Merge branch 'develop' into xiaoping/add_test_case

cmake/define.inc

@@ -122,10 +122,14 @@ IF (TD_LINUX)
     ADD_DEFINITIONS(-D_TD_NINGSI_60)
     MESSAGE(STATUS "set ningsi macro to true")
   ENDIF ()
-  
-  SET(DEBUG_FLAGS "-O0 -g3 -DDEBUG")
+
+  IF (TD_MEMORY_SANITIZER)
+    SET(DEBUG_FLAGS "-fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all -fsanitize=float-divide-by-zero -fsanitize=float-cast-overflow -fno-sanitize=null -fno-sanitize=alignment -static-libasan -O0 -g3 -DDEBUG")
+  ELSE ()
+    SET(DEBUG_FLAGS "-O0 -g3 -DDEBUG")
+  ENDIF ()
   SET(RELEASE_FLAGS "-O3 -Wno-error")
-  
+
   IF (${COVER} MATCHES "true")
     MESSAGE(STATUS "Test coverage mode, add extra flags")
     SET(GCC_COVERAGE_COMPILE_FLAGS "-fprofile-arcs -ftest-coverage")
@@ -144,7 +148,11 @@ IF (TD_DARWIN_64)
   ADD_DEFINITIONS(-DUSE_LIBICONV)
   MESSAGE(STATUS "darwin64 is defined")
   SET(COMMON_FLAGS "-std=gnu99 -Wall -Werror -Wno-missing-braces -fPIC -msse4.2 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILE")
-  SET(DEBUG_FLAGS "-O0 -g3 -DDEBUG")
+  IF (TD_MEMORY_SANITIZER)
+    SET(DEBUG_FLAGS "-fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all -fsanitize=float-divide-by-zero -fsanitize=float-cast-overflow -fno-sanitize=null -fno-sanitize=alignment -O0 -g3 -DDEBUG")
+  ELSE ()
+    SET(DEBUG_FLAGS "-O0 -g3 -DDEBUG")
+  ENDIF ()
   SET(RELEASE_FLAGS "-Og")
   INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/deps/cJson/inc)
   INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/deps/lz4/inc)
@@ -162,7 +170,14 @@ IF (TD_WINDOWS)
     IF (MSVC AND (MSVC_VERSION GREATER_EQUAL 1900))
       SET(COMMON_FLAGS "${COMMON_FLAGS} /Wv:18")
     ENDIF ()
-    SET(DEBUG_FLAGS "/fsanitize=thread /fsanitize=leak /fsanitize=memory /fsanitize=undefined /fsanitize=hwaddress /Zi /W3 /GL")
+
+    IF (TD_MEMORY_SANITIZER)
+      MESSAGE("memory sanitizer detected as true")
+      SET(DEBUG_FLAGS "/fsanitize=address /Zi /W3 /GL")
+    ELSE ()
+      MESSAGE("memory sanitizer detected as false")
+      SET(DEBUG_FLAGS "/Zi /W3 /GL")
+    ENDIF ()
     SET(RELEASE_FLAGS "/W0 /O3 /GL")
   ENDIF ()
 
@@ -171,7 +186,7 @@ IF (TD_WINDOWS)
   INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/deps/regex)
   INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/deps/wepoll/inc)
   INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/deps/MsvcLibX/include)
-ENDIF () 
+ENDIF ()
 
 IF (TD_WINDOWS_64)
   ADD_DEFINITIONS(-D_M_X64)

cmake/input.inc

@@ -83,3 +83,8 @@ SET(TD_BUILD_JDBC TRUE)
 IF (${BUILD_JDBC} MATCHES "false")
   SET(TD_BUILD_JDBC FALSE)
 ENDIF ()
+
+SET(TD_MEMORY_SANITIZER FALSE)
+IF (${MEMORY_SANITIZER} MATCHES "true")
+  SET(TD_MEMORY_SANITIZER TRUE)
+ENDIF ()

documentation20/cn/00.index/docs.md

@@ -15,6 +15,7 @@ TDengine是一个高效的存储、查询、分析时序大数据的平台，专
 * [命令行程序TAOS](/getting-started#console)：访问TDengine的简便方式
 * [极速体验](/getting-started#demo)：运行示例程序，快速体验高效的数据插入、查询
 * [支持平台列表](/getting-started#platforms)：TDengine服务器和客户端支持的平台列表
+* [Kubenetes部署](https://taosdata.github.io/TDengine-Operator/zh/index.html)：TDengine在Kubenetes环境进行部署的详细说明
 
 ## [整体架构](/architecture)
 

documentation20/cn/03.architecture/docs.md

@@ -176,7 +176,7 @@ TDengine 分布式架构的逻辑结构图如下：
 
 **通讯方式：**TDengine系统的各个数据节点之间，以及应用驱动与各数据节点之间的通讯是通过TCP/UDP进行的。因为考虑到物联网场景，数据写入的包一般不大，因此TDengine 除采用TCP做传输之外，还采用UDP方式，因为UDP 更加高效，而且不受连接数的限制。TDengine实现了自己的超时、重传、确认等机制，以确保UDP的可靠传输。对于数据量不到15K的数据包，采取UDP的方式进行传输，超过15K的，或者是查询类的操作，自动采取TCP的方式进行传输。同时，TDengine根据配置和数据包，会自动对数据进行压缩/解压缩，数字签名/认证等处理。对于数据节点之间的数据复制，只采用TCP方式进行数据传输。
 
