[td-225]merge develop.

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

@@ -2,25 +2,25 @@
 
 ## <a class="anchor" id="install"></a>快捷安装
 
-TDengine软件分为服务器、客户端和报警模块三部分，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、mac OS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。
+TDengine 软件分为服务器、客户端和报警模块三部分，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、Mac OS 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。
 
 ### <a class="anchor" id="source-install"></a>通过源码安装
 
-请参考我们的[TDengine github主页](https://github.com/taosdata/TDengine)下载源码并安装.
+请参考我们的 [TDengine github 主页](https://github.com/taosdata/TDengine) 下载源码并安装.
 
-### 通过Docker容器运行
+### 通过 Docker 容器运行
 
-暂时不建议生产环境采用 Docker 来部署 TDengine 的客户端或服务端，但在开发环境下或初次尝试时，使用 Docker 方式部署是十分方便的。特别是，利用 Docker，可以方便地在 Mac OSX 和 Windows 环境下尝试 TDengine。
+暂时不建议生产环境采用 Docker 来部署 TDengine 的客户端或服务端，但在开发环境下或初次尝试时，使用 Docker 方式部署是十分方便的。特别是，利用 Docker，可以方便地在 Mac OS X 和 Windows 环境下尝试 TDengine。
 
-详细操作方法请参照 [通过Docker快速体验TDengine](https://www.taosdata.com/cn/documentation/getting-started/docker)。
+详细操作方法请参照 [通过 Docker 快速体验 TDengine](https://www.taosdata.com/cn/documentation/getting-started/docker)。
 
 ### <a class="anchor" id="package-install"></a>通过安装包安装
 
-TDengine的安装非常简单，从下载到安装成功仅仅只要几秒钟。服务端安装包包含客户端和连接器，我们提供三种安装包，您可以根据需要选择：
+TDengine 的安装非常简单，从下载到安装成功仅仅只要几秒钟。服务端安装包包含客户端和连接器，我们提供三种安装包，您可以根据需要选择：
 
-安装包下载在[这里](https://www.taosdata.com/cn/getting-started/#通过安装包安装)。
+安装包下载在 [这里](https://www.taosdata.com/cn/getting-started/#通过安装包安装)。
 
-具体的安装过程，请参见[TDengine多种安装包的安装和卸载](https://www.taosdata.com/blog/2019/08/09/566.html)以及[视频教程](https://www.taosdata.com/blog/2020/11/11/1941.html)。
+具体的安装过程，请参见 [TDengine 多种安装包的安装和卸载](https://www.taosdata.com/blog/2019/08/09/566.html) 以及 [视频教程](https://www.taosdata.com/blog/2020/11/11/1941.html)。
 
 ## <a class="anchor" id="start"></a>轻松启动
 
@@ -53,21 +53,21 @@ $ systemctl status taosd
   如果系统中不支持 systemd，也可以用手动运行 /usr/local/taos/bin/taosd 方式启动 TDengine 服务。
 
   
-## <a class="anchor" id="console"></a>TDengine命令行程序
+## <a class="anchor" id="console"></a>TDengine 命令行程序
 
-执行TDengine命令行程序，您只要在Linux终端执行`taos`即可。
+执行 TDengine 命令行程序，您只要在 Linux 终端执行 `taos` 即可。
 
 ```bash
 $ taos
 ```
 
-如果TDengine终端连接服务成功，将会打印出欢迎消息和版本信息。如果失败，则会打印错误消息出来（请参考[FAQ](https://www.taosdata.com/cn/documentation/faq/)来解决终端连接服务端失败的问题）。TDengine终端的提示符号如下：
+如果 TDengine 终端连接服务成功，将会打印出欢迎消息和版本信息。如果失败，则会打印错误消息出来（请参考 [FAQ](https://www.taosdata.com/cn/documentation/faq/) 来解决终端连接服务端失败的问题）。TDengine 终端的提示符号如下：
 
 ```cmd
 taos>
 ```
 
-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。在终端中运行的SQL语句需要以分号结束来运行。示例：
+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。在终端中运行的 SQL 语句需要以分号结束来运行。示例：
 
 ```mysql
 create database demo;
@@ -77,23 +77,23 @@ 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)
+========================================
+ 2019-07-15 00:00:00.000 |          10 |
+ 2019-07-15 01:00:00.000 |          20 |
+Query OK, 2 row(s) in set (0.003128s)
 ```
 
-除执行SQL语句外，系统管理员还可以从TDengine终端检查系统运行状态，添加删除用户账号等。
+除执行 SQL 语句外，系统管理员还可以从 TDengine 终端检查系统运行状态，添加删除用户账号等。
 
 ### 命令行参数
 
-您可通过配置命令行参数来改变TDengine终端的行为。以下为常用的几个命令行参数：
+您可通过配置命令行参数来改变 TDengine 终端的行为。以下为常用的几个命令行参数：
 
-- -c, --config-dir: 指定配置文件目录，默认为_/etc/taos_
-- -h, --host: 指定服务的IP地址，默认为本地服务
-- -s, --commands: 在不进入终端的情况下运行TDengine命令
-- -u, -- user:  连接TDengine服务器的用户名，缺省为root
-- -p, --password: 连接TDengine服务器的密码，缺省为taosdata
+- -c, --config-dir: 指定配置文件目录，默认为 _/etc/taos_
+- -h, --host: 指定服务的 FQDN 地址（也可以使用 IP），默认为连接本地服务
+- -s, --commands: 在不进入终端的情况下运行 TDengine 命令
+- -u, --user: 连接 TDengine 服务器的用户名，缺省为 root
+- -p, --password: 连接TDengine服务器的密码，缺省为 taosdata
 - -?, --help: 打印出所有命令行参数
 
 示例：
@@ -102,7 +102,7 @@ Query OK, 2 row(s) in set (0.001700s)
 $ taos -h 192.168.0.1 -s "use db; show tables;"
 ```
 
-### 运行SQL命令脚本
+### 运行 SQL 命令脚本
 
 TDengine 终端可以通过 `source` 命令来运行 SQL 命令脚本.
 
@@ -110,27 +110,27 @@ TDengine 终端可以通过 `source` 命令来运行 SQL 命令脚本.
 taos> source <filename>;
 ```
 
-### Shell小技巧
+### Shell 小技巧
 
 - 可以使用上下光标键查看历史输入的指令
-- 修改用户密码。在 shell 中使用 alter user 指令
+- 修改用户密码，在 shell 中使用 alter user 指令
 - ctrl+c 中止正在进行中的查询
 - 执行 `RESET QUERY CACHE` 清空本地缓存的表 schema
 
 
 ## <a class="anchor" id="demo"></a>TDengine 极速体验
 
-启动TDengine的服务，在Linux终端执行taosdemo
+启动 TDengine 的服务，在 Linux 终端执行 taosdemo
 
 ```bash
 $ taosdemo
 ```
 
-该命令将在数据库test下面自动创建一张超级表meters，该超级表下有1万张表，表名为"t0" 到"t9999"，每张表有10万条记录，每条记录有 （f1, f2， f3）三个字段，时间戳从"2017-07-14 10:40:00 000" 到"2017-07-14 10:41:39 999"，每张表带有标签areaid和loc, areaid被设置为1到10, loc被设置为"beijing"或者“shanghai"。
+该命令将在数据库 test 下面自动创建一张超级表 meters，该超级表下有 1 万张表，表名为 "t0" 到 "t9999"，每张表有 1 万条记录，每条记录有 (ts, current, voltage, phase) 四个字段，时间戳从 "2017-07-14 10:40:00 000" 到 "2017-07-14 10:40:09 999"，每张表带有标签 location 和 groupdId，groupdId 被设置为 1 到 10， location 被设置为 "beijing" 或者 "shanghai"。
 
-执行这条命令大概需要10分钟，最后共插入10亿条记录。
+执行这条命令大概需要几分钟，最后共插入 1 亿条记录。
 
-在TDengine客户端输入查询命令，体验查询速度。
+在 TDengine 客户端输入查询命令，体验查询速度。
 
 - 查询超级表下记录总条数：
 
@@ -138,49 +138,43 @@ $ taosdemo
 taos> select count(*) from test.meters;
 ```
 
-- 查询10亿条记录的平均值、最大值、最小值等：
+- 查询 1 亿条记录的平均值、最大值、最小值等：
 
 ```mysql
-taos> select avg(f1), max(f2), min(f3) from test.meters;
+taos> select avg(current), max(voltage), min(phase) from test.meters;
 ```
 
-- 查询loc="beijing"的记录总条数：
+- 查询 location="beijing" 的记录总条数：
 
 ```mysql
-taos> select count(*) from test.meters where loc="beijing";
+taos> select count(*) from test.meters where location="beijing";
 ```
 
-- 查询areaid=10的所有记录的平均值、最大值、最小值等：
+- 查询 groupdId=10 的所有记录的平均值、最大值、最小值等：
 
 ```mysql
-taos> select avg(f1), max(f2), min(f3) from test.meters where areaid=10;
+taos> select avg(current), max(voltage), min(phase) from test.meters where groupdId=10;
 ```
 
-- 对表t10按10s进行平均值、最大值和最小值聚合统计：
+- 对表 t10 按 10s 进行平均值、最大值和最小值聚合统计：
 
