，可以通过以下链接访问它们的源码。
+
+- [Rust Connector](https://github.com/taosdata/TDengine/tree/master/tests/examples/rust)
+- [.Net Core Connector](https://github.com/maikebing/Maikebing.EntityFrameworkCore.Taos)
+- [Lua Connector](https://github.com/taosdata/TDengine/tree/develop/tests/examples/lua)
+
+# 运行和添加测试例
+
+TDengine 的测试框架和所有测试例全部开源。
+
+点击 [这里](tests/How-To-Run-Test-And-How-To-Add-New-Test-Case.md)，了解如何运行测试例和添加新的测试例。
+
+# 成为社区贡献者
+
+点击 [这里](https://www.taosdata.com/cn/contributor/)，了解如何成为 TDengine 的贡献者。
+
+# 加入技术交流群
+
+TDengine 官方社群「物联网大数据群」对外开放，欢迎您加入讨论。搜索微信号 "tdengine"，加小T为好友，即可入群。
+
+# [谁在使用TDengine](https://github.com/taosdata/TDengine/issues/2432)
+
+欢迎所有 TDengine 用户及贡献者在 [这里](https://github.com/taosdata/TDengine/issues/2432) 分享您在当前工作中开发/使用 TDengine 的故事。 

README.md

@@ -6,6 +6,8 @@
 
 [![TDengine](TDenginelogo.png)](https://www.taosdata.com)
 
+English | [简体中文](./README-CN.md) 
+
 # What is TDengine？
 
 TDengine is an open-sourced big data platform under [GNU AGPL v3.0](http://www.gnu.org/licenses/agpl-3.0.html), designed and optimized for the Internet of Things (IoT), Connected Cars, Industrial IoT, and IT Infrastructure and Application Monitoring. Besides the 10x faster time-series database, it provides caching, stream computing, message queuing and other functionalities to reduce the complexity and cost of development and operation.
@@ -29,7 +31,7 @@ For user manual, system design and architecture, engineering blogs, refer to [TD
 # Building
 At the moment, TDengine only supports building and running on Linux systems. You can choose to [install from packages](https://www.taosdata.com/en/getting-started/#Install-from-Package) or from the source code. This quick guide is for installation from the source only.
 
-To build TDengine, use [CMake](https://cmake.org/) 3.5 or higher versions in the project directory. 
+To build TDengine, use [CMake](https://cmake.org/) 2.8.12.x or higher versions in the project directory. 
 
 ## Install tools
 
@@ -160,39 +162,42 @@ mkdir debug && cd debug
 cmake .. && cmake --build .
 ```
 
-# Quick Run
-
-# Quick Run
-To quickly start a TDengine server after building, run the command below in terminal:
-```bash
-./build/bin/taosd -c test/cfg
-```
-In another terminal, use the TDengine shell to connect the server:
-```bash
-./build/bin/taos -c test/cfg
-```
-option "-c test/cfg" specifies the system configuration file directory. 
-
 # Installing
+
 After building successfully, TDengine can be installed by:
 ```bash
-make install
+sudo make install
 ```
-Users can find more information about directories installed on the system in the [directory and files](https://www.taosdata.com/en/documentation/administrator/#Directory-and-Files) section. It should be noted that installing from source code does not configure service management for TDengine.
+
+Users can find more information about directories installed on the system in the [directory and files](https://www.taosdata.com/en/documentation/administrator/#Directory-and-Files) section. Since version 2.0, installing from source code will also configure service management for TDengine.
 Users can also choose to [install from packages](https://www.taosdata.com/en/getting-started/#Install-from-Package) for it.
 
 To start the service after installation, in a terminal, use:
-```cmd
-taosd
+```bash
+sudo systemctl start taosd
 ```
 
 Then users can use the [TDengine shell](https://www.taosdata.com/en/getting-started/#TDengine-Shell) to connect the TDengine server. In a terminal, use:
-```cmd
+```bash
 taos
 ```
 
 If TDengine shell connects the server successfully, welcome messages and version info are printed. Otherwise, an error message is shown.
 
+## Quick Run
+
+If you don't want to run TDengine as a service, you can run it in current shell. For example, to quickly start a TDengine server after building, run the command below in terminal:
+```bash
+./build/bin/taosd -c test/cfg
+```
+
+In another terminal, use the TDengine shell to connect the server:
+```bash
+./build/bin/taos -c test/cfg
+```
+
+option "-c test/cfg" specifies the system configuration file directory. 
+
 # Try TDengine
 It is easy to run SQL commands from TDengine shell which is the same as other SQL databases.
 ```sql
@@ -245,3 +250,6 @@ Please follow the [contribution guidelines](CONTRIBUTING.md) to contribute to th
 
 Add WeChat “tdengine” to join the group，you can communicate with other users.
 
+# [User List](https://github.com/taosdata/TDengine/issues/2432)
+
+If you are using TDengine and feel it helps or you'd like to do some contributions, please add your company to [user list](https://github.com/taosdata/TDengine/issues/2432) and let us know your needs.

cmake/define.inc

@@ -25,6 +25,14 @@ IF (TD_STORAGE)
   ADD_DEFINITIONS(-D_STORAGE)
 ENDIF ()
 
+IF (TD_TOPIC)
+  ADD_DEFINITIONS(-D_TOPIC)
+ENDIF ()
+
+IF (TD_MODULE)
+  ADD_DEFINITIONS(-D_MODULE)
+ENDIF ()
+
 IF (TD_GODLL)
   ADD_DEFINITIONS(-D_TD_GO_DLL_)
 ENDIF ()

cmake/input.inc

@@ -9,6 +9,22 @@ ELSEIF (${ACCOUNT} MATCHES "false")
   MESSAGE(STATUS "Build without account plugins")
 ENDIF ()
 
+IF (${TOPIC} MATCHES "true")
+  SET(TD_TOPIC TRUE)
+  MESSAGE(STATUS "Build with topic plugins")
+ELSEIF (${TOPIC} MATCHES "false")
+  SET(TD_TOPIC FALSE)
+  MESSAGE(STATUS "Build without topic plugins")
+ENDIF ()
+
+IF (${TD_MODULE} MATCHES "true")
+  SET(TD_MODULE TRUE)
+  MESSAGE(STATUS "Build with module plugins")
+ELSEIF (${TOPIC} MATCHES "false")
+  SET(TD_MODULE FALSE)
+  MESSAGE(STATUS "Build without module plugins")
+ENDIF ()
+
 IF (${COVER} MATCHES "true")
   SET(TD_COVER TRUE)
   MESSAGE(STATUS "Build with test coverage")

cmake/install.inc

@@ -32,7 +32,7 @@ ELSEIF (TD_WINDOWS)
   #INSTALL(TARGETS taos RUNTIME DESTINATION driver)
   #INSTALL(TARGETS shell RUNTIME DESTINATION .)
   IF (TD_MVN_INSTALLED)
-    INSTALL(FILES ${LIBRARY_OUTPUT_PATH}/taos-jdbcdriver-2.0.21-dist.jar DESTINATION connector/jdbc)
+    INSTALL(FILES ${LIBRARY_OUTPUT_PATH}/taos-jdbcdriver-2.0.22-dist.jar DESTINATION connector/jdbc)
   ENDIF ()
 ELSEIF (TD_DARWIN)
   SET(TD_MAKE_INSTALL_SH "${TD_COMMUNITY_DIR}/packaging/tools/make_install.sh")

cmake/version.inc

@@ -4,7 +4,7 @@ PROJECT(TDengine)
 IF (DEFINED VERNUMBER)
   SET(TD_VER_NUMBER ${VERNUMBER})
 ELSE ()
-  SET(TD_VER_NUMBER "2.0.17.0")
+  SET(TD_VER_NUMBER "2.0.18.0")
 ENDIF ()
 
 IF (DEFINED VERCOMPATIBLE)

documentation20/cn/00.index/docs.md

@@ -120,7 +120,7 @@ TDengine是一个高效的存储、查询、分析时序大数据的平台，专
 * [TDengine性能对比测试工具](https://www.taosdata.com/blog/2020/01/18/1166.html)
 * [IDEA数据库管理工具可视化使用TDengine](https://www.taosdata.com/blog/2020/08/27/1767.html)
 * [基于eletron开发的跨平台TDengine图形化管理工具](https://github.com/skye0207/TDengineGUI)
-* [DataX，支持TDengine的离线数据采集/同步工具](https://github.com/alibaba/DataX)
+* [DataX，支持TDengine的离线数据采集/同步工具](https://github.com/wgzhao/DataX)（文档：[读取插件](https://github.com/wgzhao/DataX/blob/master/docs/src/main/sphinx/reader/tdenginereader.md)、[写入插件](https://github.com/wgzhao/DataX/blob/master/docs/src/main/sphinx/writer/tdenginewriter.md)）
 
 ## TDengine与其他数据库的对比测试
 

documentation20/cn/03.architecture/docs.md

@@ -145,7 +145,7 @@ TDengine 建议用数据采集点的名字(如上表中的D1001)来做表名。
 
 在TDengine的设计里，**表用来代表一个具体的数据采集点，超级表用来代表一组相同类型的数据采集点集合**。当为某个具体数据采集点创建表时，用户使用超级表的定义做模板，同时指定该具体采集点（表）的标签值。与传统的关系型数据库相比，表（一个数据采集点）是带有静态标签的，而且这些标签可以事后增加、删除、修改。**一张超级表包含有多张表，这些表具有相同的时序数据schema，但带有不同的标签值**。
 
-当对多个具有相同数据类型的数据采集点进行聚合操作时，TDengine将先把满足标签过滤条件的表从超级表的中查找出来，然后再扫描这些表的时序数据，进行聚合操作，这样能将需要扫描的数据集大幅减少，从而大幅提高聚合计算的性能。
+当对多个具有相同数据类型的数据采集点进行聚合操作时，TDengine会先把满足标签过滤条件的表从超级表中找出来，然后再扫描这些表的时序数据，进行聚合操作，这样需要扫描的数据集会大幅减少，从而显著提高聚合计算的性能。
 
 ## <a class="anchor" id="cluster"></a>集群与基本逻辑单元
 

documentation20/cn/08.connector/01.java/docs.md

@@ -451,7 +451,8 @@ Query OK, 1 row(s) in set (0.000141s)
 
 | taos-jdbcdriver 版本 | TDengine 版本     | JDK 版本 |
 | -------------------- | ----------------- | -------- |
-| 2.0.12 及以上        | 2.0.8.0 及以上    | 1.8.x    |
+| 2.0.22              | 2.0.18.0 及以上     | 1.8.x    |
+| 2.0.12 - 2.0.21     | 2.0.8.0 - 2.0.17.0 | 1.8.x    |
 | 2.0.4 - 2.0.11       | 2.0.0.0 - 2.0.7.x | 1.8.x    |
 | 1.0.3                | 1.6.1.x 及以上    | 1.8.x    |
 | 1.0.2                | 1.6.1.x 及以上    | 1.8.x    |

documentation20/cn/10.cluster/docs.md

@@ -111,9 +111,10 @@ taos>
 
 **提示：**
 
-- 任何已经加入集群在线的数据节点，都可以作为后续待加入节点的firstEP。
-- firstEp这个参数仅仅在该数据节点首次加入集群时有作用，加入集群后，该数据节点会保存最新的mnode的End Point列表，不再依赖这个参数。
-- 两个没有配置firstEp参数的数据节点dnode启动后，会独立运行起来。这个时候，无法将其中一个数据节点加入到另外一个数据节点，形成集群。**无法将两个独立的集群合并成为新的集群**。
+- 任何已经加入集群在线的数据节点，都可以作为后续待加入节点的 firstEP。
+- firstEp 这个参数仅仅在该数据节点首次加入集群时有作用，加入集群后，该数据节点会保存最新的 mnode 的 End Point 列表，不再依赖这个参数。
+  - 接下来，配置文件中的 firstEp 参数就主要在客户端连接的时候使用了，例如 taos shell 如果不加参数，会默认连接由 firstEp 指定的节点。
+- 两个没有配置 firstEp 参数的数据节点 dnode 启动后，会独立运行起来。这个时候，无法将其中一个数据节点加入到另外一个数据节点，形成集群。**无法将两个独立的集群合并成为新的集群**。
 