-**FQDN配置**：一个数据节点有一个或多个FQDN，可以在系统配置文件taos.cfg通过参数“fqdn"进行指定，如果没有指定，系统将自动获取计算机的hostname作为其FQDN。如果节点没有配置FQDN，可以直接将该节点的配置参数fqdn设置为它的IP地址。但不建议使用IP，因为IP地址可变，一旦变化，将让集群无法正常工作。一个数据节点的EP(End Point)由FQDN + Port组成。采用FQDN，需要保证DNS服务正常工作，或者在节点以及应用所在的节点配置好hosts文件。
+**FQDN配置**：一个数据节点有一个或多个FQDN，可以在系统配置文件taos.cfg通过参数“fqdn"进行指定，如果没有指定，系统将自动获取计算机的hostname作为其FQDN。如果节点没有配置FQDN，可以直接将该节点的配置参数fqdn设置为它的IP地址。但不建议使用IP，因为IP地址可变，一旦变化，将让集群无法正常工作。一个数据节点的EP(End Point)由FQDN + Port组成。采用FQDN，需要保证DNS服务正常工作，或者在节点以及应用所在的节点配置好hosts文件。另外，这个参数值的长度需要控制在 96 个字符以内。
 
 **端口配置：**一个数据节点对外的端口由TDengine的系统配置参数serverPort决定，对集群内部通讯的端口是serverPort+5。集群内数据节点之间的数据复制操作还占有一个TCP端口，是serverPort+10. 为支持多线程高效的处理UDP数据，每个对内和对外的UDP连接，都需要占用5个连续的端口。因此一个数据节点总的端口范围为serverPort到serverPort + 10，总共11个TCP/UDP端口。（另外还可能有 RESTful、Arbitrator 所使用的端口，那样的话就一共是 13 个。）使用时，需要确保防火墙将这些端口打开，以备使用。每个数据节点可以配置不同的serverPort。（详细的端口情况请参见 [TDengine 2.0 端口说明](https://www.taosdata.com/cn/documentation/faq#port)）
 

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

@@ -325,10 +325,12 @@ for (int i = 0; i < numOfRows; i++){
 }
 s.setString(2, s2, 10);
 