 ```mysql
-taos> select avg(f1), max(f2), min(f3) from test.t10 interval(10s);
+taos> select avg(current), max(voltage), min(phase) from test.t10 interval(10s);
 ```
 
-**Note:** taosdemo命令本身带有很多选项，配置表的数目、记录条数等等，请执行 `taosdemo --help`详细列出。您可以设置不同参数进行体验。
+**Note:** taosdemo 命令本身带有很多选项，配置表的数目、记录条数等等，请执行 `taosdemo --help` 详细列出。您可以设置不同参数进行体验。
 
 
 ## 客户端和报警模块
 
-如果客户端和服务端运行在不同的电脑上，可以单独安装客户端。Linux和Windows安装包如下：
+如果客户端和服务端运行在不同的电脑上，可以单独安装客户端。Linux 和 Windows 安装包可以在 [这里](https://www.taosdata.com/cn/getting-started/#客户端) 下载。
 
-- TDengine-client-2.0.10.0-Linux-x64.tar.gz(3.0M)
-- TDengine-client-2.0.10.0-Windows-x64.exe(2.8M)
-- TDengine-client-2.0.10.0-Windows-x86.exe(2.8M)
-
-报警模块的Linux安装包如下（请参考[报警模块的使用方法](https://github.com/taosdata/TDengine/blob/master/alert/README_cn.md)）：
-
-- TDengine-alert-2.0.10.0-Linux-x64.tar.gz (8.1M)
+报警模块的 Linux 和 Windows 安装包请在 [所有下载链接](https://www.taosdata.com/cn/all-downloads/) 页面搜索“TDengine Alert Linux”章节或“TDengine Alert Windows”章节进行下载。使用方法请参考 [报警模块的使用方法](https://github.com/taosdata/TDengine/blob/master/alert/README_cn.md)。
 
   
 ## <a class="anchor" id="platforms"></a>支持平台列表
 
-### TDengine服务器支持的平台列表
+### TDengine 服务器支持的平台列表
 
 |                | **CentOS 6/7/8** | **Ubuntu 16/18/20** | **Other Linux** | **统信 UOS** | **银河/中标麒麟** | **凝思 V60/V80** | **华为 EulerOS** |
 | -------------- | --------------------- | ------------------------ | --------------- | --------------- | ------------------------- | --------------------- | --------------------- |
@@ -201,9 +195,9 @@ taos> select avg(f1), max(f2), min(f3) from test.t10 interval(10s);
 
 
 
-### TDengine客户端和连接器支持的平台列表
+### TDengine 客户端和连接器支持的平台列表
 
-目前TDengine的连接器可支持的平台广泛，目前包括：X64/X86/ARM64/ARM32/MIPS/Alpha等硬件平台，以及Linux/Win64/Win32等开发环境。
+目前 TDengine 的连接器可支持的平台广泛，目前包括：X64/X86/ARM64/ARM32/MIPS/Alpha 等硬件平台，以及 Linux/Win64/Win32 等开发环境。
 
 对照矩阵如下：
 
@@ -220,5 +214,5 @@ taos> select avg(f1), max(f2), min(f3) from test.t10 interval(10s);
 
 注： ● 表示经过官方测试验证， ○ 表示非官方测试验证。
 
-请跳转到 [连接器](https://www.taosdata.com/cn/documentation/connector)查看更详细的信息。
+请跳转到 [连接器](https://www.taosdata.com/cn/documentation/connector) 查看更详细的信息。
 

src/client/src/tscParseInsert.c

@@ -1129,6 +1129,7 @@ int tsParseInsertSql(SSqlObj *pSql) {
   SSqlCmd *pCmd = &pSql->cmd;
 
   SInsertStatementParam* pInsertParam = &pCmd->insertParam;
+  pInsertParam->objectId = pSql->self;
   char* str = pInsertParam->sql;
 
   int32_t totalNum = 0;

src/client/src/tscParseLineProtocol.c

+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "os.h"
+#include "osString.h"
+#include "ttype.h"
+#include "tmd5.h"
+#include "tstrbuild.h"
+#include "tname.h"
+#include "hash.h"
+#include "tskiplist.h"
+
+#include "tscUtil.h"
+#include "tsclient.h"
+#include "tscLog.h"
+
+#include "taos.h"
+typedef struct  {
+  char sTableName[TSDB_TABLE_NAME_LEN];
+  SHashObj* tagHash;
+  SHashObj* fieldHash;
+  SArray* tags; //SArray<SSchema>
+  SArray* fields; //SArray<SSchema>
+  uint8_t precision;
+} SSmlSTableSchema;
+
+typedef struct {
+  char* key;
+  uint8_t type;
+  int16_t length;
+  char* value;
+
+  //===================================
+  SSchema* schema;
+} TAOS_SML_KV;
+
+typedef struct {
+  char* stableName;
+
+  char* childTableName;
+  TAOS_SML_KV* tags;
+  int tagNum;
+
+  // first kv must be timestamp
+  TAOS_SML_KV* fields;
+  int fieldNum;
+
+  //================================
+  SSmlSTableSchema* schema;
+} TAOS_SML_DATA_POINT;
+
+//=================================================================================================
+
+int compareSmlColKv(const void* p1, const void* p2) {
+  TAOS_SML_KV* kv1 = (TAOS_SML_KV*)p1;
+  TAOS_SML_KV* kv2 = (TAOS_SML_KV*)p2;
+  int kvLen1 = (int)strlen(kv1->key);
+  int kvLen2 = (int)strlen(kv2->key);
+  int res = strncasecmp(kv1->key, kv2->key, MIN(kvLen1, kvLen2));
+  if (res != 0) {
+    return res;
+  } else {
+    return kvLen1-kvLen2;
+  }
+}
+
+typedef enum {
+  SCHEMA_ACTION_CREATE_STABLE,
+  SCHEMA_ACTION_ADD_COLUMN,
+  SCHEMA_ACTION_ADD_TAG,
+  SCHEMA_ACTION_CHANGE_COLUMN_SIZE,
+  SCHEMA_ACTION_CHANGE_TAG_SIZE,
+} ESchemaAction;
+
+typedef struct {
+  char sTableName[TSDB_TABLE_NAME_LEN];
+  SArray* tags; //SArray<SSchema>
+  SArray* fields; //SArray<SSchema>
+} SCreateSTableActionInfo;
+
+typedef struct {
+  char sTableName[TSDB_TABLE_NAME_LEN];
+  SSchema* field;
+} SAlterSTableActionInfo;
+
+typedef struct {
+  ESchemaAction action;
+  union {
+    SCreateSTableActionInfo createSTable;
+    SAlterSTableActionInfo alterSTable;
+  };
+} SSchemaAction;
+
+static int32_t getFieldBytesFromSmlKv(TAOS_SML_KV* kv, int32_t* bytes) {
+  if (!IS_VAR_DATA_TYPE(kv->type)) {
+    *bytes = tDataTypes[kv->type].bytes;
+  } else {
+    if (kv->type == TSDB_DATA_TYPE_NCHAR) {
+      char* ucs = malloc(kv->length * TSDB_NCHAR_SIZE + 1);
+      int32_t bytesNeeded = 0;
+      bool succ = taosMbsToUcs4(kv->value, kv->length, ucs, kv->length * TSDB_NCHAR_SIZE, &bytesNeeded);
+      if (!succ) {
+        free(ucs);
+        tscError("convert nchar string to UCS4_LE failed:%s", kv->value);
+        return TSDB_CODE_TSC_INVALID_VALUE;
+      }
+      free(ucs);
+      *bytes =  bytesNeeded + VARSTR_HEADER_SIZE;
+    } else if (kv->type == TSDB_DATA_TYPE_BINARY) {
+      *bytes = kv->length + VARSTR_HEADER_SIZE;
+    }
+  }
+  return 0;
+}
+
+static int32_t buildSmlKvSchema(TAOS_SML_KV* smlKv, SHashObj* hash, SArray* array) {
+  SSchema* pField = NULL;
+  SSchema** ppField = taosHashGet(hash, smlKv->key, strlen(smlKv->key));
+  int32_t code = 0;
+  if (ppField) {
+    pField = *ppField;
+
+    if (pField->type != smlKv->type) {
+      tscError("type mismatch. key %s, type %d. type before %d", smlKv->key, smlKv->type, pField->type);
+      return TSDB_CODE_TSC_INVALID_VALUE;
+    }
+
+    int32_t bytes = 0;
+    code = getFieldBytesFromSmlKv(smlKv, &bytes);
+    if (code != 0) {
+      return code;
+    }
+    pField->bytes = MAX(pField->bytes, bytes);
+
+  } else {
+    SSchema field = {0};
+    size_t tagKeyLen = strlen(smlKv->key);
+    strncpy(field.name, smlKv->key, tagKeyLen);
+    field.name[tagKeyLen] = '\0';
+    field.type = smlKv->type;
+
+    int32_t bytes = 0;
+    code = getFieldBytesFromSmlKv(smlKv, &bytes);
+    if (code != 0) {
+      return code;
+    }
+    field.bytes = bytes;
+
+    pField = taosArrayPush(array, &field);
+    taosHashPut(hash, field.name, tagKeyLen, &pField, POINTER_BYTES);
+  }
+
+  smlKv->schema = pField;
+
+  return 0;
+}
+
+static int32_t buildDataPointSchemas(TAOS_SML_DATA_POINT* points, int numPoint, SArray* stableSchemas) {
+  int32_t code = 0;
+  SHashObj* sname2shema = taosHashInit(32,
+                                       taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), true, false);
+
+  for (int i = 0; i < numPoint; ++i) {
+    TAOS_SML_DATA_POINT* point = &points[i];
+    size_t stableNameLen = strlen(point->stableName);
+    SSmlSTableSchema** ppStableSchema = taosHashGet(sname2shema, point->stableName, stableNameLen);
+    SSmlSTableSchema* pStableSchema = NULL;
+    if (ppStableSchema) {
+      pStableSchema= *ppStableSchema;
+    } else {
+      SSmlSTableSchema schema;
+      strncpy(schema.sTableName, point->stableName, stableNameLen);
+      schema.sTableName[stableNameLen] = '\0';
+      schema.fields = taosArrayInit(64, sizeof(SSchema));
+      schema.tags = taosArrayInit(8, sizeof(SSchema));
+      schema.tagHash = taosHashInit(8, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), true, false);
+      schema.fieldHash = taosHashInit(64, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), true, false);
+
+      pStableSchema = taosArrayPush(stableSchemas, &schema);
+      taosHashPut(sname2shema, schema.sTableName, stableNameLen, &pStableSchema, POINTER_BYTES);
+    }
+
+    for (int j = 0; j < point->tagNum; ++j) {
+      TAOS_SML_KV* tagKv = point->tags + j;
+      code = buildSmlKvSchema(tagKv, pStableSchema->tagHash, pStableSchema->tags);
+      if (code != 0) {
+        tscError("build data point schema failed. point no.: %d, tag key: %s", i, tagKv->key);
+        return code;
+      }
+    }
+
+    for (int j = 0; j < point->fieldNum; ++j) {
+      TAOS_SML_KV* fieldKv = point->fields + j;
+      code = buildSmlKvSchema(fieldKv, pStableSchema->fieldHash, pStableSchema->fields);
+      if (code != 0) {
+        tscError("build data point schema failed. point no.: %d, tag key: %s", i, fieldKv->key);
+        return code;
+      }
+    }
+
+    point->schema = pStableSchema;
+  }
+
+  size_t numStables = taosArrayGetSize(stableSchemas);
+  for (int32_t i = 0; i < numStables; ++i) {
+    SSmlSTableSchema* schema = taosArrayGet(stableSchemas, i);
+    taosHashCleanup(schema->tagHash);
+    taosHashCleanup(schema->fieldHash);
+  }
+  taosHashCleanup(sname2shema);
+
+  tscDebug("build point schema succeed. num of super table: %zu", numStables);
+  for (int32_t i = 0; i < numStables; ++i) {
+    SSmlSTableSchema* schema = taosArrayGet(stableSchemas, i);
+    tscDebug("\ttable name: %s, tags number: %zu, fields number: %zu", schema->sTableName,
+             taosArrayGetSize(schema->tags), taosArrayGetSize(schema->fields));
+  }
+
+  return 0;
+}
+
+static int32_t generateSchemaAction(SSchema* pointColField, SHashObj* dbAttrHash, bool isTag, char sTableName[],
+                                       SSchemaAction* action, bool* actionNeeded) {
+  SSchema** ppDbAttr = taosHashGet(dbAttrHash, pointColField->name, strlen(pointColField->name));
+  if (ppDbAttr) {
+    SSchema* dbAttr = *ppDbAttr;
+    if (pointColField->type != dbAttr->type) {
+      tscError("point type and db type mismatch. key: %s. point type: %d, db type: %d", pointColField->name,
+               pointColField->type, dbAttr->type);
+      return TSDB_CODE_TSC_INVALID_VALUE;
+    }
+
+    if (IS_VAR_DATA_TYPE(pointColField->type) && (pointColField->bytes > dbAttr->bytes)) {
+      if (isTag) {
+        action->action = SCHEMA_ACTION_CHANGE_TAG_SIZE;
+      } else {
+        action->action = SCHEMA_ACTION_CHANGE_COLUMN_SIZE;
+      }
+      memset(&action->alterSTable, 0,  sizeof(SAlterSTableActionInfo));
+      memcpy(action->alterSTable.sTableName, sTableName, TSDB_TABLE_NAME_LEN);
+      action->alterSTable.field = pointColField;
+      *actionNeeded = true;
+    }
+  } else {
+    if (isTag) {
+      action->action = SCHEMA_ACTION_ADD_TAG;
+    } else {
+      action->action = SCHEMA_ACTION_ADD_COLUMN;
+    }
+    memset(&action->alterSTable, 0, sizeof(SAlterSTableActionInfo));
+    memcpy(action->alterSTable.sTableName, sTableName, TSDB_TABLE_NAME_LEN);
+    action->alterSTable.field = pointColField;
+    *actionNeeded = true;
+  }
+  tscDebug("generate schema action. action needed: %d, action: %d", *actionNeeded, action->action);
+  return 0;
+}
+
+static int32_t buildColumnDescription(SSchema* field,
+                               char* buf, int32_t bufSize, int32_t* outBytes) {
+  uint8_t type = field->type;
+
+  if (type == TSDB_DATA_TYPE_BINARY || type == TSDB_DATA_TYPE_NCHAR) {
+    int32_t bytes = field->bytes - VARSTR_HEADER_SIZE;
+    if (type == TSDB_DATA_TYPE_NCHAR) {
+      bytes =  bytes/TSDB_NCHAR_SIZE;
+    }
+    int out = snprintf(buf, bufSize,"%s %s(%d)",
+                       field->name,tDataTypes[field->type].name, bytes);
+    *outBytes = out;
+  } else {
+    int out = snprintf(buf, bufSize, "%s %s",
+                       field->name, tDataTypes[type].name);
+    *outBytes = out;
+  }
+
+  return 0;
+}
+
+
+static int32_t applySchemaAction(TAOS* taos, SSchemaAction* action) {
+  int32_t code = 0;
+  int32_t capacity = TSDB_MAX_BINARY_LEN;
+  int32_t outBytes = 0;
+  char *result = (char *)calloc(1, capacity);
+
+  tscDebug("apply schema action: %d", action->action);
+  switch (action->action) {
+    case SCHEMA_ACTION_ADD_COLUMN: {
+      int n = sprintf(result, "alter stable %s add column ", action->alterSTable.sTableName);
+      buildColumnDescription(action->alterSTable.field, result+n, capacity-n, &outBytes);
+      TAOS_RES* res = taos_query(taos, result); //TODO async doAsyncQuery
+      code = taos_errno(res);
+      taos_free_result(res);
+      break;
+    }
+    case SCHEMA_ACTION_ADD_TAG: {
+      int n = sprintf(result, "alter stable %s add tag ", action->alterSTable.sTableName);
+      buildColumnDescription(action->alterSTable.field,
+                             result+n, capacity-n, &outBytes);
+      TAOS_RES* res = taos_query(taos, result); //TODO async doAsyncQuery
+      code = taos_errno(res);
+      taos_free_result(res);
+      break;
+    }
+    case SCHEMA_ACTION_CHANGE_COLUMN_SIZE: {
+      int n = sprintf(result, "alter stable %s modify column ", action->alterSTable.sTableName);