 ## <a class="anchor" id="management"></a>数据节点管理
 

documentation20/cn/11.administrator/docs.md

@@ -6,17 +6,27 @@
 
 ### 内存需求
 
-每个 DB 可以创建固定数目的 vgroup，默认与 CPU 核数相同，可通过 maxVgroupsPerDb 配置；vgroup 中的每个副本会是一个 vnode；每个 vnode 会占用固定大小的内存（大小与数据库的配置参数 blocks 和 cache 有关)；每个 Table 会占用与标签总长度有关的内存；此外，系统会有一些固定的内存开销。因此，每个 DB 需要的系统内存可通过如下公式计算：
+每个 Database 可以创建固定数目的 vgroup，默认与 CPU 核数相同，可通过 maxVgroupsPerDb 配置；vgroup 中的每个副本会是一个 vnode；每个 vnode 会占用固定大小的内存（大小与数据库的配置参数 blocks 和 cache 有关)；每个 Table 会占用与标签总长度有关的内存；此外，系统会有一些固定的内存开销。因此，每个 DB 需要的系统内存可通过如下公式计算：
 
 ```
-Memory Size = maxVgroupsPerDb * (blocks * cache + 10MB) + numOfTables * (tagSizePerTable + 0.5KB)
+Database Memory Size = maxVgroupsPerDb * (blocks * cache + 10MB) + numOfTables * (tagSizePerTable + 0.5KB)
 ```
 
-示例：假设是 4 核机器，cache 是缺省大小 16M, blocks 是缺省值 6，假设有 10 万张表，标签总长度是 256 字节，则总的内存需求为：4 \* (16 \* 6 + 10) + 100000 \* (0.25 + 0.5) / 1000 = 499M。
+示例：假设是 4 核机器，cache 是缺省大小 16M, blocks 是缺省值 6，并且一个 DB 中有 10 万张表，标签总长度是 256 字节，则这个 DB 总的内存需求为：4 \* (16 \* 6 + 10) + 100000 \* (0.25 + 0.5) / 1000 = 499M。
 
-实际运行的系统往往会根据数据特点的不同，将数据存放在不同的 DB 里。因此做规划时，也需要考虑。
+在实际的系统运维中，我们通常会更关心 TDengine 服务进程（taosd）会占用的内存量。
+```
+taosd 内存总量 = vnode 内存 + mnode 内存 + 查询内存
+```
+
+其中：
+1. “vnode 内存”指的是集群中所有的 Database 存储分摊到当前 taosd 节点上所占用的内存资源。可以按上文“Database Memory Size”计算公式估算每个 DB 的内存占用量进行加总，再按集群中总共的 TDengine 节点数做平均（如果设置为多副本，则还需要乘以对应的副本倍数）。
+2. “mnode 内存”指的是集群中管理节点所占用的资源。如果一个 taosd 节点上分布有 mnode 管理节点，则内存消耗还需要增加“0.2KB * 集群中数据表总数”。
+3. “查询内存”指的是服务端处理查询请求时所需要占用的内存。单条查询语句至少会占用“0.2KB * 查询涉及的数据表总数”的内存量。
+
+注意：以上内存估算方法，主要讲解了系统的“必须内存需求”，而不是“内存总数上限”。在实际运行的生产环境中，由于操作系统缓存、资源管理调度等方面的原因，内存规划应当在估算结果的基础上保留一定冗余，以维持系统状态和系统性能的稳定性。并且，生产环境通常会配置系统资源的监控工具，以便及时发现硬件资源的紧缺情况。
 
-如果内存充裕，可以加大 Blocks 的配置，这样更多数据将保存在内存里，提高查询速度。
+最后，如果内存充裕，可以考虑加大 Blocks 的配置，这样更多数据将保存在内存里，提高查询速度。
 
 ### CPU 需求
 

documentation20/cn/12.taos-sql/docs.md

@@ -125,7 +125,7 @@ TDengine缺省的时间戳是毫秒精度，但通过修改配置参数enableMic
     ```mysql
     ALTER DATABASE db_name CACHELAST 0;
     ```
-    CACHELAST 参数控制是否在内存中缓存数据子表的 last_row。缺省值为 0，取值范围 [0, 1]。其中 0 表示不启用、1 表示启用。（从 2.0.11 版本开始支持）
+    CACHELAST 参数控制是否在内存中缓存数据子表的 last_row。缺省值为 0，取值范围 [0, 1]。其中 0 表示不启用、1 表示启用。（从 2.0.11 版本开始支持，修改后需要重启服务器生效。）
 
     **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。
 
@@ -249,7 +249,7 @@ TDengine缺省的时间戳是毫秒精度，但通过修改配置参数enableMic
 
     3) TAGS 列名不能为预留关键字；
 
-    4) TAGS 最多允许128个，至少1个，总长度不超过16k个字符。
+    4) TAGS 最多允许 128 个，至少 1 个，总长度不超过 16 KB。
 
 - **删除超级表**
 
@@ -331,7 +331,8 @@ TDengine缺省的时间戳是毫秒精度，但通过修改配置参数enableMic
     ```mysql
     INSERT INTO tb_name VALUES (field1_value1, ...) (field1_value2, ...) ...;
     ```
-    向表tb_name中插入多条记录
+    向表tb_name中插入多条记录  
+    **注意**：在使用“插入多条记录”方式写入数据时，不能把第一列的时间戳取值都设为now，否则会导致语句中的多条记录使用相同的时间戳，于是就可能出现相互覆盖以致这些数据行无法全部被正确保存。
 
 - **按指定的列插入多条记录**
     ```mysql

documentation20/cn/13.faq/docs.md

@@ -16,13 +16,13 @@
 
 ## 1. TDengine2.0之前的版本升级到2.0及以上的版本应该注意什么？☆☆☆
 
-2.0版本在之前版本的基础上，进行了完全的重构，配置文件和数据文件是不兼容的。在升级之前务必进行如下操作：
+2.0版在之前版本的基础上，进行了完全的重构，配置文件和数据文件是不兼容的。在升级之前务必进行如下操作：
 
-1. 删除配置文件，执行 <code> sudo rm -rf /etc/taos/taos.cfg </code>
-2. 删除日志文件，执行 <code> sudo rm -rf /var/log/taos/ </code>
-3. 确保数据已经不再需要的前提下，删除数据文件，执行 <code> sudo rm -rf /var/lib/taos/ </code>
-4. 安装最新稳定版本的TDengine
-5. 如果数据需要迁移数据或者数据文件损坏，请联系涛思数据官方技术支持团队，进行协助解决
+1. 删除配置文件，执行 `sudo rm -rf /etc/taos/taos.cfg`
+2. 删除日志文件，执行 `sudo rm -rf /var/log/taos/`
+3. 确保数据已经不再需要的前提下，删除数据文件，执行 `sudo rm -rf /var/lib/taos/`
+4. 安装最新稳定版本的 TDengine
+5. 如果需要迁移数据或者数据文件损坏，请联系涛思数据官方技术支持团队，进行协助解决
 
 ## 2. Windows平台下JDBCDriver找不到动态链接库，怎么办？
 

packaging/tools/remove.sh

@@ -213,10 +213,10 @@ fi
 
 if echo $osinfo | grep -qwi "ubuntu" ; then
 #  echo "this is ubuntu system"
-   ${csudo} rm -f /var/lib/dpkg/info/tdengine* || :
+   ${csudo} dpkg --force-all  -P tdengine || :
 elif echo $osinfo | grep -qwi "debian" ; then
 #  echo "this is debian system"
-   ${csudo} rm -f /var/lib/dpkg/info/tdengine* || :
+   ${csudo} dpkg --force-all  -P tdengine || :
 elif  echo $osinfo | grep -qwi "centos" ; then
 #  echo "this is centos system"
   ${csudo} rpm -e --noscripts tdengine || :

snap/snapcraft.yaml

 name: tdengine
 base: core18
-version: '2.0.17.0'
+version: '2.0.18.0'
 icon: snap/gui/t-dengine.svg
 summary: an open-source big data platform designed and optimized for IoT. 
 description: |
@@ -72,7 +72,7 @@ parts:
       - usr/bin/taosd
       - usr/bin/taos
       - usr/bin/taosdemo
-      - usr/lib/libtaos.so.2.0.17.0
+      - usr/lib/libtaos.so.2.0.18.0
       - usr/lib/libtaos.so.1
       - usr/lib/libtaos.so
 

src/CMakeLists.txt

@@ -19,6 +19,6 @@ ADD_SUBDIRECTORY(tsdb)
 ADD_SUBDIRECTORY(wal)
 ADD_SUBDIRECTORY(cq)
 ADD_SUBDIRECTORY(dnode)
-#ADD_SUBDIRECTORY(connector/odbc)
+ADD_SUBDIRECTORY(connector/odbc)
 ADD_SUBDIRECTORY(connector/jdbc)
 

src/balance/src/bnMain.c

@@ -425,7 +425,7 @@ static bool bnMonitorVgroups() {
 
   while (1) {
     pIter = mnodeGetNextVgroup(pIter, &pVgroup);
-    if (pVgroup == NULL) break;
+    if (pVgroup == NULL || pVgroup->pDb == NULL) break;
 
     int32_t dbReplica = pVgroup->pDb->cfg.replications;
     int32_t vgReplica = pVgroup->numOfVnodes;
@@ -721,4 +721,4 @@ int32_t bnAlterDnode(struct SDnodeObj *pSrcDnode, int32_t vnodeId, int32_t dnode
   mnodeDecDnodeRef(pDestDnode);
 
   return code;
-}
+}
\ No newline at end of file

src/client/inc/tscUtil.h

@@ -83,6 +83,22 @@ typedef struct SJoinSupporter {
   SArray*         pVgroupTables;
 } SJoinSupporter;
 
+
+typedef struct SMergeCtx {
+  SJoinSupporter* p;
+  int32_t         idx;
+  SArray*         res;
+  int8_t          compared;
+}SMergeCtx;
+
+typedef struct SMergeTsCtx {
+  SJoinSupporter* p;
+  STSBuf*         res;
+  int64_t         numOfInput;
+  int8_t          compared;
+}SMergeTsCtx;
+
+
 typedef struct SVgroupTableInfo {
   SVgroupInfo vgInfo;
   SArray*     itemList;   //SArray<STableIdInfo>
@@ -123,6 +139,7 @@ int32_t tscGetDataBlockFromList(SHashObj* pHashList, int64_t id, int32_t size, i
 bool tscIsPointInterpQuery(SQueryInfo* pQueryInfo);
 bool tscIsTWAQuery(SQueryInfo* pQueryInfo);
 bool tscIsSecondStageQuery(SQueryInfo* pQueryInfo);
+bool tscGroupbyColumn(SQueryInfo* pQueryInfo);
 
 bool tscNonOrderedProjectionQueryOnSTable(SQueryInfo *pQueryInfo, int32_t tableIndex);
 bool tscOrderedProjectionQueryOnSTable(SQueryInfo* pQueryInfo, int32_t tableIndex);
@@ -133,6 +150,7 @@ bool tscIsProjectionQuery(SQueryInfo* pQueryInfo);
 bool tscIsTwoStageSTableQuery(SQueryInfo* pQueryInfo, int32_t tableIndex);
 bool tscQueryTags(SQueryInfo* pQueryInfo);
 bool tscMultiRoundQuery(SQueryInfo* pQueryInfo, int32_t tableIndex);
+bool tscQueryBlockInfo(SQueryInfo* pQueryInfo);
 