-// AddBatch 之后，可以再设定新的表名、TAGS、VALUES 取值，这样就能实现一次执行向多个数据表写入：
+// AddBatch 之后，缓存并未清空。为避免混乱，并不推荐在 ExecuteBatch 之前再次绑定新一批的数据：
 s.columnDataAddBatch();
-// 执行语句：
+// 执行绑定数据后的语句：
 s.columnDataExecuteBatch();
+// 执行语句后清空缓存。在清空之后，可以复用当前的对象，绑定新的一批数据（可以是新表名、新 TAGS 值、新 VALUES 值）：
+s.columnDataClearBatch();
 // 执行完毕，释放资源：
 s.columnDataCloseBatch();
 ```

documentation20/cn/11.administrator/docs.md

@@ -99,7 +99,7 @@ taosd -C
 下面仅仅列出一些重要的配置参数，更多的参数请看配置文件里的说明。各个参数的详细介绍及作用请看前述章节，而且这些参数的缺省配置都是工作的，一般无需设置。**注意：配置修改后，需要重启*taosd*服务才能生效。**
 
 - firstEp: taosd启动时，主动连接的集群中首个dnode的end point, 默认值为localhost:6030。
-- fqdn：数据节点的FQDN，缺省为操作系统配置的第一个hostname。如果习惯IP地址访问，可设置为该节点的IP地址。
+- fqdn：数据节点的FQDN，缺省为操作系统配置的第一个hostname。如果习惯IP地址访问，可设置为该节点的IP地址。这个参数值的长度需要控制在 96 个字符以内。
 - serverPort：taosd启动后，对外服务的端口号，默认值为6030。（RESTful服务使用的端口号是在此基础上+11，即默认值为6041。）
 - dataDir: 数据文件目录，所有的数据文件都将写入该目录。默认值：/var/lib/taos。
 - logDir：日志文件目录，客户端和服务器的运行日志文件将写入该目录。默认值：/var/log/taos。

src/client/inc/tscUtil.h

@@ -138,6 +138,7 @@ bool isSimpleAggregateRv(SQueryInfo* pQueryInfo);
 
 bool tscNonOrderedProjectionQueryOnSTable(SQueryInfo *pQueryInfo, int32_t tableIndex);
 bool tscOrderedProjectionQueryOnSTable(SQueryInfo* pQueryInfo, int32_t tableIndex);
+bool tscIsDiffDerivQuery(SQueryInfo* pQueryInfo);
 bool tscIsProjectionQueryOnSTable(SQueryInfo* pQueryInfo, int32_t tableIndex);
 
 bool tscIsProjectionQuery(SQueryInfo* pQueryInfo);

src/client/inc/tsclient.h

@@ -266,6 +266,7 @@ typedef struct SSqlObj {
 
 typedef struct SSqlStream {
   SSqlObj *pSql;
+  void *  cqhandle;  // stream belong to SCQContext handle
   const char* dstTable;
   uint32_t streamId;
   char     listed;

src/client/src/tscParseInsert.c

@@ -107,14 +107,10 @@ int tsParseTime(SStrToken *pToken, int64_t *time, char **next, char *error, int1
       return tscInvalidOperationMsg(error, "value expected in timestamp", sToken.z);
     }
 
-    if (parseAbsoluteDuration(valueToken.z, valueToken.n, &interval) != TSDB_CODE_SUCCESS) {
+    if (parseAbsoluteDuration(valueToken.z, valueToken.n, &interval, timePrec) != TSDB_CODE_SUCCESS) {
       return TSDB_CODE_TSC_INVALID_OPERATION;
     }
 
-    if (timePrec == TSDB_TIME_PRECISION_MILLI) {
-      interval /= 1000;
-    }
-
     if (sToken.type == TK_PLUS) {
       useconds += interval;
     } else {
@@ -468,6 +464,10 @@ int tsParseOneRow(char **str, STableDataBlocks *pDataBlocks, int16_t timePrec, i
 
       int32_t cnt = 0;
       int32_t j = 0;
+      if (sToken.n >= TSDB_MAX_BYTES_PER_ROW) {
+        return tscSQLSyntaxErrMsg(pInsertParam->msg, "too long string", sToken.z);
+      }
+      
       for (uint32_t k = 1; k < sToken.n - 1; ++k) {
         if (sToken.z[k] == '\\' || (sToken.z[k] == delim && sToken.z[k + 1] == delim)) {
             tmpTokenBuf[j] = sToken.z[k + 1];
@@ -711,7 +711,7 @@ static int32_t doParseInsertStatement(SInsertStatementParam *pInsertParam, char
   }
 
   code = TSDB_CODE_TSC_INVALID_OPERATION;
-  char tmpTokenBuf[16*1024] = {0};  // used for deleting Escape character: \\, \', \"
+  char tmpTokenBuf[TSDB_MAX_BYTES_PER_ROW] = {0};  // used for deleting Escape character: \\, \', \"
 
   int32_t numOfRows = 0;
   code = tsParseValues(str, dataBuf, maxNumOfRows, pInsertParam, &numOfRows, tmpTokenBuf);

src/client/src/tscProfile.c

@@ -19,6 +19,7 @@
 #include "ttimer.h"
 #include "tutil.h"
 #include "taosmsg.h"
+#include "tcq.h"
 
 #include "taos.h"
 
@@ -294,24 +295,34 @@ int tscBuildQueryStreamDesc(void *pMsg, STscObj *pObj) {
   return msgLen;
 }
 
-void tscKillConnection(STscObj *pObj) {
-  pthread_mutex_lock(&pObj->mutex);
+// cqContext->dbconn is killed then call this callback
+void cqConnKilledNotify(void* handle, void* conn) {
+  if (handle == NULL || conn == NULL){
+    return ;
+  } 
 
-  SSqlObj *pSql = pObj->sqlList;
-  while (pSql) {
-    pSql = pSql->next;
-  }
-  
+  SCqContext* pContext = (SCqContext*) handle;
+  if (pContext->dbConn == conn){
+    atomic_store_ptr(&(pContext->dbConn), NULL);
+  } 
+}
 
+void tscKillConnection(STscObj *pObj) {
+  // get stream header by locked
+  pthread_mutex_lock(&pObj->mutex);
   SSqlStream *pStream = pObj->streamList;
+  pthread_mutex_unlock(&pObj->mutex);
+
   while (pStream) {
     SSqlStream *tmp = pStream->next;
+    // set associate variant to NULL
+    cqConnKilledNotify(pStream->cqhandle, pObj);
+    // taos_close_stream function call pObj->mutet lock , careful death-lock
     taos_close_stream(pStream);
     pStream = tmp;