+      buildColumnDescription(action->alterSTable.field, result+n,
+                             capacity-n, &outBytes);
+      TAOS_RES* res = taos_query(taos, result); //TODO async doAsyncQuery
+      code = taos_errno(res);
+      taos_free_result(res);
+      break;
+    }
+    case SCHEMA_ACTION_CHANGE_TAG_SIZE: {
+      int n = sprintf(result, "alter stable %s modify tag ", action->alterSTable.sTableName);
+      buildColumnDescription(action->alterSTable.field, result+n,
+                             capacity-n, &outBytes);
+      TAOS_RES* res = taos_query(taos, result); //TODO async doAsyncQuery
+      code = taos_errno(res);
+      taos_free_result(res);
+      break;
+    }
+    case SCHEMA_ACTION_CREATE_STABLE: {
+      int n = sprintf(result, "create stable %s (", action->createSTable.sTableName);
+      char* pos = result + n; int freeBytes = capacity - n;
+      size_t numCols = taosArrayGetSize(action->createSTable.fields);
+      for (int32_t i = 0; i < numCols; ++i) {
+        SSchema* field = taosArrayGet(action->createSTable.fields, i);
+        buildColumnDescription(field, pos, freeBytes, &outBytes);
+        pos += outBytes; freeBytes -= outBytes;
+        *pos = ','; ++pos; --freeBytes;
+      }
+      --pos; ++freeBytes;
+
+      outBytes = snprintf(pos, freeBytes, ") tags (");
+      pos += outBytes; freeBytes -= outBytes;
+
+      size_t numTags = taosArrayGetSize(action->createSTable.tags);
+      for (int32_t i = 0; i < numTags; ++i) {
+        SSchema* field = taosArrayGet(action->createSTable.tags, i);
+        buildColumnDescription(field, pos, freeBytes, &outBytes);
+        pos += outBytes; freeBytes -= outBytes;
+        *pos = ','; ++pos; --freeBytes;
+      }
+      pos--; ++freeBytes;
+      outBytes = snprintf(pos, freeBytes, ")");
+      TAOS_RES* res = taos_query(taos, result);
+      code = taos_errno(res);
+      taos_free_result(res);
+      break;
+    }
+
+    default:
+      break;
+  }
+
+  free(result);
+  if (code != 0) {
+    tscError("apply schema action failure. %s", tstrerror(code));
+  }
+  return code;
+}
+
+static int32_t destroySmlSTableSchema(SSmlSTableSchema* schema) {
+  taosHashCleanup(schema->tagHash);
+  taosHashCleanup(schema->fieldHash);
+  taosArrayDestroy(schema->tags);
+  taosArrayDestroy(schema->fields);
+  return 0;
+}
+
+int32_t loadTableMeta(TAOS* taos, char* tableName, SSmlSTableSchema* schema) {
+  int32_t code = 0;
+
+  STscObj *pObj = (STscObj *)taos;
+  if (pObj == NULL || pObj->signature != pObj) {
+    terrno = TSDB_CODE_TSC_DISCONNECTED;
+    return TSDB_CODE_TSC_DISCONNECTED;
+  }
+
+  tscDebug("load table schema. super table name: %s", tableName);
+
+  char sql[256];
+  snprintf(sql, 256, "describe %s", tableName);
+  TAOS_RES* res = taos_query(taos, sql);
+  code = taos_errno(res);
+  if (code != 0) {
+    tscError("describe table failure. %s", taos_errstr(res));
+    taos_free_result(res);
+    return code;
+  }
+  taos_free_result(res);
+
+  SSqlObj* pSql = calloc(1, sizeof(SSqlObj));
+  pSql->pTscObj = taos;
+  pSql->signature = pSql;
+  pSql->fp = NULL;
+
+  SStrToken tableToken = {.z=tableName, .n=(uint32_t)strlen(tableName), .type=TK_ID};
+  tGetToken(tableName, &tableToken.type);
+  // Check if the table name available or not
+  if (tscValidateName(&tableToken) != TSDB_CODE_SUCCESS) {
+    code = TSDB_CODE_TSC_INVALID_TABLE_ID_LENGTH;
+    sprintf(pSql->cmd.payload, "table name is invalid");
+    return code;
+  }
+
+  SName sname = {0};
+  if ((code = tscSetTableFullName(&sname, &tableToken, pSql)) != TSDB_CODE_SUCCESS) {
+    return code;
+  }
+  char  fullTableName[TSDB_TABLE_FNAME_LEN] = {0};
+  memset(fullTableName, 0, tListLen(fullTableName));
+  tNameExtractFullName(&sname, fullTableName);
+  if (code != TSDB_CODE_SUCCESS) {
+    tscFreeSqlObj(pSql);
+    return code;
+  }
+  tscFreeSqlObj(pSql);
+
+  schema->tags = taosArrayInit(8, sizeof(SSchema));
+  schema->fields = taosArrayInit(64, sizeof(SSchema));
+  schema->tagHash = taosHashInit(8, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), true, false);
+  schema->fieldHash = taosHashInit(64, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), true, false);
+
+  uint32_t size = tscGetTableMetaMaxSize();
+  STableMeta* tableMeta = calloc(1, size);
+  taosHashGetClone(tscTableMetaInfo, fullTableName, strlen(fullTableName), NULL, tableMeta, -1);
+
+  tstrncpy(schema->sTableName, tableName, strlen(tableName)+1);
+  schema->precision = tableMeta->tableInfo.precision;
+  for (int i=0; i<tableMeta->tableInfo.numOfColumns; ++i) {
+    SSchema field;
+    tstrncpy(field.name, tableMeta->schema[i].name, strlen(tableMeta->schema[i].name)+1);
+    field.type = tableMeta->schema[i].type;
+    field.bytes = tableMeta->schema[i].bytes;
+    SSchema* pField = taosArrayPush(schema->fields, &field);
+    taosHashPut(schema->fieldHash, field.name, strlen(field.name), &pField, POINTER_BYTES);
+  }
+
+  for (int i=0; i<tableMeta->tableInfo.numOfTags; ++i) {
+    int j = i + tableMeta->tableInfo.numOfColumns;
+    SSchema field;
+    tstrncpy(field.name, tableMeta->schema[j].name, strlen(tableMeta->schema[j].name)+1);
+    field.type = tableMeta->schema[j].type;
+    field.bytes = tableMeta->schema[j].bytes;
+    SSchema* pField = taosArrayPush(schema->tags, &field);
+    taosHashPut(schema->tagHash, field.name, strlen(field.name), &pField, POINTER_BYTES);
+  }
+  tscDebug("load table meta succeed. %s, columns number: %d, tag number: %d, precision: %d",
+           tableName, tableMeta->tableInfo.numOfColumns, tableMeta->tableInfo.numOfTags, schema->precision);
+  free(tableMeta); tableMeta = NULL;
+  return code;
+}
+
+static int32_t reconcileDBSchemas(TAOS* taos, SArray* stableSchemas) {
+  int32_t code = 0;
+  size_t numStable = taosArrayGetSize(stableSchemas);
+  for (int i = 0; i < numStable; ++i) {
+    SSmlSTableSchema* pointSchema = taosArrayGet(stableSchemas, i);
+    SSmlSTableSchema  dbSchema;
+    memset(&dbSchema, 0, sizeof(SSmlSTableSchema));
+
+    code = loadTableMeta(taos, pointSchema->sTableName, &dbSchema);
+    if (code == TSDB_CODE_MND_INVALID_TABLE_NAME) {
+      SSchemaAction schemaAction = {0};
+      schemaAction.action = SCHEMA_ACTION_CREATE_STABLE;
+      memset(&schemaAction.createSTable, 0, sizeof(SCreateSTableActionInfo));
+      memcpy(schemaAction.createSTable.sTableName, pointSchema->sTableName, TSDB_TABLE_NAME_LEN);
+      schemaAction.createSTable.tags = pointSchema->tags;
+      schemaAction.createSTable.fields = pointSchema->fields;
+      applySchemaAction(taos, &schemaAction);
+      code = loadTableMeta(taos, pointSchema->sTableName, &dbSchema);
+      if (code != 0) {
+        tscError("reconcile point schema failed. can not create %s", pointSchema->sTableName);
+      } else {
+        pointSchema->precision = dbSchema.precision;
+        destroySmlSTableSchema(&dbSchema);
+      }
+    } else if (code == TSDB_CODE_SUCCESS) {
+      size_t pointTagSize = taosArrayGetSize(pointSchema->tags);
+      size_t pointFieldSize = taosArrayGetSize(pointSchema->fields);
+
+      SHashObj* dbTagHash = dbSchema.tagHash;
+      SHashObj* dbFieldHash = dbSchema.fieldHash;
+
+      for (int j = 0; j < pointTagSize; ++j) {
+        SSchema* pointTag = taosArrayGet(pointSchema->tags, j);
+        SSchemaAction schemaAction = {0};
+        bool actionNeeded = false;
+        generateSchemaAction(pointTag, dbTagHash, true, pointSchema->sTableName, &schemaAction, &actionNeeded);
+        if (actionNeeded) {
+          applySchemaAction(taos, &schemaAction);
+        }
+      }
+
+      SSchema* pointColTs = taosArrayGet(pointSchema->fields, 0);
+      SSchema* dbColTs = taosArrayGet(dbSchema.fields, 0);
+      memcpy(pointColTs->name, dbColTs->name, TSDB_COL_NAME_LEN);
+
+      for (int j = 1; j < pointFieldSize; ++j) {
+        SSchema* pointCol = taosArrayGet(pointSchema->fields, j);
+        SSchemaAction schemaAction = {0};
+        bool actionNeeded = false;
+        generateSchemaAction(pointCol, dbFieldHash, false, pointSchema->sTableName, &schemaAction, &actionNeeded);
+        if (actionNeeded) {
+          applySchemaAction(taos, &schemaAction);
+        }
+      }
+
+      pointSchema->precision = dbSchema.precision;
+
+      destroySmlSTableSchema(&dbSchema);
+    } else {
+      tscError("load table meta error: %s", tstrerror(code));
+      return code;
+    }
+  }
+  return 0;
+}
+
+static int32_t getChildTableName(TAOS_SML_DATA_POINT* point, char* tableName, int* tableNameLen) {
+  qsort(point->tags, point->tagNum, sizeof(TAOS_SML_KV), compareSmlColKv);
+
+  SStringBuilder sb; memset(&sb, 0, sizeof(sb));
+  taosStringBuilderAppendString(&sb, point->stableName);
+  for (int j = 0; j < point->tagNum; ++j) {
+    taosStringBuilderAppendChar(&sb, ',');
+    TAOS_SML_KV* tagKv = point->tags + j;
+    taosStringBuilderAppendString(&sb, tagKv->key);
+    taosStringBuilderAppendChar(&sb, '=');
+    taosStringBuilderAppend(&sb, tagKv->value, tagKv->length);
+  }
+  size_t len = 0;
+  char* keyJoined = taosStringBuilderGetResult(&sb, &len);
+  MD5_CTX context;
+  MD5Init(&context);
+  MD5Update(&context, (uint8_t *)keyJoined, (uint32_t)len);
+  MD5Final(&context);
+  *tableNameLen = snprintf(tableName, *tableNameLen,
+                           "t_%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x", context.digest[0],
+                           context.digest[1], context.digest[2], context.digest[3], context.digest[4], context.digest[5], context.digest[6],
+                           context.digest[7], context.digest[8], context.digest[9], context.digest[10], context.digest[11],
+                           context.digest[12], context.digest[13], context.digest[14], context.digest[15]);
+  taosStringBuilderDestroy(&sb);
+  tscDebug("child table name: %s", tableName);
+  return 0;
+}
+
+static int32_t creatChildTableIfNotExists(TAOS* taos, const char* cTableName, const char* sTableName, SArray* tagsSchema, SArray* tagsBind) {
+  size_t numTags = taosArrayGetSize(tagsSchema);
+  char sql[TSDB_MAX_BINARY_LEN] = {0};
+  int freeBytes = TSDB_MAX_BINARY_LEN;
+  sprintf(sql, "create table if not exists %s using %s", cTableName, sTableName);
+
+  snprintf(sql+strlen(sql), freeBytes-strlen(sql), "(");
+  for (int i = 0; i < numTags; ++i) {
+    SSchema* tagSchema = taosArrayGet(tagsSchema, i);
+    snprintf(sql+strlen(sql), freeBytes-strlen(sql), "%s,", tagSchema->name);
+  }
+  snprintf(sql + strlen(sql) - 1, freeBytes-strlen(sql)+1, ")");
+
+  snprintf(sql + strlen(sql), freeBytes-strlen(sql), " tags (");
+
+  for (int i = 0; i < numTags; ++i) {
+    snprintf(sql+strlen(sql), freeBytes-strlen(sql), "?,");
+  }
+  snprintf(sql + strlen(sql) - 1, freeBytes-strlen(sql)+1, ")");
+
+  tscDebug("create table : %s", sql);
+
+  TAOS_STMT* stmt = taos_stmt_init(taos);
+  int32_t code;
+  code = taos_stmt_prepare(stmt, sql, (unsigned long)strlen(sql));
+  if (code != 0) {
+    tscError("%s", taos_stmt_errstr(stmt));
+    return code;
+  }
+
+  code = taos_stmt_bind_param(stmt, TARRAY_GET_START(tagsBind));
+  if (code != 0) {
+    tscError("%s", taos_stmt_errstr(stmt));
+    return code;
+  }
+
+  code = taos_stmt_execute(stmt);
+  if (code != 0) {
+    tscError("%s", taos_stmt_errstr(stmt));
+    return code;
+  }
+
+  taos_stmt_close(stmt);
+  return 0;
+}
+
+static int32_t insertChildTableBatch(TAOS* taos,  char* cTableName, SArray* colsSchema, SArray* rowsBind) {
+  size_t numCols = taosArrayGetSize(colsSchema);
+  char sql[TSDB_MAX_BINARY_LEN];
+  int32_t freeBytes = TSDB_MAX_BINARY_LEN;
+  sprintf(sql, "insert into ? (");
+
+  for (int i = 0; i < numCols; ++i) {
+    SSchema* colSchema = taosArrayGet(colsSchema, i);
+    snprintf(sql+strlen(sql), freeBytes-strlen(sql), "%s,", colSchema->name);
+  }
+  snprintf(sql + strlen(sql)-1, freeBytes-strlen(sql)+1, ") values (");
+
+  for (int i = 0; i < numCols; ++i) {
+    snprintf(sql+strlen(sql), freeBytes-strlen(sql), "?,");
+  }
+  snprintf(sql + strlen(sql)-1, freeBytes-strlen(sql)+1, ")");
+
+  tscDebug("insert rows %zu into child table %s. ", taosArrayGetSize(rowsBind), cTableName);
+
+  int32_t code = 0;
+  int32_t try = 0;
+
+  TAOS_STMT* stmt = taos_stmt_init(taos);
+  
+  code = taos_stmt_prepare(stmt, sql, (unsigned long)strlen(sql));
+  if (code != 0) {
+    tscError("%s", taos_stmt_errstr(stmt));
+    return code;
+  }
+
+  do {
+
+    code = taos_stmt_set_tbname(stmt, cTableName);
+    if (code != 0) {
+      tscError("%s", taos_stmt_errstr(stmt));
+      return code;
+    }
+
+    size_t rows = taosArrayGetSize(rowsBind);
+    for (int32_t i = 0; i < rows; ++i) {