 SSqlExpr* tscAddFuncInSelectClause(SQueryInfo* pQueryInfo, int32_t outputColIndex, int16_t functionId,
                                        SColumnIndex* pIndex, SSchema* pColSchema, int16_t colType);
@@ -152,7 +170,6 @@ SInternalField* tscFieldInfoInsert(SFieldInfo* pFieldInfo, int32_t index, TAOS_F
 SInternalField* tscFieldInfoGetInternalField(SFieldInfo* pFieldInfo, int32_t index);
 TAOS_FIELD* tscFieldInfoGetField(SFieldInfo* pFieldInfo, int32_t index);
 
-void tscFieldInfoUpdateOffset(SQueryInfo* pQueryInfo);
 void tscFieldInfoUpdateOffset(SQueryInfo* pQueryInfo);
 
 int16_t tscFieldInfoGetOffset(SQueryInfo* pQueryInfo, int32_t index);
@@ -182,6 +199,7 @@ int32_t   tscSqlExprCopy(SArray* dst, const SArray* src, uint64_t uid, bool deep
 void      tscSqlExprInfoDestroy(SArray* pExprInfo);
 
 SColumn* tscColumnClone(const SColumn* src);
+bool tscColumnExists(SArray* pColumnList, SColumnIndex* pColIndex);
 SColumn* tscColumnListInsert(SArray* pColList, SColumnIndex* colIndex);
 SArray* tscColumnListClone(const SArray* src, int16_t tableIndex);
 void tscColumnListDestroy(SArray* pColList);

src/client/inc/tsclient.h

@@ -153,15 +153,15 @@ typedef struct SCond {
 } SCond;
 
 typedef struct SJoinNode {
-  char     tableName[TSDB_TABLE_FNAME_LEN];
   uint64_t uid;
   int16_t  tagColId;
+  SArray*  tsJoin;
+  SArray*  tagJoin;
 } SJoinNode;
 
 typedef struct SJoinInfo {
-  bool      hasJoin;
-  SJoinNode left;
-  SJoinNode right;
+  bool      hasJoin;  
+  SJoinNode*  joinTables[TSDB_MAX_JOIN_TABLE_NUM];
 } SJoinInfo;
 
 typedef struct STagCond {
@@ -209,9 +209,10 @@ typedef struct STableDataBlocks {
 typedef struct SQueryInfo {
   int16_t          command;       // the command may be different for each subclause, so keep it seperately.
   uint32_t         type;          // query/insert type
+  STimeWindow      window;        // the whole query time window
 
-  STimeWindow      window;        // query time window
-  SInterval        interval;
+  SInterval        interval;      // tumble time window
+  SSessionWindow   sessionWindow; // session time window
 
   SSqlGroupbyExpr  groupbyExpr;   // group by tags info
   SArray *         colList;       // SArray<SColumn*>
@@ -244,6 +245,7 @@ typedef struct SQueryInfo {
 typedef struct {
   int     command;
   uint8_t msgType;
+  char    reserve1[3];        // fix bus error on arm32
   bool    autoCreated;        // create table if it is not existed during retrieve table meta in mnode
 
   union {
@@ -256,8 +258,10 @@ typedef struct {
 
   char *       curSql;       // current sql, resume position of sql after parsing paused
   int8_t       parseFinished;
+  char    reserve2[3];        // fix bus error on arm32
 
   int16_t      numOfCols;
+  char    reserve3[2];        // fix bus error on arm32
   uint32_t     allocSize;
   char *       payload;
   int32_t      payloadLen;
@@ -267,7 +271,9 @@ typedef struct {
   int32_t      numOfParams;
 
   int8_t       dataSourceType;     // load data from file or not
+  char    reserve4[3];        // fix bus error on arm32
   int8_t       submitSchema;   // submit block is built with table schema
+  char    reserve5[3];        // fix bus error on arm32
   STagData     tagData;        // NOTE: pTagData->data is used as a variant length array
 
   SName      **pTableNameList; // all involved tableMeta list of current insert sql statement.
@@ -290,7 +296,7 @@ typedef struct {
   char *         pRsp;
   int32_t        rspType;
   int32_t        rspLen;
-  uint64_t       qhandle;
+  uint64_t       qId;
   int64_t        useconds;
   int64_t        offset;  // offset value from vnode during projection query of stable
   int32_t        row;
@@ -373,7 +379,7 @@ typedef struct SSqlObj {
   int64_t          svgroupRid;
 
   int64_t          squeryLock;
-
+  int32_t          retryReason;  // previous error code
   struct SSqlObj  *prev, *next;
   int64_t          self;
 } SSqlObj;
@@ -409,7 +415,6 @@ typedef struct SSqlStream {
 
 void tscSetStreamDestTable(SSqlStream* pStream, const char* dstTable);
 
-
 int  tscAcquireRpc(const char *key, const char *user, const char *secret,void **pRpcObj);
 void tscReleaseRpc(void *param);
 void tscInitMsgsFp();

src/client/src/TSDBJNIConnector.c

@@ -481,15 +481,19 @@ JNIEXPORT jint JNICALL Java_com_taosdata_jdbc_TSDBJNIConnector_fetchRowImp(JNIEn
       case TSDB_DATA_TYPE_BOOL:
         (*env)->CallVoidMethod(env, rowobj, g_rowdataSetBooleanFp, i, (jboolean)(*((char *)row[i]) == 1));
         break;
+      case TSDB_DATA_TYPE_UTINYINT:
       case TSDB_DATA_TYPE_TINYINT:
         (*env)->CallVoidMethod(env, rowobj, g_rowdataSetByteFp, i, (jbyte) * ((int8_t *)row[i]));
         break;
+      case TSDB_DATA_TYPE_USMALLINT:
       case TSDB_DATA_TYPE_SMALLINT:
         (*env)->CallVoidMethod(env, rowobj, g_rowdataSetShortFp, i, (jshort) * ((int16_t *)row[i]));
         break;
+      case TSDB_DATA_TYPE_UINT:
       case TSDB_DATA_TYPE_INT:
         (*env)->CallVoidMethod(env, rowobj, g_rowdataSetIntFp, i, (jint) * (int32_t *)row[i]);
         break;
+      case TSDB_DATA_TYPE_UBIGINT:
       case TSDB_DATA_TYPE_BIGINT:
         (*env)->CallVoidMethod(env, rowobj, g_rowdataSetLongFp, i, (jlong) * ((int64_t *)row[i]));
         break;

src/client/src/tscAsync.c

@@ -160,8 +160,8 @@ static void tscProcessAsyncRetrieveImpl(void *param, TAOS_RES *tres, int numOfRo
   SSqlCmd *pCmd = &pSql->cmd;
   SSqlRes *pRes = &pSql->res;
 
-  if ((pRes->qhandle == 0 || numOfRows != 0) && pCmd->command < TSDB_SQL_LOCAL) {
-    if (pRes->qhandle == 0 && numOfRows != 0) {
+  if ((pRes->qId == 0 || numOfRows != 0) && pCmd->command < TSDB_SQL_LOCAL) {
+    if (pRes->qId == 0 && numOfRows != 0) {
       tscError("qhandle is NULL");
     } else {
       pRes->code = numOfRows;
@@ -208,7 +208,7 @@ void taos_fetch_rows_a(TAOS_RES *taosa, __async_cb_func_t fp, void *param) {
   pSql->fetchFp = fp;
   pSql->fp = tscAsyncFetchRowsProxy;
 
-  if (pRes->qhandle == 0) {
+  if (pRes->qId == 0) {
     tscError("qhandle is NULL");
     pRes->code = TSDB_CODE_TSC_INVALID_QHANDLE;
     pSql->param = param;
@@ -281,7 +281,7 @@ void tscQueueAsyncError(void(*fp), void *param, int32_t code) {
 }
 
 static void tscAsyncResultCallback(SSchedMsg *pMsg) {
-  SSqlObj* pSql = pMsg->ahandle;
+  SSqlObj* pSql = (SSqlObj*)taosAcquireRef(tscObjRef, (int64_t)pMsg->ahandle);
   if (pSql == NULL || pSql->signature != pSql) {
     tscDebug("%p SqlObj is freed, not add into queue async res", pSql);
     return;
@@ -292,25 +292,69 @@ static void tscAsyncResultCallback(SSchedMsg *pMsg) {
 
   SSqlRes *pRes = &pSql->res;
   if (pSql->fp == NULL || pSql->fetchFp == NULL){
+    taosReleaseRef(tscObjRef, pSql->self);
     return;
   }
 
   pSql->fp = pSql->fetchFp;
   (*pSql->fp)(pSql->param, pSql, pRes->code);
+  taosReleaseRef(tscObjRef, pSql->self);
 }
 
 void tscAsyncResultOnError(SSqlObj* pSql) { 
   SSchedMsg schedMsg = {0};
   schedMsg.fp = tscAsyncResultCallback;
-  schedMsg.ahandle = pSql;
+  schedMsg.ahandle = (void *)pSql->self;
   schedMsg.thandle = (void *)1;
   schedMsg.msg = 0;
   taosScheduleTask(tscQhandle, &schedMsg);
 }
 
-
 int tscSendMsgToServer(SSqlObj *pSql);
 
+static int32_t updateMetaBeforeRetryQuery(SSqlObj* pSql, STableMetaInfo* pTableMetaInfo, SQueryInfo* pQueryInfo) {
+  // handle the invalid table error code for super table.
+  // update the pExpr info, colList info, number of table columns
+  // TODO Re-parse this sql and issue the corresponding subquery as an alternative for this case.
+  if (pSql->retryReason == TSDB_CODE_TDB_INVALID_TABLE_ID) {
+    int32_t numOfExprs = (int32_t) tscSqlExprNumOfExprs(pQueryInfo);
+    int32_t numOfCols = tscGetNumOfColumns(pTableMetaInfo->pTableMeta);
+    int32_t numOfTags = tscGetNumOfTags(pTableMetaInfo->pTableMeta);
+
+    SSchema *pSchema = tscGetTableSchema(pTableMetaInfo->pTableMeta);
+    for (int32_t i = 0; i < numOfExprs; ++i) {
+      SSqlExpr *pExpr = tscSqlExprGet(pQueryInfo, i);
+      pExpr->uid = pTableMetaInfo->pTableMeta->id.uid;
+
+      if (pExpr->colInfo.colIndex >= 0) {
+        int32_t index = pExpr->colInfo.colIndex;
+
+        if ((TSDB_COL_IS_NORMAL_COL(pExpr->colInfo.flag) && index >= numOfCols) ||
+            (TSDB_COL_IS_TAG(pExpr->colInfo.flag) && (index < numOfCols || index >= (numOfCols + numOfTags)))) {
+          return pSql->retryReason;
+        }
+
+        if ((pSchema[pExpr->colInfo.colIndex].colId != pExpr->colInfo.colId) &&
+            strcasecmp(pExpr->colInfo.name, pSchema[pExpr->colInfo.colIndex].name) != 0) {
+          return pSql->retryReason;
+        }
+      }
+    }
+
+    // validate the table columns information
+    for (int32_t i = 0; i < taosArrayGetSize(pQueryInfo->colList); ++i) {
+      SColumn *pCol = taosArrayGetP(pQueryInfo->colList, i);
+      if (pCol->colIndex.columnIndex >= numOfCols) {
+        return pSql->retryReason;
+      }
+    }
+  } else {
+    // do nothing
+  }
+
+  return TSDB_CODE_SUCCESS;
+}
+
 void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
   SSqlObj* pSql = (SSqlObj*)taosAcquireRef(tscObjRef, (int64_t)param);
   if (pSql == NULL) return;
@@ -336,7 +380,8 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
     if (TSDB_QUERY_HAS_TYPE(pQueryInfo->type, (TSDB_QUERY_TYPE_STABLE_SUBQUERY|TSDB_QUERY_TYPE_SUBQUERY|TSDB_QUERY_TYPE_TAG_FILTER_QUERY))) {
       tscDebug("%p update local table meta, continue to process sql and send the corresponding query", pSql);
 