   }
 
-  pthread_mutex_unlock(&pObj->mutex);
-
   tscDebug("connection:%p is killed", pObj);
   taos_close(pObj);
 }
+

src/client/src/tscServer.c

@@ -912,7 +912,7 @@ int tscBuildQueryMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
   }
   
   SGroupbyExpr *pGroupbyExpr = query.pGroupbyExpr;
-  if (pGroupbyExpr->numOfGroupCols > 0) {
+  if (pGroupbyExpr != NULL && pGroupbyExpr->numOfGroupCols > 0) {
     pQueryMsg->orderByIdx = htons(pGroupbyExpr->orderIndex);
     pQueryMsg->orderType = htons(pGroupbyExpr->orderType);
 

src/client/src/tscStream.c

@@ -53,9 +53,7 @@ static int64_t tscGetRetryDelayTime(SSqlStream* pStream, int64_t slidingTime, in
 
   if (pStream->interval.intervalUnit != 'n' && pStream->interval.intervalUnit != 'y') {
     // change to ms
-    if (prec == TSDB_TIME_PRECISION_MICRO) {
-      slidingTime = slidingTime / 1000;
-    }
+    slidingTime = convertTimePrecision(slidingTime, pStream->precision, TSDB_TIME_PRECISION_MILLI);
 
     if (slidingTime < retryDelta) {
       return slidingTime;
@@ -139,8 +137,13 @@ static void tscProcessStreamTimer(void *handle, void *tmrId) {
 
   pStream->numOfRes = 0;  // reset the numOfRes.
   SSqlObj *pSql = pStream->pSql;
+
+  // pSql ==  NULL  maybe killStream already called
+  if(pSql == NULL) {
+    return ;
+  }
   SQueryInfo* pQueryInfo = tscGetQueryInfo(&pSql->cmd);
-  tscDebug("0x%"PRIx64" timer launch query", pSql->self);
+  tscDebug("0x%"PRIx64" add into timer", pSql->self);
 
   if (pStream->isProject) {
     /*
@@ -157,11 +160,7 @@ static void tscProcessStreamTimer(void *handle, void *tmrId) {
     pQueryInfo->window.skey = pStream->stime;
     int64_t etime = taosGetTimestamp(pStream->precision);
     // delay to wait all data in last time window
-    if (pStream->precision == TSDB_TIME_PRECISION_MICRO) {
-      etime -= tsMaxStreamComputDelay * 1000l;
-    } else {
-      etime -= tsMaxStreamComputDelay;
-    }
+    etime -= convertTimePrecision(tsMaxStreamComputDelay, TSDB_TIME_PRECISION_MILLI, pStream->precision);
     if (etime > pStream->etime) {
       etime = pStream->etime;
     } else if (pStream->interval.intervalUnit != 'y' && pStream->interval.intervalUnit != 'n') {
@@ -178,8 +177,8 @@ static void tscProcessStreamTimer(void *handle, void *tmrId) {
       int64_t timer = pStream->interval.sliding;
       if (pStream->interval.intervalUnit == 'y' || pStream->interval.intervalUnit == 'n') {
         timer = 86400 * 1000l;
-      } else if (pStream->precision == TSDB_TIME_PRECISION_MICRO) {
-        timer /= 1000l;
+      } else {
+        timer = convertTimePrecision(timer, pStream->precision, TSDB_TIME_PRECISION_MILLI);
       }
       tscSetRetryTimer(pStream, pSql, timer);
       return;
@@ -339,8 +338,12 @@ static void tscSetRetryTimer(SSqlStream *pStream, SSqlObj *pSql, int64_t timer)
   if (pStream->isProject) {
     int64_t now = taosGetTimestamp(pStream->precision);
     int64_t etime = now > pStream->etime ? pStream->etime : now;
-
-    if (pStream->etime < now && now - pStream->etime > tsMaxRetentWindow) {
+    int64_t maxRetent = tsMaxRetentWindow * 1000;
+    if(pStream->precision == TSDB_TIME_PRECISION_MICRO) {
+      maxRetent *= 1000;
+    }
+         
+    if (pStream->etime < now && now - pStream->etime > maxRetent) {
       /*
        * current time window will be closed, since it too early to exceed the maxRetentWindow value
        */
@@ -369,9 +372,8 @@ static void tscSetRetryTimer(SSqlStream *pStream, SSqlObj *pSql, int64_t timer)
 }
 
 static int64_t getLaunchTimeDelay(const SSqlStream* pStream) {
-  int64_t maxDelay =
-      (pStream->precision == TSDB_TIME_PRECISION_MICRO) ? tsMaxStreamComputDelay * 1000L : tsMaxStreamComputDelay;
-  
+  int64_t maxDelay = convertTimePrecision(tsMaxStreamComputDelay, TSDB_TIME_PRECISION_MILLI, pStream->precision);
+
   int64_t delayDelta = maxDelay;
   if (pStream->interval.intervalUnit != 'n' && pStream->interval.intervalUnit != 'y') {
     delayDelta = (int64_t)(pStream->interval.sliding * tsStreamComputDelayRatio);
@@ -438,16 +440,14 @@ static void tscSetNextLaunchTimer(SSqlStream *pStream, SSqlObj *pSql) {
 
   timer += getLaunchTimeDelay(pStream);
   
-  if (pStream->precision == TSDB_TIME_PRECISION_MICRO) {
-    timer = timer / 1000L;
-  }
+  timer = convertTimePrecision(timer, pStream->precision, TSDB_TIME_PRECISION_MILLI);
 
   tscSetRetryTimer(pStream, pSql, timer);
 }
 
 static int32_t tscSetSlidingWindowInfo(SSqlObj *pSql, SSqlStream *pStream) {