+      TAOS_BIND* colsBinds = taosArrayGetP(rowsBind, i);
+      code = taos_stmt_bind_param(stmt, colsBinds);
+      if (code != 0) {
+        tscError("%s", taos_stmt_errstr(stmt));
+        return code;
+      }
+      code = taos_stmt_add_batch(stmt);
+      if (code != 0) {
+        tscError("%s", taos_stmt_errstr(stmt));
+        return code;
+      }
+    }
+
+    code = taos_stmt_execute(stmt);
+    if (code != 0) {
+      tscError("%s", taos_stmt_errstr(stmt));
+    }
+  } while (code == TSDB_CODE_TDB_TABLE_RECONFIGURE && try++ < TSDB_MAX_REPLICA);
+
+  if (code != 0) {
+    tscError("%s", taos_stmt_errstr(stmt));
+    taos_stmt_close(stmt);
+  } else {
+    taos_stmt_close(stmt);
+  }
+
+  return code;
+}
+
+static int32_t arrangePointsByChildTableName(TAOS_SML_DATA_POINT* points, int numPoints, SHashObj* cname2points) {
+  for (int32_t i = 0; i < numPoints; ++i) {
+    TAOS_SML_DATA_POINT * point = points + i;
+    if (!point->childTableName) {
+      char childTableName[TSDB_TABLE_NAME_LEN];
+      int32_t tableNameLen = TSDB_TABLE_NAME_LEN;
+      getChildTableName(point, childTableName, &tableNameLen);
+      point->childTableName = calloc(1, tableNameLen+1);
+      strncpy(point->childTableName, childTableName, tableNameLen);
+      point->childTableName[tableNameLen] = '\0';
+    }
+
+    for (int j = 0; j < point->tagNum; ++j) {
+      TAOS_SML_KV* kv =  point->tags + j;
+      if (kv->type == TSDB_DATA_TYPE_TIMESTAMP) {
+        int64_t ts = *(int64_t*)(kv->value);
+        ts = convertTimePrecision(ts, TSDB_TIME_PRECISION_NANO, point->schema->precision);
+        *(int64_t*)(kv->value) = ts;
+      }
+    }
+
+    for (int j = 0; j < point->fieldNum; ++j) {
+      TAOS_SML_KV* kv =  point->fields + j;
+      if (kv->type == TSDB_DATA_TYPE_TIMESTAMP) {
+        int64_t ts = *(int64_t*)(kv->value);
+        ts = convertTimePrecision(ts, TSDB_TIME_PRECISION_NANO, point->schema->precision);
+        *(int64_t*)(kv->value) = ts;
+      }
+    }
+
+    SArray* cTablePoints = NULL;
+    SArray** pCTablePoints = taosHashGet(cname2points, point->childTableName, strlen(point->childTableName));
+    if (pCTablePoints) {
+      cTablePoints = *pCTablePoints;
+    } else {
+      cTablePoints = taosArrayInit(64, sizeof(point));
+      taosHashPut(cname2points, point->childTableName, strlen(point->childTableName), &cTablePoints, POINTER_BYTES);
+    }
+    taosArrayPush(cTablePoints, &point);
+  }
+
+  return 0;
+}
+
+static int32_t insertPoints(TAOS* taos, TAOS_SML_DATA_POINT* points, int32_t numPoints) {
+  SHashObj* cname2points = taosHashInit(128, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY),
+                                        true, false);
+  arrangePointsByChildTableName(points, numPoints, cname2points);
+
+  int isNullColBind = TSDB_TRUE;
+  SArray** pCTablePoints = taosHashIterate(cname2points, NULL);
+  while (pCTablePoints) {
+    SArray* cTablePoints = *pCTablePoints;
+
+    TAOS_SML_DATA_POINT * point = taosArrayGetP(cTablePoints, 0);
+    size_t numTags = taosArrayGetSize(point->schema->tags);
+    size_t numCols = taosArrayGetSize(point->schema->fields);
+
+    SArray* tagBinds = taosArrayInit(numTags, sizeof(TAOS_BIND));
+    taosArraySetSize(tagBinds, numTags);
+    for (int j = 0; j < numTags; ++j) {
+      TAOS_BIND* bind = taosArrayGet(tagBinds, j);
+      bind->is_null = &isNullColBind;
+    }
+    for (int j = 0; j < point->tagNum; ++j) {
+      TAOS_SML_KV* kv =  point->tags + j;
+      size_t idx = TARRAY_ELEM_IDX(point->schema->tags, kv->schema);
+      TAOS_BIND* bind = taosArrayGet(tagBinds, idx);
+      bind->buffer_type = kv->type;
+      bind->length = malloc(sizeof(uintptr_t*));
+      *bind->length = kv->length;
+      bind->buffer = kv->value;
+      bind->is_null = NULL;
+    }
+
+    size_t rows = taosArrayGetSize(cTablePoints);
+    SArray* rowsBind = taosArrayInit(rows, POINTER_BYTES);
+
+    for (int i = 0; i < rows; ++i) {
+      point = taosArrayGetP(cTablePoints, i);
+
+      TAOS_BIND* colBinds = calloc(numCols, sizeof(TAOS_BIND));
+      for (int j = 0; j < numCols; ++j) {
+        TAOS_BIND* bind = colBinds + j;
+        bind->is_null = &isNullColBind;
+      }
+      for (int j = 0; j < point->fieldNum; ++j) {
+        TAOS_SML_KV* kv = point->fields + j;
+        size_t idx = TARRAY_ELEM_IDX(point->schema->fields, kv->schema);
+        TAOS_BIND* bind = colBinds + idx;
+        bind->buffer_type = kv->type;
+        bind->length = malloc(sizeof(uintptr_t*));
+        *bind->length = kv->length;
+        bind->buffer = kv->value;
+        bind->is_null = NULL;
+      }
+      taosArrayPush(rowsBind, &colBinds);
+    }
+
+    creatChildTableIfNotExists(taos, point->childTableName, point->stableName, point->schema->tags, tagBinds);
+    for (int i = 0; i < taosArrayGetSize(tagBinds); ++i) {
+      TAOS_BIND* bind = taosArrayGet(tagBinds, i);
+      free(bind->length);
+    }
+    taosArrayDestroy(tagBinds);
+
+    insertChildTableBatch(taos, point->childTableName, point->schema->fields, rowsBind);
+    for (int i = 0; i < rows; ++i) {
+      TAOS_BIND* colBinds = taosArrayGetP(rowsBind, i);
+      for (int j = 0; j < numCols; ++j) {
+        TAOS_BIND* bind = colBinds + j;
+        free(bind->length);
+      }
+      free(colBinds);
+    }
+    taosArrayDestroy(rowsBind);
+    taosArrayDestroy(cTablePoints);
+
+    pCTablePoints = taosHashIterate(cname2points, pCTablePoints);
+  }
+
+  taosHashCleanup(cname2points);
+  return 0;
+}
+
+int taos_sml_insert(TAOS* taos, TAOS_SML_DATA_POINT* points, int numPoint) {
+  tscDebug("taos_sml_insert. number of points: %d", numPoint);
+
+  int32_t code = TSDB_CODE_SUCCESS;
+
+  SArray* stableSchemas = taosArrayInit(32, sizeof(SSmlSTableSchema)); // SArray<STableColumnsSchema>
+  code = buildDataPointSchemas(points, numPoint, stableSchemas);
+  if (code != 0) {
+    tscError("error building data point schemas : %s", tstrerror(code));
+    goto clean_up;
+  }
+
+  code = reconcileDBSchemas(taos, stableSchemas);
+  if (code != 0) {
+    tscError("error change db schema : %s", tstrerror(code));
+    goto clean_up;
+  }
+
+  code = insertPoints(taos, points, numPoint);
+  if (code != 0) {
+    tscError("error insert points : %s", tstrerror(code));
+  }
+
+clean_up:
+  for (int i = 0; i < taosArrayGetSize(stableSchemas); ++i) {
+    SSmlSTableSchema* schema = taosArrayGet(stableSchemas, i);
+    taosArrayDestroy(schema->fields);
+    taosArrayDestroy(schema->tags);
+  }
+  taosArrayDestroy(stableSchemas);
+  return code;
+}
+
+//=========================================================================
+
+typedef enum {
+  LP_ITEM_TAG,
+  LP_ITEM_FIELD
+} LPItemKind;
+
+typedef struct  {
+  SStrToken keyToken;
+  SStrToken valueToken;
+
+  char key[TSDB_COL_NAME_LEN];
+  int8_t type;
+  int16_t length;
+
+  char* value;
+}SLPItem;
+
+typedef struct {
+  SStrToken measToken;
+  SStrToken tsToken;
+
+  char sTableName[TSDB_TABLE_NAME_LEN];
+  SArray* tags;
+  SArray* fields;
+  int64_t ts;
+
+} SLPPoint;
+
+typedef enum {
+  LP_MEASUREMENT,
+  LP_TAG_KEY,
+  LP_TAG_VALUE,
+  LP_FIELD_KEY,
+  LP_FIELD_VALUE
+} LPPart;
+
+int32_t scanToCommaOrSpace(SStrToken s, int32_t start, int32_t* index, LPPart part) {
+  for (int32_t i = start; i < s.n; ++i) {
+    if (s.z[i] == ',' || s.z[i] == ' ') {
+      *index = i;
+      return 0;
+    }
+  }
+  return -1;
+}
+
+int32_t scanToEqual(SStrToken s, int32_t start, int32_t* index) {
+  for (int32_t i = start; i < s.n; ++i) {
+    if (s.z[i] == '=') {
+      *index = i;
+      return 0;
+    }
+  }
+  return -1;
+}
+
+int32_t setPointMeasurement(SLPPoint* point, SStrToken token) {
+  point->measToken = token;
+  if (point->measToken.n < TSDB_TABLE_NAME_LEN) {
+    strncpy(point->sTableName, point->measToken.z, point->measToken.n);
+    point->sTableName[point->measToken.n] = '\0';
+  }
+  return 0;
+}
+
+int32_t setItemKey(SLPItem* item, SStrToken key, LPPart part) {
+  item->keyToken = key;
+  if (item->keyToken.n < TSDB_COL_NAME_LEN) {
+    strncpy(item->key, item->keyToken.z, item->keyToken.n);
+    item->key[item->keyToken.n] = '\0';
+  }
+  return 0;
+}
+
+int32_t setItemValue(SLPItem* item, SStrToken value, LPPart part) {
+  item->valueToken = value;
+  return 0;
+}
+
+int32_t parseItemValue(SLPItem* item, LPItemKind kind) {
+  char* sv = item->valueToken.z;
+  char* last = item->valueToken.z + item->valueToken.n - 1;
+
+  if (isdigit(sv[0]) || sv[0] == '-') {
+    if (*last == 'i') {
+      item->type = TSDB_DATA_TYPE_BIGINT;
+      item->length = (int16_t)tDataTypes[item->type].bytes;
+      item->value = malloc(item->length);
+      char* endptr = NULL;
+      *(int64_t*)(item->value) = strtoll(sv, &endptr, 10);
+    } else if (*last == 'u') {
+      item->type = TSDB_DATA_TYPE_UBIGINT;
+      item->length = (int16_t)tDataTypes[item->type].bytes;
+      item->value = malloc(item->length);
+      char* endptr = NULL;
+      *(uint64_t*)(item->value) = (uint64_t)strtoull(sv, &endptr, 10);
+    } else if (*last == 'b') {
+      item->type = TSDB_DATA_TYPE_TINYINT;
+      item->length = (int16_t)tDataTypes[item->type].bytes;
+      item->value = malloc(item->length);
+      char* endptr = NULL;
+      *(int8_t*)(item->value) = (int8_t)strtoll(sv, &endptr, 10);
+    } else if (*last == 's') {
+      item->type = TSDB_DATA_TYPE_SMALLINT;
+      item->length = (int16_t)tDataTypes[item->type].bytes;
+      item->value = malloc(item->length);
+      char* endptr = NULL;
+      *(int16_t*)(item->value) = (int16_t)strtoll(sv, &endptr, 10);
+    } else if (*last == 'w') {
+      item->type = TSDB_DATA_TYPE_INT;
+      item->length = (int16_t)tDataTypes[item->type].bytes;
+      item->value = malloc(item->length);
+      char* endptr = NULL;
+      *(int32_t*)(item->value) = (int32_t)strtoll(sv, &endptr, 10);
+    } else if (*last == 'f') {
+      item->type = TSDB_DATA_TYPE_FLOAT;
+      item->length = (int16_t)tDataTypes[item->type].bytes;
+      item->value = malloc(item->length);
+      char* endptr = NULL;
+      *(float*)(item->value) = (float)strtold(sv, &endptr);
+    } else {
+      item->type = TSDB_DATA_TYPE_DOUBLE;
+      item->length = (int16_t)tDataTypes[item->type].bytes;
+      item->value = malloc(item->length);
+      char* endptr = NULL;
+      *(double*)(item->value) = strtold(sv, &endptr);
+    }
+  } else if ((sv[0] == 'L' && sv[1] =='"') || sv[0] == '"' ) {
+    if (sv[0] == 'L') {
+      item->type = TSDB_DATA_TYPE_NCHAR;
+      uint32_t bytes = item->valueToken.n - 3;
+      item->length = bytes;
+      item->value = malloc(bytes);
+      memcpy(item->value, sv+2, bytes);
+    } else if (sv[0]=='"'){
+      item->type = TSDB_DATA_TYPE_BINARY;
+      uint32_t bytes = item->valueToken.n - 2;
+      item->length = bytes;
+      item->value = malloc(bytes);
+      memcpy(item->value, sv+1, bytes);
+    }
+  } else if (sv[0] == 't' || sv[0] == 'f' || sv[0]=='T' || sv[0] == 'F') {
+    item->type = TSDB_DATA_TYPE_BOOL;
+    item->length = tDataTypes[item->type].bytes;
+    item->value = malloc(tDataTypes[item->type].bytes);
+    *(uint8_t*)(item->value) = tolower(sv[0])=='t' ? TSDB_TRUE : TSDB_FALSE;
+  }
+  return 0;
+}
+
+int32_t compareLPItemKey(const void* p1, const void* p2) {
+  const SLPItem* t1 = p1;
+  const SLPItem* t2 = p2;
+  uint32_t min = (t1->keyToken.n < t2->keyToken.n) ? t1->keyToken.n : t2->keyToken.n;
+  int res = strncmp(t1->keyToken.z, t2->keyToken.z, min);
+  if (res != 0) {
+    return res;
+  } else {
+    return (int)(t1->keyToken.n) - (int)(t2->keyToken.n);
+  }
+}
+
+int32_t setPointTimeStamp(SLPPoint* point, SStrToken tsToken) {
+  point->tsToken = tsToken;
+  return 0;
+}
+
+int32_t parsePointTime(SLPPoint* point) {
+  if (point->tsToken.n <= 0) {
+    point->ts = taosGetTimestampNs();
+  } else {
+    char* endptr = NULL;
+    point->ts = strtoll(point->tsToken.z, &endptr, 10);
+    char* last = point->tsToken.z + point->tsToken.n - 1;
+    if (*last == 's') {
+      point->ts *= (int64_t)1e9;
+    } else if (*last == 'a') {
+      point->ts *= (int64_t)1e6;
+    } else if (*last == 'u') {
+      point->ts *= (int64_t)1e3;
+    } else if (*last == 'b') {
+      point->ts *= 1;
+    }
+  }
+  return 0;
+}
+
+int32_t tscParseLine(SStrToken line, SLPPoint* point) {
+  int32_t pos = 0;
+
+  int32_t start = 0;
+  int32_t err = scanToCommaOrSpace(line, start, &pos, LP_MEASUREMENT);
+  if (err != 0) {
+    tscError("a");
+    return err;
+  }
+
+  SStrToken measurement = {.z = line.z+start, .n = pos-start};
+  setPointMeasurement(point, measurement);
+  point->tags = taosArrayInit(64, sizeof(SLPItem));
+  start = pos;