-      STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
+      STableMetaInfo *pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
+
       code = tscGetTableMeta(pSql, pTableMetaInfo);
       assert(code == TSDB_CODE_TSC_ACTION_IN_PROGRESS || code == TSDB_CODE_SUCCESS);
 
@@ -346,6 +391,10 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
       }
 
       assert((tscGetNumOfTags(pTableMetaInfo->pTableMeta) != 0));
+      code = updateMetaBeforeRetryQuery(pSql, pTableMetaInfo, pQueryInfo);
+      if (code != TSDB_CODE_SUCCESS) {
+        goto _error;
+      }
 
       // tscProcessSql can add error into async res
       tscProcessSql(pSql);

src/client/src/tscLocal.c

@@ -309,7 +309,7 @@ TAOS_ROW tscFetchRow(void *param) {
   SSqlCmd *pCmd = &pSql->cmd;
   SSqlRes *pRes = &pSql->res;
   
-  if (pRes->qhandle == 0 ||
+  if (pRes->qId == 0 ||
       pCmd->command == TSDB_SQL_RETRIEVE_EMPTY_RESULT ||
       pCmd->command == TSDB_SQL_INSERT) {
     return NULL;
@@ -905,7 +905,7 @@ int tscProcessLocalCmd(SSqlObj *pSql) {
      * set the qhandle to be 1 in order to pass the qhandle check, and to call partial release function to
      * free allocated resources and remove the SqlObj from sql query linked list
      */
-    pRes->qhandle = 0x1;
+    pRes->qId = 0x1;
     pRes->numOfRows = 0;
   } else if (pCmd->command == TSDB_SQL_SHOW_CREATE_TABLE) {
     pRes->code = tscProcessShowCreateTable(pSql); 

src/client/src/tscLocalMerge.c

@@ -101,6 +101,10 @@ static void tscInitSqlContext(SSqlCmd *pCmd, SLocalMerger *pReducer, tOrderDescr
     } else if (functionId == TSDB_FUNC_APERCT) {
       pCtx->param[0].i64 = pExpr->param[0].i64;
       pCtx->param[0].nType  = pExpr->param[0].nType;
+    } else if (functionId == TSDB_FUNC_BLKINFO) {
+      pCtx->param[0].i64 = pExpr->param[0].i64;
+      pCtx->param[0].nType = pExpr->param[0].nType;
+      pCtx->numOfParams = 1;
     }
 
     pCtx->interBufBytes = pExpr->interBytes;
@@ -952,10 +956,10 @@ static void doFillResult(SSqlObj *pSql, SLocalMerger *pLocalMerge, bool doneOutp
   // todo extract function
   int64_t actualETime = (pQueryInfo->order.order == TSDB_ORDER_ASC)? pQueryInfo->window.ekey: pQueryInfo->window.skey;
 
-  tFilePage **pResPages = malloc(POINTER_BYTES * pQueryInfo->fieldsInfo.numOfOutput);
+  void** pResPages = malloc(POINTER_BYTES * pQueryInfo->fieldsInfo.numOfOutput);
   for (int32_t i = 0; i < pQueryInfo->fieldsInfo.numOfOutput; ++i) {
     TAOS_FIELD *pField = tscFieldInfoGetField(&pQueryInfo->fieldsInfo, i);
-    pResPages[i] = calloc(1, sizeof(tFilePage) + pField->bytes * pLocalMerge->resColModel->capacity);
+    pResPages[i] = calloc(1, pField->bytes * pLocalMerge->resColModel->capacity);
   }
 
   while (1) {
@@ -967,7 +971,7 @@ static void doFillResult(SSqlObj *pSql, SLocalMerger *pLocalMerge, bool doneOutp
       if (pQueryInfo->limit.offset > 0) {
         for (int32_t i = 0; i < pQueryInfo->fieldsInfo.numOfOutput; ++i) {
           TAOS_FIELD *pField = tscFieldInfoGetField(&pQueryInfo->fieldsInfo, i);
-          memmove(pResPages[i]->data, pResPages[i]->data + pField->bytes * pQueryInfo->limit.offset,
+          memmove(pResPages[i], ((char*)pResPages[i]) + pField->bytes * pQueryInfo->limit.offset,
                   (size_t)(newRows * pField->bytes));
         }
       }
@@ -1011,7 +1015,7 @@ static void doFillResult(SSqlObj *pSql, SLocalMerger *pLocalMerge, bool doneOutp
     int32_t offset = 0;
     for (int32_t i = 0; i < pQueryInfo->fieldsInfo.numOfOutput; ++i) {
       TAOS_FIELD *pField = tscFieldInfoGetField(&pQueryInfo->fieldsInfo, i);
-      memcpy(pRes->data + offset * pRes->numOfRows, pResPages[i]->data, (size_t)(pField->bytes * pRes->numOfRows));
+      memcpy(pRes->data + offset * pRes->numOfRows, pResPages[i], (size_t)(pField->bytes * pRes->numOfRows));
       offset += pField->bytes;
     }
 
@@ -1690,7 +1694,7 @@ void tscInitResObjForLocalQuery(SSqlObj *pObj, int32_t numOfRes, int32_t rowLen)
     tscDestroyLocalMerger(pObj);
   }
 
-  pRes->qhandle = 1;  // hack to pass the safety check in fetch_row function
+  pRes->qId = 1;  // hack to pass the safety check in fetch_row function
   pRes->numOfRows = 0;
   pRes->row = 0;
 

src/client/src/tscParseInsert.c

@@ -307,7 +307,8 @@ int32_t tsParseOneColumnData(SSchema *pSchema, SStrToken *pToken, char *payload,
           return tscInvalidSQLErrMsg(msg, "illegal float data", pToken->z);
         }
 
-        *((float *)payload) = (float)dv;
+//        *((float *)payload) = (float)dv;
+        SET_FLOAT_VAL(payload, dv);
       }
       break;
 
@@ -393,7 +394,7 @@ static int32_t tsCheckTimestamp(STableDataBlocks *pDataBlocks, const char *start
 
   TSKEY k = *(TSKEY *)start;
 
-  if (k == 0) {
+  if (k == INT64_MIN) {
     if (pDataBlocks->tsSource == TSDB_USE_CLI_TS) {
       return -1;
     } else if (pDataBlocks->tsSource == -1) {
@@ -1359,7 +1360,7 @@ int tsParseSql(SSqlObj *pSql, bool initial) {
       }
     }
   } else {
-    SSqlInfo SQLInfo = qSQLParse(pSql->sqlstr);
+    SSqlInfo SQLInfo = qSqlParse(pSql->sqlstr);
     ret = tscToSQLCmd(pSql, &SQLInfo);
     if (ret == TSDB_CODE_TSC_INVALID_SQL && pSql->parseRetry == 0 && SQLInfo.type == TSDB_SQL_NULL) {
       tscResetSqlCmd(pCmd, true);

src/client/src/tscPrepare.c

@@ -261,7 +261,7 @@ static int doBindParam(char* data, SParamInfo* param, TAOS_BIND* bind) {
     return TSDB_CODE_SUCCESS;
   }
 
-  if (1) {
+  if (0) {
     // allow user bind param data with different type
     union {
       int8_t          v1;
@@ -903,7 +903,7 @@ int taos_stmt_prepare(TAOS_STMT* stmt, const char* sql, unsigned long length) {
     return TSDB_CODE_TSC_OUT_OF_MEMORY;
   }
 
-  pRes->qhandle = 0;
+  pRes->qId = 0;
   pRes->numOfRows = 1;
 
   strtolower(pSql->sqlstr, sql);
@@ -1057,14 +1057,28 @@ int taos_stmt_get_param(TAOS_STMT *stmt, int idx, int *type, int *bytes) {
   }
 
   if (pStmt->isInsert) {
-    SSqlObj* pSql = pStmt->pSql;
-    SSqlCmd *pCmd    = &pSql->cmd;
-    STableDataBlocks* pBlock = taosArrayGetP(pCmd->pDataBlocks, 0);
+    SSqlCmd* pCmd = &pStmt->pSql->cmd;
+    STableMetaInfo* pTableMetaInfo = tscGetTableMetaInfoFromCmd(pCmd, 0, 0);
+    STableMeta* pTableMeta = pTableMetaInfo->pTableMeta;
+    if (pCmd->pTableBlockHashList == NULL) {
+      pCmd->pTableBlockHashList = taosHashInit(16, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BIGINT), true, false);
+    }
+
+    STableDataBlocks* pBlock = NULL;
 
-    assert(pCmd->numOfParams == pBlock->numOfParams);
-    if (idx < 0 || idx >= pBlock->numOfParams) return -1;
+    int32_t ret =
+      tscGetDataBlockFromList(pCmd->pTableBlockHashList, pTableMeta->id.uid, TSDB_PAYLOAD_SIZE, sizeof(SSubmitBlk),
+          pTableMeta->tableInfo.rowSize, &pTableMetaInfo->name, pTableMeta, &pBlock, NULL);
+    if (ret != 0) {
+      // todo handle error
+    }
+
+    if (idx<0 || idx>=pBlock->numOfParams) {
+      tscError("param %d: out of range", idx);
+      abort();
+    }
 
-    SParamInfo* param = pBlock->params + idx;
+    SParamInfo* param = &pBlock->params[idx];
     if (type) *type = param->type;
     if (bytes) *bytes = param->bytes;
 

src/client/src/tscProfile.c

@@ -249,8 +249,8 @@ int tscBuildQueryStreamDesc(void *pMsg, STscObj *pObj) {
     pQdesc->stime = htobe64(pSql->stime);
     pQdesc->queryId = htonl(pSql->queryId);
     //pQdesc->useconds = htobe64(pSql->res.useconds);
-    pQdesc->useconds = htobe64(now - pSql->stime);
-    pQdesc->qHandle = htobe64(pSql->res.qhandle);
+    pQdesc->useconds = htobe64(now - pSql->stime);  // use local time instead of sever rsp elapsed time
+    pQdesc->qHandle = htobe64(pSql->res.qId);
 
     pHeartbeat->numOfQueries++;
     pQdesc++;

src/client/src/tscServer.c

@@ -350,8 +350,8 @@ void tscProcessMsgFromServer(SRpcMsg *rpcMsg, SRpcEpSet *pEpSet) {
         taosMsleep(duration);
       }
 
+      pSql->retryReason = rpcMsg->code;
       rpcMsg->code = tscRenewTableMeta(pSql, 0);
-
       // if there is an error occurring, proceed to the following error handling procedure.
       if (rpcMsg->code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
         taosReleaseRef(tscObjRef, handle);
@@ -497,8 +497,6 @@ int tscProcessSql(SSqlObj *pSql) {
       return pSql->res.code;
     }
   } else if (pCmd->command >= TSDB_SQL_LOCAL) {
-    //pSql->epSet = tscMgmtEpSet;
-//  } else {  // local handler
     return (*tscProcessMsgRsp[pCmd->command])(pSql);
   }
   
@@ -510,7 +508,7 @@ int tscBuildFetchMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
 
   SQueryInfo *pQueryInfo = tscGetQueryInfoDetail(&pSql->cmd, pSql->cmd.clauseIndex);
   pRetrieveMsg->free    = htons(pQueryInfo->type);
-  pRetrieveMsg->qhandle = htobe64(pSql->res.qhandle);
+  pRetrieveMsg->qId     = htobe64(pSql->res.qId);
 