   int64_t minIntervalTime =
-      (pStream->precision == TSDB_TIME_PRECISION_MICRO) ? tsMinIntervalTime * 1000L : tsMinIntervalTime;
+      convertTimePrecision(tsMinIntervalTime, TSDB_TIME_PRECISION_MILLI, pStream->precision);
   
   SQueryInfo* pQueryInfo = tscGetQueryInfo(&pSql->cmd);
 
@@ -471,7 +471,7 @@ static int32_t tscSetSlidingWindowInfo(SSqlObj *pSql, SSqlStream *pStream) {
   }
 
   int64_t minSlidingTime =
-      (pStream->precision == TSDB_TIME_PRECISION_MICRO) ? tsMinSlidingTime * 1000L : tsMinSlidingTime;
+      convertTimePrecision(tsMinSlidingTime, TSDB_TIME_PRECISION_MILLI, pStream->precision);
 
   if (pQueryInfo->interval.intervalUnit != 'n' && pQueryInfo->interval.intervalUnit!= 'y' && pQueryInfo->interval.sliding < minSlidingTime) {
     tscWarn("0x%"PRIx64" stream:%p, original sliding value:%" PRId64 " too small, reset to:%" PRId64, pSql->self, pStream,
@@ -539,13 +539,12 @@ static int64_t tscGetLaunchTimestamp(const SSqlStream *pStream) {
     timer = pStream->stime - now;
   }
 
-  int64_t startDelay =
-      (pStream->precision == TSDB_TIME_PRECISION_MICRO) ? tsStreamCompStartDelay * 1000L : tsStreamCompStartDelay;
-  
+  int64_t startDelay = convertTimePrecision(tsStreamCompStartDelay, TSDB_TIME_PRECISION_MILLI, pStream->precision);
+
   timer += getLaunchTimeDelay(pStream);
   timer += startDelay;
   
-  return (pStream->precision == TSDB_TIME_PRECISION_MICRO) ? timer / 1000L : timer;
+  return convertTimePrecision(timer, pStream->precision, TSDB_TIME_PRECISION_MILLI);
 }
 
 static void tscCreateStream(void *param, TAOS_RES *res, int code) {
@@ -664,7 +663,7 @@ void cbParseSql(void* param, TAOS_RES* res, int code) {
 }
 
 TAOS_STREAM *taos_open_stream_withname(TAOS *taos, const char* dstTable, const char *sqlstr, void (*fp)(void *param, TAOS_RES *, TAOS_ROW row),
-                              int64_t stime, void *param, void (*callback)(void *)) {
+                              int64_t stime, void *param, void (*callback)(void *), void* cqhandle) {
   STscObj *pObj = (STscObj *)taos;
   if (pObj == NULL || pObj->signature != pObj) return NULL;
 
@@ -697,6 +696,7 @@ TAOS_STREAM *taos_open_stream_withname(TAOS *taos, const char* dstTable, const c
   pStream->callback = callback;
   pStream->param = param;
   pStream->pSql = pSql;
+  pStream->cqhandle = cqhandle;
   pSql->pStream = pStream;
   pSql->param = pStream;
   pSql->maxRetry = TSDB_MAX_REPLICA;
@@ -745,7 +745,7 @@ TAOS_STREAM *taos_open_stream_withname(TAOS *taos, const char* dstTable, const c
 
 TAOS_STREAM *taos_open_stream(TAOS *taos, const char *sqlstr, void (*fp)(void *param, TAOS_RES *, TAOS_ROW row),
                               int64_t stime, void *param, void (*callback)(void *)) {  
-  return taos_open_stream_withname(taos, "", sqlstr, fp, stime, param, callback);
+  return taos_open_stream_withname(taos, "", sqlstr, fp, stime, param, callback, NULL);
 }
 
 void taos_close_stream(TAOS_STREAM *handle) {

src/client/src/tscUtil.c

@@ -255,10 +255,14 @@ bool tscIsProjectionQuery(SQueryInfo* pQueryInfo) {
   size_t size = tscNumOfExprs(pQueryInfo);
 
   for (int32_t i = 0; i < size; ++i) {
-    int32_t functionId = tscExprGet(pQueryInfo, i)->base.functionId;
+    int32_t f = tscExprGet(pQueryInfo, i)->base.functionId;
+    if (f == TSDB_FUNC_TS_DUMMY) {
+      continue;
+    }
 
-    if (functionId != TSDB_FUNC_PRJ && functionId != TSDB_FUNC_TAGPRJ && functionId != TSDB_FUNC_TAG &&
-        functionId != TSDB_FUNC_TS && functionId != TSDB_FUNC_ARITHM) {
+    if (f != TSDB_FUNC_PRJ && f != TSDB_FUNC_TAGPRJ && f != TSDB_FUNC_TAG &&
+        f != TSDB_FUNC_TS && f != TSDB_FUNC_ARITHM && f != TSDB_FUNC_DIFF &&
+        f != TSDB_FUNC_DERIVATIVE) {
       return false;
     }
   }
@@ -266,6 +270,24 @@ bool tscIsProjectionQuery(SQueryInfo* pQueryInfo) {
   return true;
 }
 
+bool tscIsDiffDerivQuery(SQueryInfo* pQueryInfo) {
+  size_t size = tscNumOfExprs(pQueryInfo);
+
+  for (int32_t i = 0; i < size; ++i) {
+    int32_t f = tscExprGet(pQueryInfo, i)->base.functionId;
+    if (f == TSDB_FUNC_TS_DUMMY) {
+      continue;
+    }
+
+    if (f == TSDB_FUNC_DIFF || f == TSDB_FUNC_DERIVATIVE) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+
 bool tscHasColumnFilter(SQueryInfo* pQueryInfo) {
   // filter on primary timestamp column
   if (pQueryInfo->window.skey != INT64_MIN || pQueryInfo->window.ekey != INT64_MAX) {