+  while (line.z[start] == ',') {
+    SLPItem item;
+
+    start++;
+    err = scanToEqual(line, start, &pos);
+    if (err != 0) {
+      tscError("b");
+      goto error;
+    }
+
+    SStrToken tagKey = {.z = line.z + start, .n = pos-start};
+    setItemKey(&item, tagKey, LP_TAG_KEY);
+
+    start = pos + 1;
+    err = scanToCommaOrSpace(line, start, &pos, LP_TAG_VALUE);
+    if (err != 0) {
+      tscError("c");
+      goto error;
+    }
+
+    SStrToken tagValue = {.z = line.z + start, .n = pos-start};
+    setItemValue(&item, tagValue, LP_TAG_VALUE);
+
+    parseItemValue(&item, LP_ITEM_TAG);
+    taosArrayPush(point->tags, &item);
+
+    start = pos;
+  }
+
+  taosArraySort(point->tags, compareLPItemKey);
+
+  point->fields = taosArrayInit(64, sizeof(SLPItem));
+
+  start++;
+  do {
+    SLPItem item;
+
+    err = scanToEqual(line, start, &pos);
+    if (err != 0) {
+      goto error;
+    }
+    SStrToken fieldKey = {.z = line.z + start, .n = pos- start};
+    setItemKey(&item, fieldKey, LP_FIELD_KEY);
+
+    start = pos + 1;
+    err = scanToCommaOrSpace(line, start, &pos, LP_FIELD_VALUE);
+    if (err != 0) {
+      goto error;
+    }
+    SStrToken fieldValue = {.z = line.z + start, .n = pos - start};
+    setItemValue(&item, fieldValue, LP_TAG_VALUE);
+
+    parseItemValue(&item, LP_ITEM_FIELD);
+    taosArrayPush(point->fields, &item);
+
+    start = pos + 1;
+  } while (line.z[pos] == ',');
+
+  taosArraySort(point->fields, compareLPItemKey);
+
+  SStrToken tsToken = {.z = line.z+start, .n = line.n-start};
+  setPointTimeStamp(point, tsToken);
+  parsePointTime(point);
+
+  goto done;
+
+  error:
+  // free array
+  return err;
+  done:
+  return 0;
+}
+
+
+int32_t tscParseLines(char* lines[], int numLines, SArray* points, SArray* failedLines) {
+  for (int32_t i = 0; i < numLines; ++i) {
+    SStrToken tkLine = {.z = lines[i], .n = (uint32_t)strlen(lines[i])};
+    SLPPoint point;
+    tscParseLine(tkLine, &point);
+    taosArrayPush(points, &point);
+  }
+  return 0;
+}
+
+void destroyLPPoint(void* p) {
+  SLPPoint* lpPoint = p;
+  for (int i=0; i<taosArrayGetSize(lpPoint->fields); ++i) {
+    SLPItem* item = taosArrayGet(lpPoint->fields, i);
+    free(item->value);
+  }
+  taosArrayDestroy(lpPoint->fields);
+
+  for (int i=0; i<taosArrayGetSize(lpPoint->tags); ++i) {
+    SLPItem* item = taosArrayGet(lpPoint->tags, i);
+    free(item->value);
+  }
+  taosArrayDestroy(lpPoint->tags);
+}
+
+void destroySmlDataPoint(TAOS_SML_DATA_POINT* point) {
+  for (int i=0; i<point->tagNum; ++i) {
+    free((point->tags+i)->key);
+    free((point->tags+i)->value);
+  }
+  free(point->tags);
+  for (int i=0; i<point->fieldNum; ++i) {
+    free((point->fields+i)->key);
+    free((point->fields+i)->value);
+  }
+  free(point->fields);
+  free(point->stableName);
+  free(point->childTableName);
+}
+
+int taos_insert_lines(TAOS* taos, char* lines[], int numLines) {
+  SArray* lpPoints = taosArrayInit(numLines, sizeof(SLPPoint));
+  tscParseLines(lines, numLines, lpPoints, NULL);
+
+  size_t numPoints = taosArrayGetSize(lpPoints);
+  TAOS_SML_DATA_POINT* points = calloc(numPoints, sizeof(TAOS_SML_DATA_POINT));
+  for (int i = 0; i < numPoints; ++i) {
+    SLPPoint* lpPoint = taosArrayGet(lpPoints, i);
+    TAOS_SML_DATA_POINT* point = points+i;
+    point->stableName = calloc(1, strlen(lpPoint->sTableName)+1);
+    strncpy(point->stableName, lpPoint->sTableName, strlen(lpPoint->sTableName));
+    point->stableName[strlen(lpPoint->sTableName)] = '\0';
+
+    size_t lpTagSize = taosArrayGetSize(lpPoint->tags);
+    point->tags = calloc(lpTagSize, sizeof(TAOS_SML_KV));
+    point->tagNum = (int)lpTagSize;
+    for (int j=0; j<lpTagSize; ++j) {
+      SLPItem* lpTag = taosArrayGet(lpPoint->tags, j);
+      TAOS_SML_KV* tagKv = point->tags + j;
+
+      size_t kenLen = strlen(lpTag->key);
+      tagKv->key = calloc(1, kenLen+1);
+      strncpy(tagKv->key, lpTag->key, kenLen);
+      tagKv->key[kenLen] = '\0';
+
+      tagKv->type = lpTag->type;
+      tagKv->length = lpTag->length;
+      tagKv->value = malloc(tagKv->length);
+      memcpy(tagKv->value, lpTag->value, tagKv->length);
+    }
+
+    size_t lpFieldsSize = taosArrayGetSize(lpPoint->fields);
+    point->fields = calloc(lpFieldsSize + 1, sizeof(TAOS_SML_KV));
+    point->fieldNum = (int)(lpFieldsSize + 1);
+
+    TAOS_SML_KV* tsField = point->fields + 0;
+    char tsKey[256];
+    snprintf(tsKey, 256, "_%s_ts", point->stableName);
+    size_t tsKeyLen = strlen(tsKey);
+    tsField->key = calloc(1, tsKeyLen+1);
+    strncpy(tsField->key, tsKey, tsKeyLen);
+    tsField->key[tsKeyLen] = '\0';
+    tsField->type = TSDB_DATA_TYPE_TIMESTAMP;
+    tsField->length = tDataTypes[TSDB_DATA_TYPE_TIMESTAMP].bytes;
+    tsField->value = malloc(tsField->length);
+    memcpy(tsField->value, &(lpPoint->ts), tsField->length);
+
+    for (int j=0; j<lpFieldsSize; ++j) {
+      SLPItem* lpField = taosArrayGet(lpPoint->fields, j);
+      TAOS_SML_KV* fieldKv = point->fields + j + 1;
+
+      size_t kenLen = strlen(lpField->key);
+      fieldKv->key = calloc(1, kenLen+1);
+      strncpy(fieldKv->key, lpField->key, kenLen);
+      fieldKv->key[kenLen] = '\0';
+
+      fieldKv->type = lpField->type;
+      fieldKv->length = lpField->length;
+      fieldKv->value = malloc(fieldKv->length);
+      memcpy(fieldKv->value, lpField->value, fieldKv->length);
+    }
+  }
+
+  taos_sml_insert(taos, points, (int)numPoints);
+
+  for (int i=0; i<numPoints; ++i) {
+    destroySmlDataPoint(points+i);
+  }
+  free(points);
+  taosArrayDestroyEx(lpPoints, destroyLPPoint);
+  return 0;
+}
+

src/client/src/tscPrepare.c

@@ -1200,9 +1200,11 @@ static int insertBatchStmtExecute(STscStmt* pStmt) {
   // wait for the callback function to post the semaphore
   tsem_wait(&pStmt->pSql->rspSem);
 
+  code = pStmt->pSql->res.code;
+  
   insertBatchClean(pStmt);
 
-  return pStmt->pSql->res.code;
+  return code;
 }
 
 int stmtParseInsertTbTags(SSqlObj* pSql, STscStmt* pStmt) {
@@ -1470,6 +1472,7 @@ int taos_stmt_prepare(TAOS_STMT* stmt, const char* sql, unsigned long length) {
   pSql->fetchFp    = waitForQueryRsp;
   
   pCmd->insertParam.insertType = TSDB_QUERY_TYPE_STMT_INSERT;
+  pCmd->insertParam.objectId = pSql->self;
 
   pSql->sqlstr = realloc(pSql->sqlstr, sqlLen + 1);
 
@@ -1646,7 +1649,11 @@ int taos_stmt_close(TAOS_STMT* stmt) {
   } else {
     if (pStmt->multiTbInsert) {
       taosHashCleanup(pStmt->mtb.pTableHash);
-      pStmt->mtb.pTableBlockHashList = tscDestroyBlockHashTable(pStmt->mtb.pTableBlockHashList, false);
+      bool rmMeta = false;
+      if (pStmt->pSql && pStmt->pSql->res.code != 0) {
+        rmMeta = true;
+      }
+      pStmt->mtb.pTableBlockHashList = tscDestroyBlockHashTable(pStmt->mtb.pTableBlockHashList, rmMeta);
       taosHashCleanup(pStmt->pSql->cmd.insertParam.pTableBlockHashList);
       pStmt->pSql->cmd.insertParam.pTableBlockHashList = NULL;
       taosArrayDestroy(pStmt->mtb.tags);

src/client/src/tscSQLParser.c

@@ -98,7 +98,7 @@ static int32_t parseIntervalOffset(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, SStrTo
 static int32_t parseSlidingClause(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, SStrToken* pSliding);
 static int32_t validateStateWindowNode(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, SSqlNode* pSqlNode, bool isStable);
 
-static int32_t addProjectionExprAndResultField(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, tSqlExprItem* pItem);
+static int32_t addProjectionExprAndResultField(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, tSqlExprItem* pItem, bool outerQuery);
 
 static int32_t validateWhereNode(SQueryInfo* pQueryInfo, tSqlExpr** pExpr, SSqlObj* pSql);
 static int32_t validateFillNode(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, SSqlNode* pSqlNode);
@@ -2023,8 +2023,8 @@ static SUdfInfo* isValidUdf(SArray* pUdfInfo, const char* name, int32_t len) {
   return NULL;
 }
 
-int32_t validateSelectNodeList(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, SArray* pSelNodeList, bool isSTable, bool joinQuery,
-                               bool timeWindowQuery) {
+int32_t validateSelectNodeList(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, SArray* pSelNodeList, bool joinQuery,
+                               bool timeWindowQuery, bool outerQuery) {
   assert(pSelNodeList != NULL && pCmd != NULL);
 
   const char* msg1 = "too many items in selection clause";
@@ -2072,7 +2072,7 @@ int32_t validateSelectNodeList(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, SArray* pS
     } else if (type == SQL_NODE_TABLE_COLUMN || type == SQL_NODE_VALUE) {
       // use the dynamic array list to decide if the function is valid or not
       // select table_name1.field_name1, table_name2.field_name2  from table_name1, table_name2
-      if (addProjectionExprAndResultField(pCmd, pQueryInfo, pItem) != TSDB_CODE_SUCCESS) {
+      if (addProjectionExprAndResultField(pCmd, pQueryInfo, pItem, outerQuery) != TSDB_CODE_SUCCESS) {
         return TSDB_CODE_TSC_INVALID_OPERATION;
       }
     } else if (type == SQL_NODE_EXPR) {
@@ -2208,14 +2208,15 @@ static int32_t doAddProjectionExprAndResultFields(SQueryInfo* pQueryInfo, SColum
   return numOfTotalColumns;
 }
 
-int32_t addProjectionExprAndResultField(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, tSqlExprItem* pItem) {
+int32_t addProjectionExprAndResultField(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, tSqlExprItem* pItem, bool outerQuery) {
   const char* msg1 = "tag for normal table query is not allowed";
   const char* msg2 = "invalid column name";
+  const char* msg3 = "tbname not allowed in outer query";
 
   int32_t startPos = (int32_t)tscNumOfExprs(pQueryInfo);
-  int32_t optr = pItem->pNode->tokenId;
+  int32_t tokenId = pItem->pNode->tokenId;
 
-  if (optr == TK_ALL) {  // project on all fields
+  if (tokenId == TK_ALL) {  // project on all fields
     TSDB_QUERY_SET_TYPE(pQueryInfo->type, TSDB_QUERY_TYPE_PROJECTION_QUERY);
 
     SColumnIndex index = COLUMN_INDEX_INITIALIZER;
@@ -2239,7 +2240,7 @@ int32_t addProjectionExprAndResultField(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, t
     if (pTableMeta->tableType != TSDB_TEMP_TABLE) {
       tscInsertPrimaryTsSourceColumn(pQueryInfo, pTableMeta->id.uid);
     }
-  } else if (optr == TK_STRING || optr == TK_INTEGER || optr == TK_FLOAT) {  // simple column projection query
+  } else if (tokenId == TK_STRING || tokenId == TK_INTEGER || tokenId == TK_FLOAT) {  // simple column projection query
     SColumnIndex index = COLUMN_INDEX_INITIALIZER;
 
     // user-specified constant value as a new result column
@@ -2247,13 +2248,13 @@ int32_t addProjectionExprAndResultField(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, t
     index.tableIndex = 0;
 
     SSchema colSchema = tGetUserSpecifiedColumnSchema(&pItem->pNode->value, &pItem->pNode->exprToken, pItem->aliasName);
-    SExprInfo* pExpr =
-        tscAddFuncInSelectClause(pQueryInfo, startPos, TSDB_FUNC_PRJ, &index, &colSchema, TSDB_COL_UDC, getNewResColId(pCmd));
+    SExprInfo* pExpr = tscAddFuncInSelectClause(pQueryInfo, startPos, TSDB_FUNC_PRJ, &index, &colSchema, TSDB_COL_UDC,
+                                                getNewResColId(pCmd));
 
     // NOTE: the first parameter is reserved for the tag column id during join query process.
     pExpr->base.numOfParams = 2;
     tVariantAssign(&pExpr->base.param[1], &pItem->pNode->value);
-  } else if (optr == TK_ID) {
+  } else if (tokenId == TK_ID) {
     SColumnIndex index = COLUMN_INDEX_INITIALIZER;
 
     if (getColumnIndexByName(&pItem->pNode->columnName, pQueryInfo, &index, tscGetErrorMsgPayload(pCmd)) != TSDB_CODE_SUCCESS) {
@@ -2261,12 +2262,40 @@ int32_t addProjectionExprAndResultField(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, t
     }
 
     if (index.columnIndex == TSDB_TBNAME_COLUMN_INDEX) {
+      if (outerQuery) {
+        STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, index.tableIndex);
+        int32_t         numOfCols = tscGetNumOfColumns(pTableMetaInfo->pTableMeta);
+
+        bool existed = false;
+        SSchema* pSchema = pTableMetaInfo->pTableMeta->schema;
+        for (int32_t i = 0; i < numOfCols; ++i) {
+          if (strncasecmp(pSchema[i].name, TSQL_TBNAME_L, tListLen(pSchema[i].name)) == 0) {
+            existed = true;
+            index.columnIndex = i;
+            break;
+          }
+        }
+
+        if (!existed) {
+          return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg3);
+        }
+
+        SSchema colSchema = pSchema[index.columnIndex];