   // todo valid the vgroupId at the client side
   STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
@@ -522,7 +520,7 @@ int tscBuildFetchMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
       assert(pVgroupInfo->vgroups[vgIndex].vgId > 0 && vgIndex < pTableMetaInfo->vgroupList->numOfVgroups);
 
       pRetrieveMsg->header.vgId = htonl(pVgroupInfo->vgroups[vgIndex].vgId);
-      tscDebug("%p build fetch msg from vgId:%d, vgIndex:%d", pSql, pVgroupInfo->vgroups[vgIndex].vgId, vgIndex);
+      tscDebug("%p build fetch msg from vgId:%d, vgIndex:%d, qhandle:%" PRIX64, pSql, pVgroupInfo->vgroups[vgIndex].vgId, vgIndex, pSql->res.qId);
     } else {
       int32_t numOfVgroups = (int32_t)taosArrayGetSize(pTableMetaInfo->pVgroupTables);
       assert(vgIndex >= 0 && vgIndex < numOfVgroups);
@@ -530,12 +528,12 @@ int tscBuildFetchMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
       SVgroupTableInfo* pTableIdList = taosArrayGet(pTableMetaInfo->pVgroupTables, vgIndex);
 
       pRetrieveMsg->header.vgId = htonl(pTableIdList->vgInfo.vgId);
-      tscDebug("%p build fetch msg from vgId:%d, vgIndex:%d", pSql, pTableIdList->vgInfo.vgId, vgIndex);
+      tscDebug("%p build fetch msg from vgId:%d, vgIndex:%d, qId:%" PRIu64, pSql, pTableIdList->vgInfo.vgId, vgIndex, pSql->res.qId);
     }
   } else {
     STableMeta* pTableMeta = pTableMetaInfo->pTableMeta;
     pRetrieveMsg->header.vgId = htonl(pTableMeta->vgId);
-    tscDebug("%p build fetch msg from only one vgroup, vgId:%d", pSql, pTableMeta->vgId);
+    tscDebug("%p build fetch msg from only one vgroup, vgId:%d, qId:%" PRIu64, pSql, pTableMeta->vgId, pSql->res.qId);
   }
 
   pSql->cmd.payloadLen = sizeof(SRetrieveTableMsg);
@@ -615,7 +613,7 @@ static int32_t tscEstimateQueryMsgSize(SSqlObj *pSql, int32_t clauseIndex) {
          tableSerialize + sqlLen + 4096 + pQueryInfo->bufLen;
 }
 
-static char *doSerializeTableInfo(SQueryTableMsg* pQueryMsg, SSqlObj *pSql, char *pMsg) {
+static char *doSerializeTableInfo(SQueryTableMsg* pQueryMsg, SSqlObj *pSql, char *pMsg, int32_t *succeed) {
   STableMetaInfo *pTableMetaInfo = tscGetTableMetaInfoFromCmd(&pSql->cmd, pSql->cmd.clauseIndex, 0);
   TSKEY dfltKey = htobe64(pQueryMsg->window.skey);
 
@@ -628,9 +626,14 @@ static char *doSerializeTableInfo(SQueryTableMsg* pQueryMsg, SSqlObj *pSql, char
       assert(index >= 0);
 
       SVgroupInfo* pVgroupInfo = NULL;
-      if (pTableMetaInfo->vgroupList->numOfVgroups > 0) {
+      if (pTableMetaInfo->vgroupList && pTableMetaInfo->vgroupList->numOfVgroups > 0) {
         assert(index < pTableMetaInfo->vgroupList->numOfVgroups);
         pVgroupInfo = &pTableMetaInfo->vgroupList->vgroups[index];
+      } else {
+        tscError("%p No vgroup info found", pSql);
+        
+        *succeed = 0;
+        return pMsg;
       }
 
       vgId = pVgroupInfo->vgId;
@@ -645,7 +648,6 @@ static char *doSerializeTableInfo(SQueryTableMsg* pQueryMsg, SSqlObj *pSql, char
     }
 
     pSql->epSet.inUse = rand()%pSql->epSet.numOfEps;
-
     pQueryMsg->head.vgId = htonl(vgId);
 
     STableIdInfo *pTableIdInfo = (STableIdInfo *)pMsg;
@@ -660,8 +662,6 @@ static char *doSerializeTableInfo(SQueryTableMsg* pQueryMsg, SSqlObj *pSql, char
     int32_t numOfVgroups = (int32_t)taosArrayGetSize(pTableMetaInfo->pVgroupTables);
     assert(index >= 0 && index < numOfVgroups);
 
-    tscDebug("%p query on stable, vgIndex:%d, numOfVgroups:%d", pSql, index, numOfVgroups);
-
     SVgroupTableInfo* pTableIdList = taosArrayGet(pTableMetaInfo->pVgroupTables, index);
 
     // set the vgroup info 
@@ -670,7 +670,10 @@ static char *doSerializeTableInfo(SQueryTableMsg* pQueryMsg, SSqlObj *pSql, char
     
     int32_t numOfTables = (int32_t)taosArrayGetSize(pTableIdList->itemList);
     pQueryMsg->numOfTables = htonl(numOfTables);  // set the number of tables
-  
+
+    tscDebug("%p query on stable, vgId:%d, numOfTables:%d, vgIndex:%d, numOfVgroups:%d", pSql,
+             pTableIdList->vgInfo.vgId, numOfTables, index, numOfVgroups);
+
     // serialize each table id info
     for(int32_t i = 0; i < numOfTables; ++i) {
       STableIdInfo* pItem = taosArrayGet(pTableIdList->itemList, i);
@@ -705,7 +708,7 @@ int tscBuildQueryMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
   STableMeta * pTableMeta = pTableMetaInfo->pTableMeta;
 
   size_t numOfSrcCols = taosArrayGetSize(pQueryInfo->colList);
-  if (numOfSrcCols <= 0 && !tscQueryTags(pQueryInfo)) {
+  if (numOfSrcCols <= 0 && !tscQueryTags(pQueryInfo) && !tscQueryBlockInfo(pQueryInfo)) {
     tscError("%p illegal value of numOfCols in query msg: %" PRIu64 ", table cols:%d", pSql, (uint64_t)numOfSrcCols,
         tscGetNumOfColumns(pTableMeta));
 
@@ -756,6 +759,8 @@ int tscBuildQueryMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
   pQueryMsg->vgroupLimit    = htobe64(pQueryInfo->vgroupLimit);
   pQueryMsg->sqlstrLen      = htonl(sqlLen);
   pQueryMsg->prevResultLen  = htonl(pQueryInfo->bufLen);
+  pQueryMsg->sw.gap         = htobe64(pQueryInfo->sessionWindow.gap);
+  pQueryMsg->sw.primaryColId = htonl(PRIMARYKEY_TIMESTAMP_COL_INDEX);
 
   size_t numOfOutput = tscSqlExprNumOfExprs(pQueryInfo);
   pQueryMsg->numOfOutput = htons((int16_t)numOfOutput);  // this is the stage one output column number
@@ -835,6 +840,25 @@ int tscBuildQueryMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
     pSqlFuncExpr->colInfo.colIndex = htons(pExpr->colInfo.colIndex);
     pSqlFuncExpr->colInfo.flag     = htons(pExpr->colInfo.flag);
 
+    if (TSDB_COL_IS_UD_COL(pExpr->colInfo.flag)) {
+      pSqlFuncExpr->colType  = htons(pExpr->resType);
+      pSqlFuncExpr->colBytes = htons(pExpr->resBytes);
+    } else if (pExpr->colInfo.colId == TSDB_TBNAME_COLUMN_INDEX) {
+      SSchema *s = tGetTbnameColumnSchema();
+
+      pSqlFuncExpr->colType = htons(s->type);
+      pSqlFuncExpr->colBytes = htons(s->bytes);
+    } else if (pExpr->colInfo.colId == TSDB_BLOCK_DIST_COLUMN_INDEX) {
+      SSchema s = tGetBlockDistColumnSchema();
+
+      pSqlFuncExpr->colType = htons(s.type);
+      pSqlFuncExpr->colBytes = htons(s.bytes);
+    } else {
+      SSchema* s = tscGetColumnSchemaById(pTableMeta, pExpr->colInfo.colId);
+      pSqlFuncExpr->colType  = htons(s->type);
+      pSqlFuncExpr->colBytes = htons(s->bytes);
+    }
+
     pSqlFuncExpr->functionId  = htons(pExpr->functionId);
     pSqlFuncExpr->numOfParams = htons(pExpr->numOfParams);
     pSqlFuncExpr->resColId    = htons(pExpr->resColId);
@@ -876,8 +900,7 @@ int tscBuildQueryMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
     }
 
 
-    for (int32_t j = 0; j < pExpr->numOfParams; ++j) {
-      // todo add log
+    for (int32_t j = 0; j < pExpr->numOfParams; ++j) { // todo add log
       pSqlFuncExpr->arg[j].argType = htons((uint16_t)pExpr->param[j].nType);
       pSqlFuncExpr->arg[j].argBytes = htons(pExpr->param[j].nLen);
 
@@ -902,6 +925,8 @@ int tscBuildQueryMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
     for (int32_t i = 0; i < output; ++i) {
       SInternalField* pField = tscFieldInfoGetInternalField(&pQueryInfo->fieldsInfo, i);
       SSqlExpr *pExpr = pField->pSqlExpr;
+
+      // this should be switched to projection query
       if (pExpr != NULL) {
         // the queried table has been removed and a new table with the same name has already been created already
         // return error msg
@@ -915,33 +940,31 @@ int tscBuildQueryMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
           return TSDB_CODE_TSC_INVALID_SQL;
         }
 
-        pSqlFuncExpr1->colInfo.colId    = htons(pExpr->colInfo.colId);
-        pSqlFuncExpr1->colInfo.colIndex = htons(pExpr->colInfo.colIndex);
-        pSqlFuncExpr1->colInfo.flag     = htons(pExpr->colInfo.flag);
-
-        pSqlFuncExpr1->functionId  = htons(pExpr->functionId);
-        pSqlFuncExpr1->numOfParams = htons(pExpr->numOfParams);
-        pMsg += sizeof(SSqlFuncMsg);
-
-        for (int32_t j = 0; j < pExpr->numOfParams; ++j) {
-          // todo add log
-          pSqlFuncExpr1->arg[j].argType = htons((uint16_t)pExpr->param[j].nType);
-          pSqlFuncExpr1->arg[j].argBytes = htons(pExpr->param[j].nLen);
-
-          if (pExpr->param[j].nType == TSDB_DATA_TYPE_BINARY) {
-            memcpy(pMsg, pExpr->param[j].pz, pExpr->param[j].nLen);
-            pMsg += pExpr->param[j].nLen;
-          } else {
-            pSqlFuncExpr1->arg[j].argValue.i64 = htobe64(pExpr->param[j].i64);
+        pSqlFuncExpr1->numOfParams = 0;  // no params for projection query
+        pSqlFuncExpr1->functionId  = htons(TSDB_FUNC_PRJ);
+        pSqlFuncExpr1->colInfo.colId = htons(pExpr->resColId);
+        pSqlFuncExpr1->colInfo.flag = htons(TSDB_COL_NORMAL);
+
+        bool assign = false;
+        for (int32_t f = 0; f < tscSqlExprNumOfExprs(pQueryInfo); ++f) {
+          SSqlExpr *pe = tscSqlExprGet(pQueryInfo, f);
+          if (pe == pExpr) {
+            pSqlFuncExpr1->colInfo.colIndex = htons(f);
+            pSqlFuncExpr1->colType = htons(pe->resType);
+            pSqlFuncExpr1->colBytes = htons(pe->resBytes);
+            assign = true;
+            break;
           }
         }
 
+        assert(assign);
+        pMsg += sizeof(SSqlFuncMsg);
         pSqlFuncExpr1 = (SSqlFuncMsg *)pMsg;
       } else {
         assert(pField->pArithExprInfo != NULL);
         SExprInfo* pExprInfo = pField->pArithExprInfo;
 