@@ -962,6 +984,9 @@ static void destroyDummyInputOperator(void* param, int32_t numOfOutput) {
 
   pInfo->block = destroyOutputBuf(pInfo->block);
   pInfo->pSql = NULL;
+
+  cleanupResultRowInfo(&pInfo->pTableQueryInfo->resInfo);
+  tfree(pInfo->pTableQueryInfo);
 }
 
 // todo this operator servers as the adapter for Operator tree and SqlRes result, remove it later
@@ -4263,10 +4288,9 @@ int32_t tscCreateQueryFromQueryInfo(SQueryInfo* pQueryInfo, SQueryAttr* pQueryAt
 
   STableMetaInfo* pTableMetaInfo = pQueryInfo->pTableMetaInfo[0];
 
-  pQueryAttr->pGroupbyExpr    = calloc(1, sizeof(SGroupbyExpr));
-  *(pQueryAttr->pGroupbyExpr) = pQueryInfo->groupbyExpr;
-
   if (pQueryInfo->groupbyExpr.numOfGroupCols > 0) {
+    pQueryAttr->pGroupbyExpr    = calloc(1, sizeof(SGroupbyExpr));
+    *(pQueryAttr->pGroupbyExpr) = pQueryInfo->groupbyExpr;
     pQueryAttr->pGroupbyExpr->columnInfo = taosArrayDup(pQueryInfo->groupbyExpr.columnInfo);
   } else {
     assert(pQueryInfo->groupbyExpr.columnInfo == NULL);
@@ -4345,7 +4369,7 @@ int32_t tscCreateQueryFromQueryInfo(SQueryInfo* pQueryInfo, SQueryAttr* pQueryAt
     return TSDB_CODE_TSC_INVALID_OPERATION;
   }
 
-  if (pQueryAttr->pGroupbyExpr->numOfGroupCols < 0) {
+  if (pQueryAttr->pGroupbyExpr != NULL && pQueryAttr->pGroupbyExpr->numOfGroupCols < 0) {
     tscError("%p illegal value of numOfGroupCols in query msg: %d", addr, pQueryInfo->groupbyExpr.numOfGroupCols);
     return TSDB_CODE_TSC_INVALID_OPERATION;
   }

src/common/src/tglobal.c

@@ -831,6 +831,16 @@ static void doInitGlobalConfig(void) {
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
 
+  cfg.option = "precision";
+  cfg.ptr = &tsTimePrecision;
+  cfg.valType = TAOS_CFG_VTYPE_INT8;
+  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
+  cfg.minValue = TSDB_MIN_PRECISION;
+  cfg.maxValue = TSDB_MAX_PRECISION;
+  cfg.ptrLength = 0;
+  cfg.unitType = TAOS_CFG_UTYPE_NONE;
+  taosInitConfigOption(cfg);
+
   cfg.option = "comp";
   cfg.ptr = &tsCompression;
   cfg.valType = TAOS_CFG_VTYPE_INT8;
@@ -901,6 +911,16 @@ static void doInitGlobalConfig(void) {
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
 
+  cfg.option = "cachelast";
+  cfg.ptr = &tsCacheLastRow;
+  cfg.valType = TAOS_CFG_VTYPE_INT8;
+  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
+  cfg.minValue = TSDB_MIN_DB_CACHE_LAST_ROW;
+  cfg.maxValue = TSDB_MAX_DB_CACHE_LAST_ROW;
+  cfg.ptrLength = 0;
+  cfg.unitType = TAOS_CFG_UTYPE_NONE;
+  taosInitConfigOption(cfg);
+
   cfg.option = "mqttHostName";
   cfg.ptr = tsMqttHostName;
   cfg.valType = TAOS_CFG_VTYPE_STRING;

src/common/src/tvariant.c

@@ -74,7 +74,7 @@ void tVariantCreate(tVariant *pVar, SStrToken *token) {
 
     case TSDB_DATA_TYPE_BINARY: {
       pVar->pz = strndup(token->z, token->n);
-      pVar->nLen = strdequote(pVar->pz);
+      pVar->nLen = strRmquote(pVar->pz, token->n);
       break;
     }
     

src/connector/jdbc/src/test/java/com/taosdata/jdbc/TSDBPreparedStatementTest.java

@@ -595,7 +595,7 @@ public class TSDBPreparedStatementTest {
         stmt.execute("create database dbtest");
         Assert.assertThrows(SQLException.class, () -> stmt.execute("create database dbtest"));                
     }
-
+    
     @Test
     public void setBoolean() throws SQLException {
         // given

src/connector/jdbc/src/test/java/com/taosdata/jdbc/TSDBResultSetTest.java

@@ -177,7 +177,8 @@ public class TSDBResultSetTest {
         rs.getAsciiStream("f1");
     }
 
-    @Test(expected = SQLFeatureNotSupportedException.class)
+    @SuppressWarnings("deprecation")
+	@Test(expected = SQLFeatureNotSupportedException.class)
     public void getUnicodeStream() throws SQLException {
         rs.getUnicodeStream("f1");
     }

src/connector/python/taos/cinterface.py

@@ -242,7 +242,7 @@ def _load_taos_linux():
 
 
 def _load_taos_darwin():
-    return ctypes.cDLL('libtaos.dylib')
+    return ctypes.CDLL('libtaos.dylib')
 
 
 def _load_taos_windows():

src/cq/src/cqMain.c

@@ -38,21 +38,6 @@
 #define cDebug(...) { if (cqDebugFlag & DEBUG_DEBUG) { taosPrintLog("CQ  ", cqDebugFlag, __VA_ARGS__); }}
 #define cTrace(...) { if (cqDebugFlag & DEBUG_TRACE) { taosPrintLog("CQ  ", cqDebugFlag, __VA_ARGS__); }}
 
-typedef struct {
-  int32_t  vgId;
-  int32_t  master;
-  int32_t  num;      // number of continuous streams
-  char     user[TSDB_USER_LEN];
-  char     pass[TSDB_KEY_LEN];
-  char     db[TSDB_DB_NAME_LEN];
-  FCqWrite cqWrite;
-  struct SCqObj *pHead;