+        char    name[TSDB_COL_NAME_LEN] = {0};
+        getColumnName(pItem, name, colSchema.name, sizeof(colSchema.name) - 1);
+
+        tstrncpy(colSchema.name, name, TSDB_COL_NAME_LEN);
+        /*SExprInfo* pExpr = */ tscAddFuncInSelectClause(pQueryInfo, startPos, TSDB_FUNC_PRJ, &index, &colSchema,
+                                                         TSDB_COL_NORMAL, getNewResColId(pCmd));
+      } else {
         SSchema colSchema = *tGetTbnameColumnSchema();
         char    name[TSDB_COL_NAME_LEN] = {0};
         getColumnName(pItem, name, colSchema.name, sizeof(colSchema.name) - 1);
 
         tstrncpy(colSchema.name, name, TSDB_COL_NAME_LEN);
-      /*SExprInfo* pExpr = */tscAddFuncInSelectClause(pQueryInfo, startPos, TSDB_FUNC_TAGPRJ, &index, &colSchema, TSDB_COL_TAG, getNewResColId(pCmd));
+        /*SExprInfo* pExpr = */ tscAddFuncInSelectClause(pQueryInfo, startPos, TSDB_FUNC_TAGPRJ, &index, &colSchema,
+                                                         TSDB_COL_TAG, getNewResColId(pCmd));
+      }
     } else {
       STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, index.tableIndex);
       STableMeta*     pTableMeta = pTableMetaInfo->pTableMeta;
@@ -7501,8 +7530,7 @@ int32_t doCheckForStream(SSqlObj* pSql, SSqlInfo* pInfo) {
     return code;
   }
 
-  bool isSTable = UTIL_TABLE_IS_SUPER_TABLE(pTableMetaInfo);
-  if (validateSelectNodeList(&pSql->cmd, pQueryInfo, pSqlNode->pSelNodeList, isSTable, false, false) != TSDB_CODE_SUCCESS) {
+  if (validateSelectNodeList(&pSql->cmd, pQueryInfo, pSqlNode->pSelNodeList, false, false, false) != TSDB_CODE_SUCCESS) {
     return TSDB_CODE_TSC_INVALID_OPERATION;
   }
 
@@ -8331,7 +8359,7 @@ int32_t validateSqlNode(SSqlObj* pSql, SSqlNode* pSqlNode, SQueryInfo* pQueryInf
       return TSDB_CODE_TSC_INVALID_OPERATION;
     }
 
-    if (validateSelectNodeList(pCmd, pQueryInfo, pSqlNode->pSelNodeList, false, false, timeWindowQuery) !=
+    if (validateSelectNodeList(pCmd, pQueryInfo, pSqlNode->pSelNodeList, false, timeWindowQuery, true) !=
         TSDB_CODE_SUCCESS) {
       return TSDB_CODE_TSC_INVALID_OPERATION;
     }
@@ -8471,7 +8499,7 @@ int32_t validateSqlNode(SSqlObj* pSql, SSqlNode* pSqlNode, SQueryInfo* pQueryInf
     int32_t timeWindowQuery =
         (TPARSER_HAS_TOKEN(pSqlNode->interval.interval) || TPARSER_HAS_TOKEN(pSqlNode->sessionVal.gap));
 
-    if (validateSelectNodeList(pCmd, pQueryInfo, pSqlNode->pSelNodeList, isSTable, joinQuery, timeWindowQuery) !=
+    if (validateSelectNodeList(pCmd, pQueryInfo, pSqlNode->pSelNodeList, joinQuery, timeWindowQuery, false) !=
         TSDB_CODE_SUCCESS) {
       return TSDB_CODE_TSC_INVALID_OPERATION;
     }

src/client/src/tscSubquery.c

@@ -2544,7 +2544,7 @@ int32_t tscHandleMasterSTableQuery(SSqlObj *pSql) {
     SSqlObj* pSub = pSql->pSubs[j];
     SRetrieveSupport* pSupport = pSub->param;
     
-    tscDebug("0x%"PRIx64" sub:%p launch subquery, orderOfSub:%d.", pSql->self, pSub, pSupport->subqueryIndex);
+    tscDebug("0x%"PRIx64" sub:0x%"PRIx64" launch subquery, orderOfSub:%d.", pSql->self, pSub->self, pSupport->subqueryIndex);
     tscBuildAndSendRequest(pSub, NULL);
   }
 
@@ -2885,8 +2885,8 @@ static void tscRetrieveFromDnodeCallBack(void *param, TAOS_RES *tres, int numOfR
     assert(pRes->numOfRows == numOfRows);
     int64_t num = atomic_add_fetch_64(&pState->numOfRetrievedRows, numOfRows);
     
-    tscDebug("0x%"PRIx64" sub:%p retrieve numOfRows:%d totalNumOfRows:%" PRIu64 " from ep:%s, orderOfSub:%d",
-        pParentSql->self, pSql, pRes->numOfRows, pState->numOfRetrievedRows, pSql->epSet.fqdn[pSql->epSet.inUse], idx);
+    tscDebug("0x%"PRIx64" sub:0x%"PRIx64" retrieve numOfRows:%d totalNumOfRows:%" PRIu64 " from ep:%s, orderOfSub:%d",
+        pParentSql->self, pSql->self, pRes->numOfRows, pState->numOfRetrievedRows, pSql->epSet.fqdn[pSql->epSet.inUse], idx);
 
     if (num > tsMaxNumOfOrderedResults && tscIsProjectionQueryOnSTable(pQueryInfo, 0) && !(tscGetQueryInfo(&pParentSql->cmd)->distinctTag)) {
       tscError("0x%"PRIx64" sub:0x%"PRIx64" num of OrderedRes is too many, max allowed:%" PRId32 " , current:%" PRId64,

src/client/src/tscUtil.c

@@ -3434,6 +3434,7 @@ SSqlObj* createSubqueryObj(SSqlObj* pSql, int16_t tableIndex, __async_cb_func_t
   pnCmd->insertParam.numOfTables = 0;
   pnCmd->insertParam.pTableNameList = NULL;
   pnCmd->insertParam.pTableBlockHashList = NULL;
+  pnCmd->insertParam.objectId = pNew->self;
 
   memset(&pnCmd->insertParam.tagData, 0, sizeof(STagData));
 
@@ -3707,6 +3708,7 @@ void executeQuery(SSqlObj* pSql, SQueryInfo* pQueryInfo) {
       pNew->signature = pNew;
       pNew->sqlstr = strdup(pSql->sqlstr);  // todo refactor
       pNew->fp = tscSubqueryCompleteCallback;
+      tsem_init(&pNew->rspSem, 0, 0);
 
       SRetrieveSupport* ps = calloc(1, sizeof(SRetrieveSupport));  // todo use object id
       ps->pParentSql = pSql;

src/connector/jdbc/src/main/java/com/taosdata/jdbc/utils/Utils.java

@@ -110,7 +110,7 @@ public class Utils {
             return rawSql;
         // toLowerCase
         String preparedSql = rawSql.trim().toLowerCase();
-        String[] clause = new String[]{"values\\s*\\(.*?\\)", "tags\\s*\\(.*?\\)", "where\\s*.*"};
+        String[] clause = new String[]{"values\\s*\\([\\s\\S]*?\\)", "tags\\s*\\([\\s\\S]*?\\)", "where[\\s\\S]*"};
         Map<Integer, Integer> placeholderPositions = new HashMap<>();
         RangeSet<Integer> clauseRangeSet = TreeRangeSet.create();
         findPlaceholderPosition(preparedSql, placeholderPositions);

src/inc/taos.h

@@ -169,6 +169,8 @@ DLL_EXPORT void taos_close_stream(TAOS_STREAM *tstr);
 
 DLL_EXPORT int taos_load_table_info(TAOS *taos, const char* tableNameList);
 
+DLL_EXPORT int taos_insert_lines(TAOS* taos, char* lines[], int numLines);
+
 #ifdef __cplusplus
 }
 #endif

src/kit/taosdemo/taosdemo.c

@@ -75,7 +75,7 @@ enum TEST_MODE {
 
 #define MAX_RECORDS_PER_REQ     32766
 
-#define HEAD_BUFF_LEN    1024*24  // 16*1024 + (192+32)*2 + insert into ..
+#define HEAD_BUFF_LEN       TSDB_MAX_COLUMNS*24  // 16*MAX_COLUMNS + (192+32)*2 + insert into ..
 
 #define MAX_SQL_SIZE       65536
 #define BUFFER_SIZE        (65536*2)
@@ -84,20 +84,17 @@ enum TEST_MODE {
 #define MAX_PASSWORD_SIZE  64
 #define MAX_HOSTNAME_SIZE  64
 #define MAX_TB_NAME_SIZE   64
-#define MAX_DATA_SIZE      (16*1024)+20     // max record len: 16*1024, timestamp string and ,('') need extra space
-#define MAX_NUM_DATATYPE   10
+#define MAX_DATA_SIZE      (16*TSDB_MAX_COLUMNS)+20     // max record len: 16*MAX_COLUMNS, timestamp string and ,('') need extra space
 #define OPT_ABORT          1 /* –abort */
 #define STRING_LEN         60000
 #define MAX_PREPARED_RAND  1000000
 #define MAX_FILE_NAME_LEN  256              // max file name length on linux is 255.
 
 #define MAX_SAMPLES_ONCE_FROM_FILE   10000
-#define   MAX_NUM_DATATYPE 10
+#define MAX_NUM_COLUMNS        (TSDB_MAX_COLUMNS - 1)      // exclude first column timestamp
 
 #define MAX_DB_COUNT            8
 #define MAX_SUPER_TABLE_COUNT   200
-#define   MAX_COLUMN_COUNT       1024
-#define   MAX_TAG_COUNT          128
 
 #define MAX_QUERY_SQL_COUNT     100
 #define MAX_QUERY_SQL_LENGTH    1024
@@ -218,7 +215,7 @@ typedef struct SArguments_S {
     bool     performance_print;
     char *   output_file;
     bool     async_mode;
-    char *   datatype[MAX_NUM_DATATYPE + 1];
+    char *   datatype[MAX_NUM_COLUMNS + 1];
     uint32_t len_of_binary;
     uint32_t num_of_CPR;
     uint32_t num_of_threads;
@@ -274,9 +271,9 @@ typedef struct SSuperTable_S {
   char         tagsFile[MAX_FILE_NAME_LEN];
 
   uint32_t     columnCount;
-  StrColumn    columns[MAX_COLUMN_COUNT];
+  StrColumn    columns[TSDB_MAX_COLUMNS];
   uint32_t     tagCount;
-  StrColumn    tags[MAX_TAG_COUNT];
+  StrColumn    tags[TSDB_MAX_TAGS];
 
   char*        childTblName;
   char*        colsOfCreateChildTable;
@@ -565,6 +562,8 @@ double   randdouble[MAX_PREPARED_RAND];
 char *aggreFunc[] = {"*", "count(*)", "avg(col0)", "sum(col0)",
     "max(col0)", "min(col0)", "first(col0)", "last(col0)"};
 
+#define DEFAULT_DATATYPE_NUM    3
+
 SArguments g_args = {
     NULL,            // metaFile
     0,               // test_mode
@@ -595,7 +594,7 @@ SArguments g_args = {
     {
         "FLOAT",         // datatype
         "INT",           // datatype
-        "FLOAT",         // datatype
+        "FLOAT",         // datatype. DEFAULT_DATATYPE_NUM is 3
     },
     16,              // len_of_binary
     4,               // num_of_CPR
@@ -725,9 +724,13 @@ static void printHelp() {
             "The data_type of columns, default: FLOAT, INT, FLOAT.");
     printf("%s%s%s%s\n", indent, "-w", indent,
             "The length of data_type 'BINARY' or 'NCHAR'. Default is 16");
-    printf("%s%s%s%s%d\n", indent, "-l", indent,
-            "The number of columns per record. Default is 3. Max values is ",
-            MAX_NUM_DATATYPE);
+    printf("%s%s%s%s%d%s%d\n", indent, "-l", indent,
+            "The number of columns per record. Default is ",
+            DEFAULT_DATATYPE_NUM,
+            ". Max values is ",
+            MAX_NUM_COLUMNS);
+    printf("%s%s%s%s\n", indent, indent, indent,
+            "All of the new column(s) type is INT. If use -b to specify column type, -l will be ignored.");
     printf("%s%s%s%s\n", indent, "-T", indent,
             "The number of threads. Default is 10.");
     printf("%s%s%s%s\n", indent, "-i", indent,
@@ -931,13 +934,16 @@ static void parse_args(int argc, char *argv[], SArguments *arguments) {
             }
             arguments->num_of_CPR = atoi(argv[++i]);
 
-            if (arguments->num_of_CPR > MAX_NUM_DATATYPE) {
-                printf("WARNING: max acceptible columns count is %d\n", MAX_NUM_DATATYPE);
+            if (arguments->num_of_CPR > MAX_NUM_COLUMNS) {
+                printf("WARNING: max acceptible columns count is %d\n", MAX_NUM_COLUMNS);
                 prompt();
-                arguments->num_of_CPR = MAX_NUM_DATATYPE;
+                arguments->num_of_CPR = MAX_NUM_COLUMNS;
             }
 
-            for (int col = arguments->num_of_CPR; col < MAX_NUM_DATATYPE; col++) {
+            for (int col = DEFAULT_DATATYPE_NUM; col < arguments->num_of_CPR; col ++) {
+                arguments->datatype[col] = "INT";
+            }
+            for (int col = arguments->num_of_CPR; col < MAX_NUM_COLUMNS; col++) {
                 arguments->datatype[col] = NULL;
             }
 
@@ -990,7 +996,7 @@ static void parse_args(int argc, char *argv[], SArguments *arguments) {
                     }
                     arguments->datatype[index++] = token;
                     token = strsep(&running, ",");
-                    if (index >= MAX_NUM_DATATYPE) break;
+                    if (index >= MAX_NUM_COLUMNS) break;
                 }
                 arguments->datatype[index] = NULL;
             }
@@ -1086,7 +1092,7 @@ static void parse_args(int argc, char *argv[], SArguments *arguments) {
     }
 
     int columnCount;
-    for (columnCount = 0; columnCount < MAX_NUM_DATATYPE; columnCount ++) {
+    for (columnCount = 0; columnCount < MAX_NUM_COLUMNS; columnCount ++) {
         if (g_args.datatype[columnCount] == NULL) {
             break;
         }
@@ -1111,7 +1117,7 @@ static void parse_args(int argc, char *argv[], SArguments *arguments) {
                 arguments->use_metric ? "true" : "false");
         if (*(arguments->datatype)) {
             printf("# Specified data type:               ");
-            for (int i = 0; i < MAX_NUM_DATATYPE; i++)
+            for (int i = 0; i < MAX_NUM_COLUMNS; i++)
                 if (arguments->datatype[i])
                     printf("%s,", arguments->datatype[i]);
                 else
@@ -2389,8 +2395,15 @@ static char* generateTagVaulesForStb(SSuperTable* stbInfo, int32_t tableSeq) {
             tmfree(buf);
         } else if (0 == strncasecmp(stbInfo->tags[i].dataType,
                     "int", strlen("int"))) {
-            dataLen += snprintf(dataBuf + dataLen, TSDB_MAX_SQL_LEN - dataLen,
+            if ((g_args.demo_mode) && (i == 0)) {
+                dataLen += snprintf(dataBuf + dataLen,
+                        TSDB_MAX_SQL_LEN - dataLen,
+                    "%d, ", tableSeq % 10);
+            } else {
+                dataLen += snprintf(dataBuf + dataLen,
+                        TSDB_MAX_SQL_LEN - dataLen,
                     "%d, ", tableSeq);
+            }
         } else if (0 == strncasecmp(stbInfo->tags[i].dataType,
                     "bigint", strlen("bigint"))) {
             dataLen += snprintf(dataBuf + dataLen, TSDB_MAX_SQL_LEN - dataLen,