-        pSqlFuncExpr1->colInfo.colId    = htons(pExprInfo->base.colInfo.colId);
+        pSqlFuncExpr1->colInfo.colId = htons(pExprInfo->base.colInfo.colId);
         pSqlFuncExpr1->functionId  = htons(pExprInfo->base.functionId);
         pSqlFuncExpr1->numOfParams = htons(pExprInfo->base.numOfParams);
         pMsg += sizeof(SSqlFuncMsg);
@@ -966,8 +989,13 @@ int tscBuildQueryMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
     pQueryMsg->secondStageOutput = 0;
   }
 
+  int32_t succeed = 1;
+  
   // serialize the table info (sid, uid, tags)
-  pMsg = doSerializeTableInfo(pQueryMsg, pSql, pMsg);
+  pMsg = doSerializeTableInfo(pQueryMsg, pSql, pMsg, &succeed);
+  if (succeed == 0) {
+    return TSDB_CODE_TSC_APP_ERROR;
+  }
   
   SSqlGroupbyExpr *pGroupbyExpr = &pQueryInfo->groupbyExpr;
   if (pGroupbyExpr->numOfGroupCols > 0) {
@@ -1091,7 +1119,8 @@ int tscBuildQueryMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
 int32_t tscBuildCreateDbMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
   SSqlCmd *pCmd = &pSql->cmd;
   pCmd->payloadLen = sizeof(SCreateDbMsg);
-  pCmd->msgType = TSDB_MSG_TYPE_CM_CREATE_DB;
+  
+  pCmd->msgType = (pInfo->pMiscInfo->dbOpt.dbType == TSDB_DB_TYPE_DEFAULT) ? TSDB_MSG_TYPE_CM_CREATE_DB : TSDB_MSG_TYPE_CM_CREATE_TP;
 
   SCreateDbMsg *pCreateDbMsg = (SCreateDbMsg *)pCmd->payload;
 
@@ -1223,7 +1252,7 @@ int32_t tscBuildDropDbMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
 
   pDropDbMsg->ignoreNotExists = pInfo->pMiscInfo->existsCheck ? 1 : 0;
 
-  pCmd->msgType = TSDB_MSG_TYPE_CM_DROP_DB;
+  pCmd->msgType = (pInfo->pMiscInfo->dbType == TSDB_DB_TYPE_DEFAULT) ? TSDB_MSG_TYPE_CM_DROP_DB : TSDB_MSG_TYPE_CM_DROP_TP;
   return TSDB_CODE_SUCCESS;
 }
 
@@ -1301,6 +1330,23 @@ int32_t tscBuildUseDbMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
   return TSDB_CODE_SUCCESS;
 }
 
+int32_t tscBuildSyncDbReplicaMsg(SSqlObj* pSql, SSqlInfo *pInfo) {
+  SSqlCmd *pCmd = &pSql->cmd;
+  pCmd->payloadLen = sizeof(SSyncDbMsg);
+
+  if (TSDB_CODE_SUCCESS != tscAllocPayload(pCmd, pCmd->payloadLen)) {
+    tscError("%p failed to malloc for query msg", pSql);
+    return TSDB_CODE_TSC_OUT_OF_MEMORY;
+  }
+
+  SSyncDbMsg *pSyncMsg = (SSyncDbMsg *)pCmd->payload;
+  STableMetaInfo *pTableMetaInfo = tscGetTableMetaInfoFromCmd(pCmd, pCmd->clauseIndex, 0);
+  tNameExtractFullName(&pTableMetaInfo->name, pSyncMsg->db);
+  pCmd->msgType = TSDB_MSG_TYPE_CM_SYNC_DB;
+
+  return TSDB_CODE_SUCCESS;
+}
+
 int32_t tscBuildShowMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
   STscObj *pObj = pSql->pTscObj;
   SSqlCmd *pCmd = &pSql->cmd;
@@ -1367,7 +1413,7 @@ int tscEstimateCreateTableMsgLength(SSqlObj *pSql, SSqlInfo *pInfo) {
   SSqlCmd *pCmd = &(pSql->cmd);
   int32_t size = minMsgSize() + sizeof(SCMCreateTableMsg) + sizeof(SCreateTableMsg);
 
-  SCreateTableSQL *pCreateTableInfo = pInfo->pCreateTableInfo;
+  SCreateTableSql *pCreateTableInfo = pInfo->pCreateTableInfo;
   if (pCreateTableInfo->type == TSQL_CREATE_TABLE_FROM_STABLE) {
     int32_t numOfTables = (int32_t)taosArrayGetSize(pInfo->pCreateTableInfo->childTableInfo);
     size += numOfTables * (sizeof(SCreateTableMsg) + TSDB_MAX_TAGS_LEN);
@@ -1376,7 +1422,7 @@ int tscEstimateCreateTableMsgLength(SSqlObj *pSql, SSqlInfo *pInfo) {
   }
 
   if (pCreateTableInfo->pSelect != NULL) {
-    size += (pCreateTableInfo->pSelect->selectToken.n + 1);
+    size += (pCreateTableInfo->pSelect->sqlstr.n + 1);
   }
 
   return size + TSDB_EXTRA_PAYLOAD_SIZE;
@@ -1434,7 +1480,7 @@ int tscBuildCreateTableMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
     int32_t code = tNameExtractFullName(&pTableMetaInfo->name, pCreateMsg->tableName);
     assert(code == 0);
 
-    SCreateTableSQL *pCreateTable = pInfo->pCreateTableInfo;
+    SCreateTableSql *pCreateTable = pInfo->pCreateTableInfo;
 
     pCreateMsg->igExists = pCreateTable->existCheck ? 1 : 0;
     pCreateMsg->numOfColumns = htons(pCmd->numOfCols);
@@ -1457,11 +1503,11 @@ int tscBuildCreateTableMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
 
     pMsg = (char *)pSchema;
     if (type == TSQL_CREATE_STREAM) {  // check if it is a stream sql
-      SQuerySQL *pQuerySql = pInfo->pCreateTableInfo->pSelect;
+      SQuerySqlNode *pQuerySql = pInfo->pCreateTableInfo->pSelect;
 
-      strncpy(pMsg, pQuerySql->selectToken.z, pQuerySql->selectToken.n + 1);
-      pCreateMsg->sqlLen = htons(pQuerySql->selectToken.n + 1);
-      pMsg += pQuerySql->selectToken.n + 1;
+      strncpy(pMsg, pQuerySql->sqlstr.z, pQuerySql->sqlstr.n + 1);
+      pCreateMsg->sqlLen = htons(pQuerySql->sqlstr.n + 1);
+      pMsg += pQuerySql->sqlstr.n + 1;
     }
   }
 
@@ -1550,9 +1596,11 @@ int tscBuildUpdateTagMsg(SSqlObj* pSql, SSqlInfo *pInfo) {
 int tscAlterDbMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
   SSqlCmd *pCmd = &pSql->cmd;
   pCmd->payloadLen = sizeof(SAlterDbMsg);
-  pCmd->msgType = TSDB_MSG_TYPE_CM_ALTER_DB;
+  pCmd->msgType = (pInfo->pMiscInfo->dbOpt.dbType == TSDB_DB_TYPE_DEFAULT) ? TSDB_MSG_TYPE_CM_ALTER_DB : TSDB_MSG_TYPE_CM_ALTER_TP;
 
   SAlterDbMsg *pAlterDbMsg = (SAlterDbMsg* )pCmd->payload;
+  pAlterDbMsg->dbType = -1;
+  
   STableMetaInfo *pTableMetaInfo = tscGetTableMetaInfoFromCmd(pCmd, pCmd->clauseIndex, 0);
   tNameExtractFullName(&pTableMetaInfo->name, pAlterDbMsg->db);
 
@@ -1571,7 +1619,7 @@ int tscBuildRetrieveFromMgmtMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
 
   SQueryInfo *pQueryInfo = tscGetQueryInfoDetail(pCmd, 0);
   SRetrieveTableMsg *pRetrieveMsg = (SRetrieveTableMsg*)pCmd->payload;
-  pRetrieveMsg->qhandle = htobe64(pSql->res.qhandle);
+  pRetrieveMsg->qId  = htobe64(pSql->res.qId);
   pRetrieveMsg->free = htons(pQueryInfo->type);
 
   return TSDB_CODE_SUCCESS;
@@ -2079,19 +2127,24 @@ int tscProcessSTableVgroupRsp(SSqlObj *pSql) {
     assert(pInfo->vgroupList != NULL);
 
     pInfo->vgroupList->numOfVgroups = pVgroupMsg->numOfVgroups;
-    for (int32_t j = 0; j < pInfo->vgroupList->numOfVgroups; ++j) {
-      //just init, no need to lock
-      SVgroupInfo *pVgroups = &pInfo->vgroupList->vgroups[j];
+    if (pInfo->vgroupList->numOfVgroups <= 0) {
+      //tfree(pInfo->vgroupList);
+      tscError("%p empty vgroup info", pSql);
+    } else {
+      for (int32_t j = 0; j < pInfo->vgroupList->numOfVgroups; ++j) {
+        //just init, no need to lock
+        SVgroupInfo *pVgroups = &pInfo->vgroupList->vgroups[j];
 
-      SVgroupMsg *vmsg = &pVgroupMsg->vgroups[j];
-      pVgroups->vgId = htonl(vmsg->vgId);
-      pVgroups->numOfEps = vmsg->numOfEps;
+        SVgroupMsg *vmsg = &pVgroupMsg->vgroups[j];
+        pVgroups->vgId = htonl(vmsg->vgId);
+        pVgroups->numOfEps = vmsg->numOfEps;
 
-      assert(pVgroups->numOfEps >= 1 && pVgroups->vgId >= 1);
+        assert(pVgroups->numOfEps >= 1 && pVgroups->vgId >= 1);
 
-      for (int32_t k = 0; k < pVgroups->numOfEps; ++k) {
-        pVgroups->epAddr[k].port = htons(vmsg->epAddr[k].port);
-        pVgroups->epAddr[k].fqdn = strndup(vmsg->epAddr[k].fqdn, tListLen(vmsg->epAddr[k].fqdn));
+        for (int32_t k = 0; k < pVgroups->numOfEps; ++k) {
+          pVgroups->epAddr[k].port = htons(vmsg->epAddr[k].port);
+          pVgroups->epAddr[k].fqdn = strndup(vmsg->epAddr[k].fqdn, tListLen(vmsg->epAddr[k].fqdn));
+        }
       }
     }
 
@@ -2117,7 +2170,7 @@ int tscProcessShowRsp(SSqlObj *pSql) {
 
   pShow = (SShowRsp *)pRes->pRsp;
   pShow->qhandle = htobe64(pShow->qhandle);
-  pRes->qhandle = pShow->qhandle;
+  pRes->qId = pShow->qhandle;
 
   tscResetForNextRetrieve(pRes);
   pMetaMsg = &(pShow->tableMeta);
@@ -2299,11 +2352,12 @@ int tscProcessQueryRsp(SSqlObj *pSql) {
   SSqlRes *pRes = &pSql->res;
 
   SQueryTableRsp *pQuery = (SQueryTableRsp *)pRes->pRsp;
-  pQuery->qhandle = htobe64(pQuery->qhandle);
-  pRes->qhandle = pQuery->qhandle;
+  pQuery->qId = htobe64(pQuery->qId);
+  pRes->qId   = pQuery->qId;
 
   pRes->data = NULL;
   tscResetForNextRetrieve(pRes);
+  tscDebug("%p query rsp received, qId:%"PRIu64, pSql, pRes->qId);
   return 0;
 }
 