-  void    *dbConn;
-  void    *tmrCtrl;
-  pthread_mutex_t mutex;
-  int32_t delete;
-  int32_t cqObjNum;
-} SCqContext;
 
 typedef struct SCqObj {
   tmr_h          tmrId;
@@ -439,7 +424,7 @@ static void cqProcessCreateTimer(void *param, void *tmrId) {
 
 // inner implement in tscStream.c
 TAOS_STREAM *taos_open_stream_withname(TAOS *taos, const char* desName, const char *sqlstr, void (*fp)(void *param, TAOS_RES *, TAOS_ROW row),
-                              int64_t stime, void *param, void (*callback)(void *));
+                              int64_t stime, void *param, void (*callback)(void *), void* cqhandle);
 
 static void cqCreateStream(SCqContext *pContext, SCqObj *pObj) {
   pObj->pContext = pContext;
@@ -453,7 +438,8 @@ static void cqCreateStream(SCqContext *pContext, SCqObj *pObj) {
   pObj->tmrId = 0;
 
   if (pObj->pStream == NULL) {
-    pObj->pStream = taos_open_stream_withname(pContext->dbConn, pObj->dstTable, pObj->sqlStr, cqProcessStreamRes, INT64_MIN, (void *)pObj->rid, NULL);
+    pObj->pStream = taos_open_stream_withname(pContext->dbConn, pObj->dstTable, pObj->sqlStr, cqProcessStreamRes, \
+                                               INT64_MIN, (void *)pObj->rid, NULL, pContext);
 
     // TODO the pObj->pStream may be released if error happens
     if (pObj->pStream) {

src/inc/tcq.h

@@ -31,6 +31,23 @@ typedef struct {
   FCqWrite cqWrite;
 } SCqCfg;
 
+// SCqContext
+typedef struct {
+  int32_t  vgId;
+  int32_t  master;
+  int32_t  num;      // number of continuous streams
+  char     user[TSDB_USER_LEN];
+  char     pass[TSDB_KEY_LEN];
+  char     db[TSDB_DB_NAME_LEN];
+  FCqWrite cqWrite;
+  struct SCqObj *pHead;
+  void    *dbConn;
+  void    *tmrCtrl;
+  pthread_mutex_t mutex;
+  int32_t delete;
+  int32_t cqObjNum;
+} SCqContext;
+
 // the following API shall be called by vnode
 void *cqOpen(void *ahandle, const SCqCfg *pCfg);
 void  cqClose(void *handle);

src/inc/tsdb.h

@@ -94,7 +94,7 @@ STsdbRepo *tsdbOpenRepo(STsdbCfg *pCfg, STsdbAppH *pAppH);
 int        tsdbCloseRepo(STsdbRepo *repo, int toCommit);
 int32_t    tsdbConfigRepo(STsdbRepo *repo, STsdbCfg *pCfg);
 int        tsdbGetState(STsdbRepo *repo);
-
+bool       tsdbInCompact(STsdbRepo *repo);
 // --------- TSDB TABLE DEFINITION
 typedef struct {
   uint64_t uid;  // the unique table ID

src/kit/shell/src/shellEngine.c

@@ -398,7 +398,10 @@ static char* formatTimestamp(char* buf, int64_t val, int precision) {
 
   time_t tt;
   int32_t ms = 0;
-  if (precision == TSDB_TIME_PRECISION_MICRO) {
+  if (precision == TSDB_TIME_PRECISION_NANO) {
+    tt = (time_t)(val / 1000000000);
+    ms = val % 1000000000;
+  } else if (precision == TSDB_TIME_PRECISION_MICRO) {
     tt = (time_t)(val / 1000000);
     ms = val % 1000000;
   } else {
@@ -419,7 +422,9 @@ static char* formatTimestamp(char* buf, int64_t val, int precision) {
 #endif
   if (tt <= 0 && ms < 0) {
     tt--;
-    if (precision == TSDB_TIME_PRECISION_MICRO) {
+    if (precision == TSDB_TIME_PRECISION_NANO) {
+      ms += 1000000000;
+    } else if (precision == TSDB_TIME_PRECISION_MICRO) {
       ms += 1000000;
     } else {
       ms += 1000;
@@ -427,9 +432,11 @@ static char* formatTimestamp(char* buf, int64_t val, int precision) {
   }
 
   struct tm* ptm = localtime(&tt);
-  size_t pos = strftime(buf, 32, "%Y-%m-%d %H:%M:%S", ptm);
+  size_t pos = strftime(buf, 35, "%Y-%m-%d %H:%M:%S", ptm);
 
-  if (precision == TSDB_TIME_PRECISION_MICRO) {
+  if (precision == TSDB_TIME_PRECISION_NANO) {
+    sprintf(buf + pos, ".%09d", ms);
+  } else if (precision == TSDB_TIME_PRECISION_MICRO) {
     sprintf(buf + pos, ".%06d", ms);
   } else {
     sprintf(buf + pos, ".%03d", ms);
@@ -778,6 +785,8 @@ static int calcColWidth(TAOS_FIELD* field, int precision) {
     case TSDB_DATA_TYPE_TIMESTAMP:
       if (args.is_raw_time) {
         return MAX(14, width);
+      } if (precision == TSDB_TIME_PRECISION_NANO) {
+        return MAX(29, width);
       } else if (precision == TSDB_TIME_PRECISION_MICRO) {
         return MAX(26, width); // '2020-01-01 00:00:00.000000'
       } else {

src/kit/taosdemo/taosdemo.c

@@ -1213,7 +1213,6 @@ static void fetchResult(TAOS_RES *res, threadInfo* pThreadInfo) {
   }
 
   int   totalLen = 0;
-  char  temp[16000];
 
   // fetch the records row by row
   while((row = taos_fetch_row(res))) {
@@ -1224,6 +1223,7 @@ static void fetchResult(TAOS_RES *res, threadInfo* pThreadInfo) {
         memset(databuf, 0, 100*1024*1024);