@@ -2787,16 +2800,26 @@ static int createSuperTable(
         char* dataType = superTbl->tags[tagIndex].dataType;
 
         if (strcasecmp(dataType, "BINARY") == 0) {
-            len += snprintf(tags + len, STRING_LEN - len, "t%d %s(%d), ", tagIndex,
-                    "BINARY", superTbl->tags[tagIndex].dataLen);
+            if ((g_args.demo_mode) && (tagIndex == 1)) {
+                len += snprintf(tags + len, STRING_LEN - len,
+                        "loction BINARY(%d), ",
+                        superTbl->tags[tagIndex].dataLen);
+            } else {
+                len += snprintf(tags + len, STRING_LEN - len, "t%d %s(%d), ",
+                        tagIndex, "BINARY", superTbl->tags[tagIndex].dataLen);
+            }
             lenOfTagOfOneRow += superTbl->tags[tagIndex].dataLen + 3;
         } else if (strcasecmp(dataType, "NCHAR") == 0) {
             len += snprintf(tags + len, STRING_LEN - len, "t%d %s(%d), ", tagIndex,
                     "NCHAR", superTbl->tags[tagIndex].dataLen);
             lenOfTagOfOneRow += superTbl->tags[tagIndex].dataLen + 3;
         } else if (strcasecmp(dataType, "INT") == 0)  {
+            if ((g_args.demo_mode) && (tagIndex == 0)) {
+                len += snprintf(tags + len, STRING_LEN - len, "groupId INT, ");
+            } else {
                 len += snprintf(tags + len, STRING_LEN - len, "t%d %s, ", tagIndex,
                     "INT");
+            }
             lenOfTagOfOneRow += superTbl->tags[tagIndex].dataLen + 11;
         } else if (strcasecmp(dataType, "BIGINT") == 0)  {
             len += snprintf(tags + len, STRING_LEN - len, "t%d %s, ", tagIndex,
@@ -3352,9 +3375,9 @@ static bool getColumnAndTagTypeFromInsertJsonFile(
   }
 
   int columnSize = cJSON_GetArraySize(columns);
-  if ((columnSize + 1/* ts */) > MAX_COLUMN_COUNT) {
+  if ((columnSize + 1/* ts */) > TSDB_MAX_COLUMNS) {
     errorPrint("%s() LN%d, failed to read json, column size overflow, max column size is %d\n",
-            __func__, __LINE__, MAX_COLUMN_COUNT);
+            __func__, __LINE__, TSDB_MAX_COLUMNS);
     goto PARSE_OVER;
   }
 
@@ -3410,9 +3433,9 @@ static bool getColumnAndTagTypeFromInsertJsonFile(
     }
   }
 
-  if ((index + 1 /* ts */) > MAX_COLUMN_COUNT) {
+  if ((index + 1 /* ts */) > MAX_NUM_COLUMNS) {
     errorPrint("%s() LN%d, failed to read json, column size overflow, allowed max column size is %d\n",
-            __func__, __LINE__, MAX_COLUMN_COUNT);
+            __func__, __LINE__, MAX_NUM_COLUMNS);
     goto PARSE_OVER;
   }
 
@@ -3429,9 +3452,9 @@ static bool getColumnAndTagTypeFromInsertJsonFile(
   }
 
   int tagSize = cJSON_GetArraySize(tags);
-  if (tagSize > MAX_TAG_COUNT) {
+  if (tagSize > TSDB_MAX_TAGS) {
     errorPrint("%s() LN%d, failed to read json, tags size overflow, max tag size is %d\n",
-        __func__, __LINE__, MAX_TAG_COUNT);
+        __func__, __LINE__, TSDB_MAX_TAGS);
     goto PARSE_OVER;
   }
 
@@ -3481,17 +3504,17 @@ static bool getColumnAndTagTypeFromInsertJsonFile(
     }
   }
 
-  if (index > MAX_TAG_COUNT) {
+  if (index > TSDB_MAX_TAGS) {
     errorPrint("%s() LN%d, failed to read json, tags size overflow, allowed max tag count is %d\n",
-        __func__, __LINE__, MAX_TAG_COUNT);
+        __func__, __LINE__, TSDB_MAX_TAGS);
     goto PARSE_OVER;
   }
 
   superTbls->tagCount = index;
 
-  if ((superTbls->columnCount + superTbls->tagCount + 1 /* ts */) > MAX_COLUMN_COUNT) {
+  if ((superTbls->columnCount + superTbls->tagCount + 1 /* ts */) > TSDB_MAX_COLUMNS) {
     errorPrint("%s() LN%d, columns + tags is more than allowed max columns count: %d\n",
-        __func__, __LINE__, MAX_COLUMN_COUNT);
+        __func__, __LINE__, TSDB_MAX_COLUMNS);
     goto PARSE_OVER;
   }
   ret = true;
@@ -7919,7 +7942,7 @@ static void setParaFromArg(){
     g_Dbs.db[0].superTbls[0].maxSqlLen = g_args.max_sql_len;
 
     g_Dbs.db[0].superTbls[0].columnCount = 0;
-    for (int i = 0; i < MAX_NUM_DATATYPE; i++) {
+    for (int i = 0; i < MAX_NUM_COLUMNS; i++) {
       if (data_type[i] == NULL) {
         break;
       }

src/query/src/qAggMain.c

@@ -1786,6 +1786,49 @@ static void valuePairAssign(tValuePair *dst, int16_t type, const char *val, int6
     memcpy((dst)->pTags, (src)->pTags, (size_t)(__l)); \
   } while (0)
 
+static int32_t topBotComparFn(const void *p1, const void *p2, const void *param)
+{
+  uint16_t     type = *(uint16_t *) param;
+  tValuePair  *val1 = *(tValuePair **) p1;
+  tValuePair  *val2 = *(tValuePair **) p2;
+
+  if (IS_SIGNED_NUMERIC_TYPE(type)) {
+    if (val1->v.i64 == val2->v.i64) {
+      return 0;
+    }
+
+    return (val1->v.i64 > val2->v.i64) ? 1 : -1;
+   } else if (IS_UNSIGNED_NUMERIC_TYPE(type)) {
+     if (val1->v.u64 == val2->v.u64) {
+       return 0;
+     }
+
+     return (val1->v.u64 > val2->v.u64) ? 1 : -1;
+  }
+
+  if (val1->v.dKey == val2->v.dKey) {
+    return 0;
+  }
+
+  return (val1->v.dKey > val2->v.dKey) ? 1 : -1;
+}
+
+static void topBotSwapFn(void *dst, void *src, const void *param)
+{
+  char         tag[32768];
+  tValuePair   temp;
+  uint16_t     tagLen = *(uint16_t *) param;
+  tValuePair  *vdst = *(tValuePair **) dst;
+  tValuePair  *vsrc = *(tValuePair **) src;
+
+  memset(tag, 0, sizeof(tag));
+  temp.pTags = tag;
+
+  VALUEPAIRASSIGN(&temp, vdst, tagLen);
+  VALUEPAIRASSIGN(vdst, vsrc, tagLen);
+  VALUEPAIRASSIGN(vsrc, &temp, tagLen);
+}
+
 static void do_top_function_add(STopBotInfo *pInfo, int32_t maxLen, void *pData, int64_t ts, uint16_t type,
                                 SExtTagsInfo *pTagInfo, char *pTags, int16_t stage) {
   tVariant val = {0};
@@ -1795,59 +1838,17 @@ static void do_top_function_add(STopBotInfo *pInfo, int32_t maxLen, void *pData,
   assert(pList != NULL);
 
   if (pInfo->num < maxLen) {
-    if (pInfo->num == 0 ||
-        (IS_SIGNED_NUMERIC_TYPE(type) && val.i64 >= pList[pInfo->num - 1]->v.i64) ||
-        (IS_UNSIGNED_NUMERIC_TYPE(type) && val.u64 >= pList[pInfo->num - 1]->v.u64) ||
-        (IS_FLOAT_TYPE(type) && val.dKey >= pList[pInfo->num - 1]->v.dKey)) {
-      valuePairAssign(pList[pInfo->num], type, (const char*)&val.i64, ts, pTags, pTagInfo, stage);
-    } else {
-      int32_t i = pInfo->num - 1;
-      if (IS_SIGNED_NUMERIC_TYPE(type)) {
-        while (i >= 0 && pList[i]->v.i64 > val.i64) {
-          VALUEPAIRASSIGN(pList[i + 1], pList[i], pTagInfo->tagsLen);
-          i -= 1;
-        }
-      } else if (IS_UNSIGNED_NUMERIC_TYPE(type)) {
-        while (i >= 0 && pList[i]->v.u64 > val.u64) {
-          VALUEPAIRASSIGN(pList[i + 1], pList[i], pTagInfo->tagsLen);
-          i -= 1;
-        }
-      } else {
-        while (i >= 0 && pList[i]->v.dKey > val.dKey) {
-          VALUEPAIRASSIGN(pList[i + 1], pList[i], pTagInfo->tagsLen);
-          i -= 1;
-        }
-      }
+    valuePairAssign(pList[pInfo->num], type, (const char *)&val.i64, ts, pTags, pTagInfo, stage);
 
-      valuePairAssign(pList[i + 1], type, (const char*) &val.i64, ts, pTags, pTagInfo, stage);
-    }
+    taosheapsort((void *) pList, sizeof(tValuePair **), pInfo->num + 1, (const void *) &type, topBotComparFn, (const void *) &pTagInfo->tagsLen, topBotSwapFn, 0);
  
     pInfo->num++;
   } else {
-    int32_t i = 0;
-
     if ((IS_SIGNED_NUMERIC_TYPE(type) && val.i64 > pList[0]->v.i64) ||
         (IS_UNSIGNED_NUMERIC_TYPE(type) && val.u64 > pList[0]->v.u64) ||
         (IS_FLOAT_TYPE(type) && val.dKey > pList[0]->v.dKey)) {
-      // find the appropriate the slot position
-      if (IS_SIGNED_NUMERIC_TYPE(type)) {
-        while (i + 1 < maxLen && pList[i + 1]->v.i64 < val.i64) {
-          VALUEPAIRASSIGN(pList[i], pList[i + 1], pTagInfo->tagsLen);
-          i += 1;
-        }
-      } if (IS_UNSIGNED_NUMERIC_TYPE(type)) {
-        while (i + 1 < maxLen && pList[i + 1]->v.u64 < val.u64) {
-          VALUEPAIRASSIGN(pList[i], pList[i + 1], pTagInfo->tagsLen);
-          i += 1;
-        }
-      } else {
-        while (i + 1 < maxLen && pList[i + 1]->v.dKey < val.dKey) {
-          VALUEPAIRASSIGN(pList[i], pList[i + 1], pTagInfo->tagsLen);
-          i += 1;
-        }
-      }
-
-      valuePairAssign(pList[i], type, (const char *)&val.i64, ts, pTags, pTagInfo, stage);
+      valuePairAssign(pList[0], type, (const char *)&val.i64, ts, pTags, pTagInfo, stage);
+      taosheapadjust((void *) pList, sizeof(tValuePair **), 0, maxLen - 1, (const void *) &type, topBotComparFn, (const void *) &pTagInfo->tagsLen, topBotSwapFn, 0);
     }
   }
 }
@@ -1861,57 +1862,17 @@ static void do_bottom_function_add(STopBotInfo *pInfo, int32_t maxLen, void *pDa
   assert(pList != NULL);
 
   if (pInfo->num < maxLen) {
-    if (pInfo->num == 0) {
-      valuePairAssign(pList[pInfo->num], type, (const char*) &val.i64, ts, pTags, pTagInfo, stage);
-    } else {
-      int32_t i = pInfo->num - 1;
-      
-      if (IS_SIGNED_NUMERIC_TYPE(type)) {
-        while (i >= 0 && pList[i]->v.i64 < val.i64) {
-          VALUEPAIRASSIGN(pList[i + 1], pList[i], pTagInfo->tagsLen);
-          i -= 1;
-        }
-      } else if (IS_UNSIGNED_NUMERIC_TYPE(type)) {
-          while (i >= 0 && pList[i]->v.u64 < val.u64) {
-            VALUEPAIRASSIGN(pList[i + 1], pList[i], pTagInfo->tagsLen);
-            i -= 1;
-          }
-      } else {
-        while (i >= 0 && pList[i]->v.dKey < val.dKey) {
-          VALUEPAIRASSIGN(pList[i + 1], pList[i], pTagInfo->tagsLen);
-          i -= 1;
-        }
-      }
+    valuePairAssign(pList[pInfo->num], type, (const char *)&val.i64, ts, pTags, pTagInfo, stage);
 
-      valuePairAssign(pList[i + 1], type, (const char*)&val.i64, ts, pTags, pTagInfo, stage);
-    }
+    taosheapsort((void *) pList, sizeof(tValuePair **), pInfo->num + 1, (const void *) &type, topBotComparFn, (const void *) &pTagInfo->tagsLen, topBotSwapFn, 1);
 
     pInfo->num++;
   } else {
-    int32_t i = 0;
-    
     if ((IS_SIGNED_NUMERIC_TYPE(type) && val.i64 < pList[0]->v.i64) ||
         (IS_UNSIGNED_NUMERIC_TYPE(type) && val.u64 < pList[0]->v.u64) ||
         (IS_FLOAT_TYPE(type) && val.dKey < pList[0]->v.dKey)) {
-      // find the appropriate the slot position
-      if (IS_SIGNED_NUMERIC_TYPE(type)) {
-        while (i + 1 < maxLen && pList[i + 1]->v.i64 > val.i64) {
-          VALUEPAIRASSIGN(pList[i], pList[i + 1], pTagInfo->tagsLen);
-          i += 1;
-        }
-      } if (IS_UNSIGNED_NUMERIC_TYPE(type)) {
-        while (i + 1 < maxLen && pList[i + 1]->v.u64 > val.u64) {
-          VALUEPAIRASSIGN(pList[i], pList[i + 1], pTagInfo->tagsLen);
-          i += 1;
-        }
-      } else {
-        while (i + 1 < maxLen && pList[i + 1]->v.dKey > val.dKey) {
-          VALUEPAIRASSIGN(pList[i], pList[i + 1], pTagInfo->tagsLen);
-          i += 1;
-        }
-      }
-      
-      valuePairAssign(pList[i], type, (const char*)&val.i64, ts, pTags, pTagInfo, stage);
+      valuePairAssign(pList[0], type, (const char *)&val.i64, ts, pTags, pTagInfo, stage);
+      taosheapadjust((void *) pList, sizeof(tValuePair **), 0, maxLen - 1, (const void *) &type, topBotComparFn, (const void *) &pTagInfo->tagsLen, topBotSwapFn, 1);
     }
   }
 }

src/util/inc/talgo.h

@@ -34,6 +34,7 @@ typedef int (*__compar_fn_t) (const void *, const void *);
 #define elePtrAt(base, size, idx) (void *)((char *)(base) + (size) * (idx))
 
 typedef int32_t (*__ext_compar_fn_t)(const void *p1, const void *p2, const void *param);
+typedef void (*__ext_swap_fn_t)(void *p1, void *p2, const void *param);
 
 /**
  * quick sort, with the compare function requiring additional parameters support
@@ -59,6 +60,38 @@ void taosqsort(void *src, size_t numOfElem, size_t size, const void* param, __ex
  */
 void *taosbsearch(const void *key, const void *base, size_t nmemb, size_t size, __compar_fn_t fn, int flags);
 
+/**
+ * adjust heap
+ *
+ * @param base: the start address of array
+ * @param size: size of every item in array
+ * @param start: the first index
+ * @param end: the last index
+ * @param parcompar: parameters for compare function
+ * @param compar: user defined compare function
+ * @param parswap: parameters for swap function
+ * @param swap: user defined swap function, the default swap function doswap will be used if swap is NULL
+ * @param maxroot: if heap is max root heap
+ * @return
+ */
+void taosheapadjust(void *base, int32_t size, int32_t start, int32_t end, const void *parcompar, __ext_compar_fn_t compar, const void *parswap, __ext_swap_fn_t swap, bool maxroot);
+
+/**
+ * sort heap to make sure it is a max/min root heap
+ *
+ * @param base: the start address of array
+ * @param size: size of every item in array
+ * @param len: the length of array