@@ -2361,7 +2415,8 @@ int tscProcessRetrieveRspFromNode(SSqlObj *pSql) {
   }
 
   pRes->row = 0;
-  tscDebug("%p numOfRows:%d, offset:%" PRId64 ", complete:%d", pSql, pRes->numOfRows, pRes->offset, pRes->completed);
+  tscDebug("%p numOfRows:%d, offset:%" PRId64 ", complete:%d, qId:%"PRIu64, pSql, pRes->numOfRows, pRes->offset,
+      pRes->completed, pRes->qId);
 
   return 0;
 }
@@ -2574,6 +2629,7 @@ void tscInitMsgsFp() {
   tscBuildMsg[TSDB_SQL_DROP_USER] = tscBuildDropUserAcctMsg;
   tscBuildMsg[TSDB_SQL_DROP_ACCT] = tscBuildDropUserAcctMsg;
   tscBuildMsg[TSDB_SQL_DROP_DB] = tscBuildDropDbMsg;
+  tscBuildMsg[TSDB_SQL_SYNC_DB_REPLICA] = tscBuildSyncDbReplicaMsg;
   tscBuildMsg[TSDB_SQL_DROP_TABLE] = tscBuildDropTableMsg;
   tscBuildMsg[TSDB_SQL_ALTER_USER] = tscBuildUserMsg;
   tscBuildMsg[TSDB_SQL_CREATE_DNODE] = tscBuildCreateDnodeMsg;

src/client/src/tscSql.c

@@ -476,7 +476,7 @@ TAOS_ROW taos_fetch_row(TAOS_RES *res) {
   SSqlCmd *pCmd = &pSql->cmd;
   SSqlRes *pRes = &pSql->res;
   
-  if (pRes->qhandle == 0 ||
+  if (pRes->qId == 0 ||
       pRes->code == TSDB_CODE_TSC_QUERY_CANCELLED ||
       pCmd->command == TSDB_SQL_RETRIEVE_EMPTY_RESULT ||
       pCmd->command == TSDB_SQL_INSERT) {
@@ -508,7 +508,7 @@ int taos_fetch_block(TAOS_RES *res, TAOS_ROW *rows) {
   SSqlCmd *pCmd = &pSql->cmd;
   SSqlRes *pRes = &pSql->res;
 
-  if (pRes->qhandle == 0 ||
+  if (pRes->qId == 0 ||
       pRes->code == TSDB_CODE_TSC_QUERY_CANCELLED ||
       pCmd->command == TSDB_SQL_RETRIEVE_EMPTY_RESULT ||
       pCmd->command == TSDB_SQL_INSERT) {
@@ -554,7 +554,7 @@ static bool tscKillQueryInDnode(SSqlObj* pSql) {
   SSqlCmd* pCmd = &pSql->cmd;
   SSqlRes* pRes = &pSql->res;
 
-  if (pRes == NULL || pRes->qhandle == 0) {
+  if (pRes == NULL || pRes->qId == 0) {
     return true;
   }
 
@@ -1050,7 +1050,7 @@ int taos_load_table_info(TAOS *taos, const char *tableNameList) {
    * If qhandle is NOT set 0, the function of taos_free_result() will send message to server by calling tscProcessSql()
    * to free connection, which may cause segment fault, when the parse phrase is not even successfully executed.
    */
-  pRes->qhandle = 0;
+  pRes->qId = 0;
   free(str);
 
   if (code != TSDB_CODE_SUCCESS) {

src/client/src/tscSub.c

@@ -149,7 +149,7 @@ static SSub* tscCreateSubscription(STscObj* pObj, const char* topic, const char*
   }
 
   strtolower(pSql->sqlstr, pSql->sqlstr);
-  pRes->qhandle = 0;
+  pRes->qId = 0;
   pRes->numOfRows = 1;
 
   code = tscAllocPayload(pCmd, TSDB_DEFAULT_PAYLOAD_SIZE);
@@ -448,7 +448,7 @@ SSqlObj* recreateSqlObj(SSub* pSub) {
     return NULL;
   }
 
-  pRes->qhandle = 0;
+  pRes->qId = 0;
   pRes->numOfRows = 1;
 
   int code = tscAllocPayload(pCmd, TSDB_DEFAULT_PAYLOAD_SIZE);
@@ -503,9 +503,19 @@ TAOS_RES *taos_consume(TAOS_SUB *tsub) {
   SSqlCmd *pCmd = &pSql->cmd;
   STableMetaInfo *pTableMetaInfo = tscGetTableMetaInfoFromCmd(pCmd, pCmd->clauseIndex, 0);
   SQueryInfo *pQueryInfo = tscGetQueryInfoDetail(pCmd, 0);
-  if (taosArrayGetSize(pSub->progress) > 0) { // fix crash in single tabel subscription
-    pQueryInfo->window.skey = ((SSubscriptionProgress*)taosArrayGet(pSub->progress, 0))->key;
-    tscDebug("subscribe:%s set subscribe skey:%"PRId64, pSub->topic, pQueryInfo->window.skey);
+  if (taosArrayGetSize(pSub->progress) > 0) { // fix crash in single table subscription
+
+    size_t size = taosArrayGetSize(pSub->progress);
+    TSKEY s = INT64_MAX;
+    for(int32_t i = 0; i < size; ++i) {
+      TSKEY k = ((SSubscriptionProgress*)taosArrayGet(pSub->progress, i))->key;
+      if (s > k) {
+        s = k;
+      }
+    }
+
+    pQueryInfo->window.skey = s;
+    tscDebug("subscribe:%s set next round subscribe skey:%"PRId64, pSub->topic, pQueryInfo->window.skey);
   }
 
   if (pSub->pTimer == NULL) {
@@ -536,7 +546,7 @@ TAOS_RES *taos_consume(TAOS_SUB *tsub) {
     uint32_t type = pQueryInfo->type;
     tscFreeSqlResult(pSql);
     pRes->numOfRows = 1;
-    pRes->qhandle = 0;
+    pRes->qId = 0;
     pSql->cmd.command = TSDB_SQL_SELECT;
     pQueryInfo->type = type;
 

src/client/src/tscUtil.c

@@ -97,6 +97,22 @@ bool tscQueryTags(SQueryInfo* pQueryInfo) {
   return true;
 }
 
+bool tscQueryBlockInfo(SQueryInfo* pQueryInfo) {
+  int32_t numOfCols = (int32_t) tscSqlExprNumOfExprs(pQueryInfo);
+
+  for (int32_t i = 0; i < numOfCols; ++i) {
+    SSqlExpr* pExpr = tscSqlExprGet(pQueryInfo, i);
+    int32_t functId = pExpr->functionId;
+
+    // "select count(tbname)" query
+    if (functId == TSDB_FUNC_BLKINFO) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
 bool tscIsTwoStageSTableQuery(SQueryInfo* pQueryInfo, int32_t tableIndex) {
   if (pQueryInfo == NULL) {
     return false;
@@ -223,6 +239,21 @@ bool tscIsSecondStageQuery(SQueryInfo* pQueryInfo) {
   return false;
 }
 
+bool tscGroupbyColumn(SQueryInfo* pQueryInfo) {
+  STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
+  int32_t         numOfCols = tscGetNumOfColumns(pTableMetaInfo->pTableMeta);
+
+  SSqlGroupbyExpr* pGroupbyExpr = &pQueryInfo->groupbyExpr;
+  for (int32_t k = 0; k < pGroupbyExpr->numOfGroupCols; ++k) {
+    SColIndex* pIndex = taosArrayGet(pGroupbyExpr->columnInfo, k);
+    if (!TSDB_COL_IS_TAG(pIndex->flag) && pIndex->colIndex < numOfCols) {  // group by normal columns
+      return true;
+    }
+  }
+
+  return false;
+}
+
 bool tscIsTWAQuery(SQueryInfo* pQueryInfo) {
   size_t numOfExprs = tscSqlExprNumOfExprs(pQueryInfo);
   for (int32_t i = 0; i < numOfExprs; ++i) {
@@ -1151,7 +1182,7 @@ SSqlExpr* tscSqlExprInsert(SQueryInfo* pQueryInfo, int32_t index, int16_t functi
 }
 
 SSqlExpr* tscSqlExprAppend(SQueryInfo* pQueryInfo, int16_t functionId, SColumnIndex* pColIndex, int16_t type,
-    int16_t size, int16_t resColId, int16_t interSize, bool isTagCol) {
+                           int16_t size, int16_t resColId, int16_t interSize, bool isTagCol) {
   SSqlExpr* pExpr = doCreateSqlExpr(pQueryInfo, functionId, pColIndex, type, size, resColId, interSize, isTagCol);
   taosArrayPush(pQueryInfo->exprList, &pExpr);
   return pExpr;
@@ -1271,6 +1302,34 @@ int32_t tscSqlExprCopy(SArray* dst, const SArray* src, uint64_t uid, bool deepco
   return 0;
 }
 
+bool tscColumnExists(SArray* pColumnList, SColumnIndex* pColIndex) {
+  // ignore the tbname columnIndex to be inserted into source list
+  if (pColIndex->columnIndex < 0) {
+    return false;
+  }
+  
+  size_t numOfCols = taosArrayGetSize(pColumnList);
+  int16_t col = pColIndex->columnIndex;
+
+  int32_t i = 0;
+  while (i < numOfCols) {
+    SColumn* pCol = taosArrayGetP(pColumnList, i);
+    if ((pCol->colIndex.columnIndex != col) || (pCol->colIndex.tableIndex != pColIndex->tableIndex)) {
+      ++i;
+      continue;
+    } else {
+      break;
+    }
+  }
+
+  if (i >= numOfCols || numOfCols == 0) {
+    return false;
+  }
+
+  return true;
+}
+
+
 SColumn* tscColumnListInsert(SArray* pColumnList, SColumnIndex* pColIndex) {
   // ignore the tbname columnIndex to be inserted into source list
   if (pColIndex->columnIndex < 0) {
@@ -1563,7 +1622,25 @@ int32_t tscTagCondCopy(STagCond* dest, const STagCond* src) {
   dest->tbnameCond.uid = src->tbnameCond.uid;
   dest->tbnameCond.len = src->tbnameCond.len;
 
-  memcpy(&dest->joinInfo, &src->joinInfo, sizeof(SJoinInfo));
+  dest->joinInfo.hasJoin = src->joinInfo.hasJoin;
+  
+  for (int32_t i = 0; i < TSDB_MAX_JOIN_TABLE_NUM; ++i) {
+    if (src->joinInfo.joinTables[i]) {
+      dest->joinInfo.joinTables[i] = calloc(1, sizeof(SJoinNode));
+
+      memcpy(dest->joinInfo.joinTables[i], src->joinInfo.joinTables[i], sizeof(SJoinNode));
+
+      if (src->joinInfo.joinTables[i]->tsJoin) {
+        dest->joinInfo.joinTables[i]->tsJoin = taosArrayDup(src->joinInfo.joinTables[i]->tsJoin);
+      }
+
+      if (src->joinInfo.joinTables[i]->tagJoin) {
+        dest->joinInfo.joinTables[i]->tagJoin = taosArrayDup(src->joinInfo.joinTables[i]->tagJoin);
+      }
+    }
+  }
+
+  
   dest->relType = src->relType;
   
   if (src->pCond == NULL) {
@@ -1609,6 +1686,23 @@ void tscTagCondRelease(STagCond* pTagCond) {
     taosArrayDestroy(pTagCond->pCond);
   }
 
+  for (int32_t i = 0; i < TSDB_MAX_JOIN_TABLE_NUM; ++i) {
+    SJoinNode *node = pTagCond->joinInfo.joinTables[i];
+    if (node == NULL) {
+      continue;
+    }
+
+    if (node->tsJoin != NULL) {
+      taosArrayDestroy(node->tsJoin);
+    }
+
+    if (node->tagJoin != NULL) {
+      taosArrayDestroy(node->tagJoin);
+    }
+
+    tfree(node);
+  }
+
   memset(pTagCond, 0, sizeof(STagCond));
 }
 