+ * @param parcompar: parameters for compare function
+ * @param compar: user defined compare function
+ * @param parswap: parameters for swap function
+ * @param swap: user defined swap function, the default swap function doswap will be used if swap is NULL
+ * @param maxroot: if heap is max root heap
+ * @return
+ */
+void taosheapsort(void *base, int32_t size, int32_t len, const void *parcompar, __ext_compar_fn_t compar, const void *parswap, __ext_swap_fn_t swap, bool maxroot);
+
+
 #ifdef __cplusplus
 }
 #endif

src/util/src/talgo.c

@@ -225,3 +225,89 @@ void * taosbsearch(const void *key, const void *base, size_t nmemb, size_t size,
   
   return NULL;
 }
+
+void taosheapadjust(void *base, int32_t size, int32_t start, int32_t end, const void *parcompar, __ext_compar_fn_t compar, const void *parswap, __ext_swap_fn_t swap, bool maxroot)
+{
+  int32_t  parent;
+  int32_t  child;
+  char    *buf;
+
+  if (base && size > 0 && compar) {
+    parent = start;
+    child = 2 * parent + 1;
+
+    if (swap == NULL) {
+      buf = calloc(1, size);
+      if (buf == NULL) {
+        return;
+      }
+    }
+
+    if (maxroot) {
+      while (child <= end) {
+        if (child + 1 <= end && (*compar)(elePtrAt(base, size, child), elePtrAt(base, size, child + 1), parcompar) < 0) {
+          child++;
+        }
+
+        if ((*compar)(elePtrAt(base, size, parent), elePtrAt(base, size, child), parcompar) > 0) {
+          break;
+        }
+
+        if (swap == NULL) {
+          doswap(elePtrAt(base, size, parent), elePtrAt(base, size, child), size, buf);
+        } else {
+          (*swap)(elePtrAt(base, size, parent), elePtrAt(base, size, child), parswap);
+        }
+
+        parent = child;
+        child = 2 * parent + 1;
+      }
+    } else {
+      while (child <= end) {
+        if (child + 1 <= end && (*compar)(elePtrAt(base, size, child), elePtrAt(base, size, child + 1), parcompar) > 0) {
+          child++;
+        }
+
+        if ((*compar)(elePtrAt(base, size, parent), elePtrAt(base, size, child), parcompar) < 0) {
+          break;
+        }
+
+        if (swap == NULL) {
+          doswap(elePtrAt(base, size, parent), elePtrAt(base, size, child), size, buf);
+        } else {
+          (*swap)(elePtrAt(base, size, parent), elePtrAt(base, size, child), parswap);
+        }
+
+        parent = child;
+        child = 2 * parent + 1;
+      }
+    }
+
+    if (swap == NULL) {
+      tfree(buf);
+    }
+  }
+}
+
+void taosheapsort(void *base, int32_t size, int32_t len, const void *parcompar, __ext_compar_fn_t compar, const void *parswap, __ext_swap_fn_t swap, bool maxroot)
+{
+  int32_t  i;
+
+  if (base && size > 0) {
+    for (i = len / 2 - 1; i >= 0; i--) {
+      taosheapadjust(base, size, i, len - 1, parcompar, compar, parswap, swap, maxroot);
+    }
+  }
+
+/*
+  char *buf = calloc(1, size);
+
+  for (i = len - 1; i > 0; i--) {
+    doswap(elePtrAt(base, size, 0), elePtrAt(base, size, i));
+    taosheapadjust(base, size, 0, i - 1, parcompar, compar, parswap, swap, maxroot);
+  }
+
+  tfree(buf);
+*/
+}
+

tests/examples/c/apitest.c

@@ -12,7 +12,7 @@ static void prepare_data(TAOS* taos) {
   result = taos_query(taos, "drop database if exists test;");
   taos_free_result(result);
   usleep(100000);
-  result = taos_query(taos, "create database test;");
+  result = taos_query(taos, "create database test precision 'us';");
   taos_free_result(result);
   usleep(100000);
   taos_select_db(taos, "test");
@@ -949,13 +949,45 @@ void verify_stream(TAOS* taos) {
   taos_close_stream(strm);
 }
 
+int32_t verify_schema_less(TAOS* taos) {
+  TAOS_RES *result;
+  result = taos_query(taos, "drop database if exists test;");
+  taos_free_result(result);
+  usleep(100000);
+  result = taos_query(taos, "create database test precision 'us';");
+  taos_free_result(result);
+  usleep(100000);
+
+  taos_select_db(taos, "test");
+  result = taos_query(taos, "create stable ste(ts timestamp, f int) tags(t1 bigint)");
+  taos_free_result(result);
+  usleep(100000);
+
+  char* lines[] = {
+      "st,t1=3i,t2=4,t3=\"t3\" c1=3i,c3=L\"passit\",c2=false,c4=4 1626006833639000000",
+      "st,t1=4i,t3=\"t4\",t2=5,t4=5 c1=3i,c3=L\"passitagin\",c2=true,c4=5,c5=5 1626006833640000000",
+      "ste,t2=5,t3=L\"ste\" c1=true,c2=4,c3=\"iam\" 1626056811823316532",
+      "st,t1=4i,t2=5,t3=\"t4\" c1=3i,c3=L\"passitagain\",c2=true,c4=5 1626006833642000000",
+      "ste,t2=5,t3=L\"ste2\" c3=\"iamszhou\",c4=false 1626056811843316532",
+      "ste,t2=5,t3=L\"ste2\" c3=\"iamszhou\",c4=false,c5=32b,c6=64s,c7=32w,c8=88.88f 1626056812843316532",
+      "st,t1=4i,t3=\"t4\",t2=5,t4=5 c1=3i,c3=L\"passitagin\",c2=true,c4=5,c5=5,c6=7u 1626006933640000000",
+      "stf,t1=4i,t3=\"t4\",t2=5,t4=5 c1=3i,c3=L\"passitagin\",c2=true,c4=5,c5=5,c6=7u 1626006933640000000",
+      "stf,t1=4i,t3=\"t4\",t2=5,t4=5 c1=3i,c3=L\"passitagin_stf\",c2=false,c5=5,c6=7u 1626006933641a"
+  };
+
+//  int code = taos_insert_lines(taos, lines , sizeof(lines)/sizeof(char*));
+  int code = taos_insert_lines(taos, &lines[0], 1);
+  code = taos_insert_lines(taos, &lines[1], 1);
+
+  return code;
+}
+
 int main(int argc, char *argv[]) {
   const char* host = "127.0.0.1";
   const char* user = "root";
   const char* passwd = "taosdata";
 
   taos_options(TSDB_OPTION_TIMEZONE, "GMT-8");
-
   TAOS* taos = taos_connect(host, user, passwd, "", 0);
   if (taos == NULL) {
     printf("\033[31mfailed to connect to db, reason:%s\033[0m\n", taos_errstr(taos));
@@ -967,6 +999,12 @@ int main(int argc, char *argv[]) {
   info = taos_get_client_info(taos);
   printf("client info: %s\n", info);
 
+  printf("************  verify shemaless  *************\n");
+  int code = verify_schema_less(taos);
+  if (code == 0) {
+    return code;
+  }
+
   printf("************  verify query  *************\n");
   verify_query(taos);
 

tests/script/general/parser/line_insert.sim

+system sh/stop_dnodes.sh
+
+system sh/deploy.sh -n dnode1 -i 1
+system sh/cfg.sh -n dnode1 -c walLevel -v 1
+system sh/exec.sh -n dnode1 -s start
+sleep 2000
+sql connect
+
+print =============== step1
+$db = testlp
+$mte = ste
+$mt = st
+sql drop database $db -x step1
+step1:
+sql create database $db precision 'us'
+sql use $db
+sql create stable $mte (ts timestamp, f int) TAGS(t1 bigint)
+
+line_insert st,t1=3i,t2=4,t3="t3" c1=3i,c3=L"passit",c2=false,c4=4 1626006833639000000
+line_insert st,t1=4i,t3="t41",t2=5 c1=3i,c3=L"passiT",c2=true,c4=5 1626006833640000000
+line_insert stf,t1=4i,t2=5,t3="t4" c1=3i,c3=L"passitagain",c2=true,c4=5 1626006833642000000  
+line_insert ste,t2=5,t3=L"ste" c1=true,c2=4,c3="iam" 1626056811823316532
+
+sql select * from st
+if $rows != 2 then
+  return -1
+endi
+
+if $data00 != @21-07-11 20:33:53.639000@ then
+  return -1
+endi
+
+if $data03 != @passit@ then
+  return -1
+endi
+
+sql select * from stf
+if $rows != 1 then
+  return -1
+endi
+
+sql select * from ste
+if $rows != 1 then
+  return -1
+endi
+
+#print =============== clear
+sql drop database $db
+sql show databases
+if $rows != 0 then 
+  return -1
+endi
+
+system sh/exec.sh -n dnode1 -s stop -x SIGINT

tests/script/general/parser/select_with_tags.sim

@@ -190,32 +190,32 @@ if $rows != 12800 then
   return -1
 endi
 
-sql select top(c1, 100), tbname, t1, t2 from select_tags_mt0;
-if $rows != 100 then
+sql select top(c1, 80), tbname, t1, t2 from select_tags_mt0;
+if $rows != 80 then
    return -1
 endi
 
-if $data00 != @70-01-01 08:03:30.100@ then
+if $data00 != @70-01-01 08:03:40.100@ then
    return -1
 endi
 
-if $data10 != @70-01-01 08:03:30.200@ then
+if $data10 != @70-01-01 08:03:40.200@ then
    return -1
 endi
 
-if $data01 != 110 then
+if $data01 != 111 then
    return -1
 endi
 
-if $data02 != @select_tags_tb11@ then
+if $data02 != @select_tags_tb12@ then
    return -1
 endi
 
-if $data03 != 11 then
+if $data03 != 12 then
    return -1
 endi
 
-if $data04 != @abc11@ then
+if $data04 != @abc12@ then
    return -1
 endi
 
@@ -248,8 +248,8 @@ if $data04 != @abc12@ then
    return -1
 endi
 
-sql select bottom(c1, 100), tbname, t1, t2 from select_tags_mt0;
-if $rows != 100 then
+sql select bottom(c1, 72), tbname, t1, t2 from select_tags_mt0;
+if $rows != 72 then
    return -1
 endi
 

tests/tsim/inc/sim.h

@@ -87,6 +87,8 @@ enum {
   SIM_CMD_RESTFUL,
   SIM_CMD_TEST,
   SIM_CMD_RETURN,
+  SIM_CMD_LINE_INSERT,
+  SIM_CMD_LINE_INSERT_ERROR,
   SIM_CMD_END
 };
 
@@ -172,6 +174,8 @@ bool     simExecuteSqlCmd(SScript *script, char *option);
 bool     simExecuteSqlErrorCmd(SScript *script, char *rest);
 bool     simExecuteSqlSlowCmd(SScript *script, char *option);
 bool     simExecuteRestfulCmd(SScript *script, char *rest);
+bool     simExecuteLineInsertCmd(SScript *script, char *option);
+bool     simExecuteLineInsertErrorCmd(SScript *script, char *option);
 void     simVisuallizeOption(SScript *script, char *src, char *dst);
 
 #endif
\ No newline at end of file

tests/tsim/src/simExe.c

@@ -1067,3 +1067,49 @@ bool simExecuteSqlErrorCmd(SScript *script, char *rest) {
 
   return false;
 }
+
+bool simExecuteLineInsertCmd(SScript *script, char *rest) {
+  char buf[TSDB_MAX_BINARY_LEN];
+
+  simVisuallizeOption(script, rest, buf);
+  rest = buf;
+
+  SCmdLine *line = &script->lines[script->linePos];
+
+  simInfo("script:%s, %s", script->fileName, rest);
+  simLogSql(buf, true);
+  char *  lines[] = {rest};
+  int32_t ret = taos_insert_lines(script->taos, lines, 1);
+  if (ret == TSDB_CODE_SUCCESS) {
+    simDebug("script:%s, taos:%p, %s executed. success.", script->fileName, script->taos, rest);
+    script->linePos++;
+    return true;
+  } else {
+    sprintf(script->error, "lineNum: %d. line: %s failed, ret:%d:%s", line->lineNum, rest,
+            ret & 0XFFFF, tstrerror(ret));
+    return false;
+  }
+}
+
+bool simExecuteLineInsertErrorCmd(SScript *script, char *rest) {
+  char buf[TSDB_MAX_BINARY_LEN];
+
+  simVisuallizeOption(script, rest, buf);
+  rest = buf;
+
+  SCmdLine *line = &script->lines[script->linePos];
+
+  simInfo("script:%s, %s", script->fileName, rest);
+  simLogSql(buf, true);
+  char *  lines[] = {rest};
+  int32_t ret = taos_insert_lines(script->taos, lines, 1);
+  if (ret == TSDB_CODE_SUCCESS) {
+    sprintf(script->error, "script:%s, taos:%p, %s executed. expect failed, but success.", script->fileName, script->taos, rest);
+    script->linePos++;
+    return false;
+  } else {
+    simDebug("lineNum: %d. line: %s failed, ret:%d:%s. Expect failed, so success", line->lineNum, rest,
+            ret & 0XFFFF, tstrerror(ret));
+    return true;
+  }
+}

tests/tsim/src/simParse.c

@@ -838,6 +838,38 @@ bool simParseRunBackCmd(char *rest, SCommand *pCmd, int32_t lineNum) {
   return true;
 }
 
+bool simParseLineInsertCmd(char* rest, SCommand* pCmd, int32_t lineNum) {
+  int32_t expLen;
+
+  rest++;
+  cmdLine[numOfLines].cmdno = SIM_CMD_LINE_INSERT;
+  cmdLine[numOfLines].lineNum = lineNum;
+  cmdLine[numOfLines].optionOffset = optionOffset;
+  expLen = (int32_t)strlen(rest);
+  memcpy(optionBuffer + optionOffset, rest, expLen);
+  optionOffset += expLen + 1;
+  *(optionBuffer + optionOffset - 1) = 0;
+
+  numOfLines++;
+  return true;
+}
+
+bool simParseLineInsertErrorCmd(char* rest, SCommand* pCmd, int32_t lineNum) {
+  int32_t expLen;
+
+  rest++;
+  cmdLine[numOfLines].cmdno = SIM_CMD_LINE_INSERT;
+  cmdLine[numOfLines].lineNum = lineNum;
+  cmdLine[numOfLines].optionOffset = optionOffset;
+  expLen = (int32_t)strlen(rest);
+  memcpy(optionBuffer + optionOffset, rest, expLen);
+  optionOffset += expLen + 1;
+  *(optionBuffer + optionOffset - 1) = 0;
+
+  numOfLines++;
+  return true;
+}
+
 void simInitsimCmdList() {
   int32_t cmdno;
   memset(simCmdList, 0, SIM_CMD_END * sizeof(SCommand));
@@ -1049,4 +1081,20 @@ void simInitsimCmdList() {
   simCmdList[cmdno].parseCmd = simParseReturnCmd;
   simCmdList[cmdno].executeCmd = simExecuteReturnCmd;
   simAddCmdIntoHash(&(simCmdList[cmdno]));
+
+  cmdno = SIM_CMD_LINE_INSERT;
+  simCmdList[cmdno].cmdno = cmdno;
+  strcpy(simCmdList[cmdno].name, "line_insert");
+  simCmdList[cmdno].nlen = (int16_t)strlen(simCmdList[cmdno].name);
+  simCmdList[cmdno].parseCmd = simParseLineInsertCmd;
+  simCmdList[cmdno].executeCmd = simExecuteLineInsertCmd;
+  simAddCmdIntoHash(&(simCmdList[cmdno]));
+
+  cmdno = SIM_CMD_LINE_INSERT_ERROR;
+  simCmdList[cmdno].cmdno = cmdno;
+  strcpy(simCmdList[cmdno].name, "line_insert_error");
+  simCmdList[cmdno].nlen = (int16_t)strlen(simCmdList[cmdno].name);
+  simCmdList[cmdno].parseCmd = simParseLineInsertErrorCmd;
+  simCmdList[cmdno].executeCmd = simExecuteLineInsertErrorCmd;
+  simAddCmdIntoHash(&(simCmdList[cmdno]));
 }