@@ -1733,10 +1827,15 @@ void tscInitQueryInfo(SQueryInfo* pQueryInfo) {
   pQueryInfo->fieldsInfo.internalField = taosArrayInit(4, sizeof(SInternalField));
   
   assert(pQueryInfo->exprList == NULL);
-  pQueryInfo->exprList   = taosArrayInit(4, POINTER_BYTES);
-  pQueryInfo->colList    = taosArrayInit(4, POINTER_BYTES);
-  pQueryInfo->udColumnId = TSDB_UD_COLUMN_INDEX;
-  pQueryInfo->resColumnId= -1000;
+  pQueryInfo->exprList    = taosArrayInit(4, POINTER_BYTES);
+  pQueryInfo->colList     = taosArrayInit(4, POINTER_BYTES);
+  pQueryInfo->udColumnId  = TSDB_UD_COLUMN_INDEX;
+  pQueryInfo->resColumnId = -1000;
+  pQueryInfo->limit.limit = -1;
+  pQueryInfo->limit.offset = 0;
+
+  pQueryInfo->slimit.limit = -1;
+  pQueryInfo->slimit.offset = 0;
 }
 
 int32_t tscAddSubqueryInfo(SSqlCmd* pCmd) {
@@ -2293,16 +2392,21 @@ void tscDoQuery(SSqlObj* pSql) {
 }
 
 int16_t tscGetJoinTagColIdByUid(STagCond* pTagCond, uint64_t uid) {
-  if (pTagCond->joinInfo.left.uid == uid) {
-    return pTagCond->joinInfo.left.tagColId;
-  } else if (pTagCond->joinInfo.right.uid == uid) {
-    return pTagCond->joinInfo.right.tagColId;
-  } else {
-    assert(0);
-    return -1;
+  int32_t i = 0;
+  while (i < TSDB_MAX_JOIN_TABLE_NUM) {
+    SJoinNode* node = pTagCond->joinInfo.joinTables[i];
+    if (node && node->uid == uid) {
+      return node->tagColId;
+    }
+
+    i++;
   }
+
+  assert(0);
+  return -1;
 }
 
+
 int16_t tscGetTagColIndexById(STableMeta* pTableMeta, int16_t colId) {
   int32_t numOfTags = tscGetNumOfTags(pTableMeta);
 

src/common/inc/tcmdtype.h

@@ -51,6 +51,7 @@ enum {
   TSDB_DEFINE_SQL_TYPE( TSDB_SQL_ALTER_ACCT, "alter-acct" )
   TSDB_DEFINE_SQL_TYPE( TSDB_SQL_ALTER_TABLE, "alter-table" )
   TSDB_DEFINE_SQL_TYPE( TSDB_SQL_ALTER_DB, "alter-db" )
+  TSDB_DEFINE_SQL_TYPE(TSDB_SQL_SYNC_DB_REPLICA, "sync db-replica")
   TSDB_DEFINE_SQL_TYPE( TSDB_SQL_CREATE_MNODE, "create-mnode" )
   TSDB_DEFINE_SQL_TYPE( TSDB_SQL_DROP_MNODE, "drop-mnode" )
   TSDB_DEFINE_SQL_TYPE( TSDB_SQL_CREATE_DNODE, "create-dnode" )
@@ -87,13 +88,13 @@ enum {
    */
   TSDB_DEFINE_SQL_TYPE( TSDB_SQL_RETRIEVE_EMPTY_RESULT, "retrieve-empty-result" )
 
-  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_RESET_CACHE, "reset-cache" )
-  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_SERV_STATUS, "serv-status" )
-  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_CURRENT_DB, "current-db" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_RESET_CACHE,  "reset-cache" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_SERV_STATUS,  "serv-status" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_CURRENT_DB,   "current-db" )
   TSDB_DEFINE_SQL_TYPE( TSDB_SQL_SERV_VERSION, "serv-version" )
-  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_CLI_VERSION, "cli-version" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_CLI_VERSION,  "cli-version" )
   TSDB_DEFINE_SQL_TYPE( TSDB_SQL_CURRENT_USER, "current-user ")
-  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_CFG_LOCAL, "cfg-local" )
+  TSDB_DEFINE_SQL_TYPE( TSDB_SQL_CFG_LOCAL,    "cfg-local" )
 
   TSDB_DEFINE_SQL_TYPE( TSDB_SQL_MAX, "max" )
 };

src/common/inc/tdataformat.h

@@ -283,12 +283,37 @@ typedef struct {
 #define keyCol(pCols) (&((pCols)->cols[0]))  // Key column
 #define dataColsTKeyAt(pCols, idx) ((TKEY *)(keyCol(pCols)->pData))[(idx)]
 #define dataColsKeyAt(pCols, idx) tdGetKey(dataColsTKeyAt(pCols, idx))
-#define dataColsTKeyFirst(pCols) (((pCols)->numOfRows == 0) ? TKEY_INVALID : dataColsTKeyAt(pCols, 0))
-#define dataColsKeyFirst(pCols) (((pCols)->numOfRows == 0) ? TSDB_DATA_TIMESTAMP_NULL : dataColsKeyAt(pCols, 0))
-#define dataColsTKeyLast(pCols) \
-  (((pCols)->numOfRows == 0) ? TKEY_INVALID : dataColsTKeyAt(pCols, (pCols)->numOfRows - 1))
-#define dataColsKeyLast(pCols) \
-  (((pCols)->numOfRows == 0) ? TSDB_DATA_TIMESTAMP_NULL : dataColsKeyAt(pCols, (pCols)->numOfRows - 1))
+static FORCE_INLINE TKEY dataColsTKeyFirst(SDataCols *pCols) {
+  if (pCols->numOfRows) {
+    return dataColsTKeyAt(pCols, 0);
+  } else {
+    return TKEY_INVALID;
+  }
+}
+
+static FORCE_INLINE TSKEY dataColsKeyFirst(SDataCols *pCols) {
+  if (pCols->numOfRows) {
+    return dataColsKeyAt(pCols, 0);
+  } else {
+    return TSDB_DATA_TIMESTAMP_NULL;
+  }
+}
+
+static FORCE_INLINE TKEY dataColsTKeyLast(SDataCols *pCols) {
+  if (pCols->numOfRows) {
+    return dataColsTKeyAt(pCols, pCols->numOfRows - 1);
+  } else {
+    return TKEY_INVALID;
+  }
+}
+
+static FORCE_INLINE TSKEY dataColsKeyLast(SDataCols *pCols) {
+  if (pCols->numOfRows) {
+    return dataColsKeyAt(pCols, pCols->numOfRows - 1);
+  } else {
+    return TSDB_DATA_TIMESTAMP_NULL;
+  }
+}
 
 SDataCols *tdNewDataCols(int maxRowSize, int maxCols, int maxRows);
 void       tdResetDataCols(SDataCols *pCols);

src/common/inc/tglobal.h

@@ -95,6 +95,7 @@ extern int8_t  tsCompression;
 extern int8_t  tsWAL;
 extern int32_t tsFsyncPeriod;
 extern int32_t tsReplications;
+extern int16_t tsPartitons;
 extern int32_t tsQuorum;
 extern int8_t  tsUpdate;
 extern int8_t  tsCacheLastRow;
@@ -162,6 +163,7 @@ extern float   tsTotalDataDirGB;
 extern float   tsAvailLogDirGB;
 extern float   tsAvailTmpDirectorySpace;
 extern float   tsAvailDataDirGB;
+extern float   tsUsedDataDirGB;
 extern float   tsMinimalLogDirGB;
 extern float   tsReservedTmpDirectorySpace;
 extern float   tsMinimalDataDirGB;

src/common/inc/tname.h

@@ -33,7 +33,7 @@ typedef struct SDataStatis {
 
 typedef struct SColumnInfoData {
   SColumnInfo info;
-  void* pData;    // the corresponding block data in memory
+  char* pData;    // the corresponding block data in memory
 } SColumnInfoData;
 
 typedef struct SResPair {

src/common/src/texpr.c

@@ -41,41 +41,46 @@ static uint8_t UNUSED_FUNC isQueryOnPrimaryKey(const char *primaryColumnName, co
 
 static void reverseCopy(char* dest, const char* src, int16_t type, int32_t numOfRows) {
   switch(type) {
-    case TSDB_DATA_TYPE_TINYINT: {
+    case TSDB_DATA_TYPE_TINYINT:
+    case TSDB_DATA_TYPE_UTINYINT:{
       int8_t* p = (int8_t*) dest;
       int8_t* pSrc = (int8_t*) src;
 
       for(int32_t i = 0; i < numOfRows; ++i) {
         p[i] = pSrc[numOfRows - i - 1];
       }
-      break;
+      return;
     }
-    case TSDB_DATA_TYPE_SMALLINT: {
+
+    case TSDB_DATA_TYPE_SMALLINT:
+    case TSDB_DATA_TYPE_USMALLINT:{
       int16_t* p = (int16_t*) dest;
       int16_t* pSrc = (int16_t*) src;
 
       for(int32_t i = 0; i < numOfRows; ++i) {
         p[i] = pSrc[numOfRows - i - 1];
       }
-      break;
+      return;
     }
-    case TSDB_DATA_TYPE_INT: {
+    case TSDB_DATA_TYPE_INT:
+    case TSDB_DATA_TYPE_UINT: {
       int32_t* p = (int32_t*) dest;
       int32_t* pSrc = (int32_t*) src;
 
       for(int32_t i = 0; i < numOfRows; ++i) {
         p[i] = pSrc[numOfRows - i - 1];
       }
-      break;
+      return;
     }
-    case TSDB_DATA_TYPE_BIGINT: {
+    case TSDB_DATA_TYPE_BIGINT:
+    case TSDB_DATA_TYPE_UBIGINT: {
       int64_t* p = (int64_t*) dest;
       int64_t* pSrc = (int64_t*) src;
 
       for(int32_t i = 0; i < numOfRows; ++i) {
         p[i] = pSrc[numOfRows - i - 1];
       }
-      break;
+      return;
     }
     case TSDB_DATA_TYPE_FLOAT: {
       float* p = (float*) dest;
@@ -84,7 +89,7 @@ static void reverseCopy(char* dest, const char* src, int16_t type, int32_t numOf
       for(int32_t i = 0; i < numOfRows; ++i) {
         p[i] = pSrc[numOfRows - i - 1];
       }
-      break;
+      return;
     }
     case TSDB_DATA_TYPE_DOUBLE: {
       double* p = (double*) dest;
@@ -93,7 +98,7 @@ static void reverseCopy(char* dest, const char* src, int16_t type, int32_t numOf
       for(int32_t i = 0; i < numOfRows; ++i) {
         p[i] = pSrc[numOfRows - i - 1];
       }
-      break;
+      return;
     }
     default: assert(0);
   }

src/connector/jdbc/CMakeLists.txt

@@ -8,7 +8,7 @@ IF (TD_MVN_INSTALLED)
   ADD_CUSTOM_COMMAND(OUTPUT ${JDBC_CMD_NAME}
     POST_BUILD
     COMMAND mvn -Dmaven.test.skip=true install -f ${CMAKE_CURRENT_SOURCE_DIR}/pom.xml
-    COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/target/taos-jdbcdriver-2.0.21-dist.jar ${LIBRARY_OUTPUT_PATH}
+    COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/target/taos-jdbcdriver-2.0.22-dist.jar ${LIBRARY_OUTPUT_PATH}
     COMMAND mvn -Dmaven.test.skip=true clean -f ${CMAKE_CURRENT_SOURCE_DIR}/pom.xml
     COMMENT "build jdbc driver")
   ADD_CUSTOM_TARGET(${JDBC_TARGET_NAME} ALL WORKING_DIRECTORY ${EXECUTABLE_OUTPUT_PATH} DEPENDS ${JDBC_CMD_NAME})