     }
     num_rows++;
+    char temp[16000] = {0};
     int len = taos_print_row(temp, row, fields, num_fields);
     len += sprintf(temp + len, "\n");
     //printf("query result:%s\n", temp);
@@ -1852,7 +1852,9 @@ static void printfQueryMeta() {
 
 static char* formatTimestamp(char* buf, int64_t val, int precision) {
   time_t tt;
-  if (precision == TSDB_TIME_PRECISION_MICRO) {
+  if (precision == TSDB_TIME_PRECISION_NANO) {
+    tt = (time_t)(val / 1000000000);
+  } else if (precision == TSDB_TIME_PRECISION_MICRO) {
     tt = (time_t)(val / 1000000);
   } else {
     tt = (time_t)(val / 1000);
@@ -1873,7 +1875,9 @@ static char* formatTimestamp(char* buf, int64_t val, int precision) {
   struct tm* ptm = localtime(&tt);
   size_t pos = strftime(buf, 32, "%Y-%m-%d %H:%M:%S", ptm);
 
-  if (precision == TSDB_TIME_PRECISION_MICRO) {
+  if (precision == TSDB_TIME_PRECISION_NANO) {
+    sprintf(buf + pos, ".%09d", (int)(val % 1000000000));
+  } else if (precision == TSDB_TIME_PRECISION_MICRO) {
     sprintf(buf + pos, ".%06d", (int)(val % 1000000));
   } else {
     sprintf(buf + pos, ".%03d", (int)(val % 1000));
@@ -6253,9 +6257,11 @@ static void startMultiThreadInsertData(int threads, char* db_name,
   if (0 != precision[0]) {
     if (0 == strncasecmp(precision, "ms", 2)) {
       timePrec = TSDB_TIME_PRECISION_MILLI;
-    }  else if (0 == strncasecmp(precision, "us", 2)) {
+    } else if (0 == strncasecmp(precision, "us", 2)) {
       timePrec = TSDB_TIME_PRECISION_MICRO;
-    }  else {
+    } else if (0 == strncasecmp(precision, "ns", 2)) {
+      timePrec = TSDB_TIME_PRECISION_NANO;
+    } else {
       errorPrint("Not support precision: %s\n", precision);
       exit(-1);
     }

src/mnode/src/mnodeDb.c

@@ -820,8 +820,13 @@ static int32_t mnodeRetrieveDbs(SShowObj *pShow, char *data, int32_t rows, void
 #endif
 
     pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
-    char *prec = (pDb->cfg.precision == TSDB_TIME_PRECISION_MILLI) ? TSDB_TIME_PRECISION_MILLI_STR
-                                                                   : TSDB_TIME_PRECISION_MICRO_STR;
+    char *prec = NULL;
+    switch (pDb->cfg.precision) {
+      case TSDB_TIME_PRECISION_MILLI: prec = TSDB_TIME_PRECISION_MILLI_STR; break;
+      case TSDB_TIME_PRECISION_MICRO: prec = TSDB_TIME_PRECISION_MICRO_STR; break;
+      case TSDB_TIME_PRECISION_NANO:  prec = TSDB_TIME_PRECISION_NANO_STR;  break;
+      default: assert(false); break;
+    }
     STR_WITH_SIZE_TO_VARSTR(pWrite, prec, 2);
     cols++;
 

src/os/inc/osTime.h

@@ -55,6 +55,13 @@ static FORCE_INLINE int64_t taosGetTimestampUs() {
   return (int64_t)systemTime.tv_sec * 1000000L + (int64_t)systemTime.tv_usec;
 }
 
+//@return timestamp in nanosecond
+static FORCE_INLINE int64_t taosGetTimestampNs() {
+  struct timespec systemTime = {0};
+  clock_gettime(CLOCK_REALTIME, &systemTime);
+  return (int64_t)systemTime.tv_sec * 1000000000L + (int64_t)systemTime.tv_nsec;
+}
+
 /*
  * @return timestamp decided by global conf variable, tsTimePrecision
  * if precision == TSDB_TIME_PRECISION_MICRO, it returns timestamp in microsecond.
@@ -63,7 +70,9 @@ static FORCE_INLINE int64_t taosGetTimestampUs() {
 static FORCE_INLINE int64_t taosGetTimestamp(int32_t precision) {
   if (precision == TSDB_TIME_PRECISION_MICRO) {
     return taosGetTimestampUs();
-  } else {
+  } else if (precision == TSDB_TIME_PRECISION_NANO) {
+    return taosGetTimestampNs();
+  }else {
     return taosGetTimestampMs();
   }
 }
@@ -88,12 +97,13 @@ int64_t taosTimeAdd(int64_t t, int64_t duration, char unit, int32_t precision);
 int64_t taosTimeTruncate(int64_t t, const SInterval* pInterval, int32_t precision);
 int32_t taosTimeCountInterval(int64_t skey, int64_t ekey, int64_t interval, char unit, int32_t precision);
 
-int32_t parseAbsoluteDuration(char* token, int32_t tokenlen, int64_t* ts);
-int32_t parseNatualDuration(const char* token, int32_t tokenLen, int64_t* duration, char* unit);
+int32_t parseAbsoluteDuration(char* token, int32_t tokenlen, int64_t* ts, int32_t timePrecision);
+int32_t parseNatualDuration(const char* token, int32_t tokenLen, int64_t* duration, char* unit, int32_t timePrecision);
 
 int32_t taosParseTime(char* timestr, int64_t* time, int32_t len, int32_t timePrec, int8_t dayligth);
 void    deltaToUtcInitOnce();
 
+int64_t convertTimePrecision(int64_t time, int32_t fromPrecision, int32_t toPrecision);
 #ifdef __cplusplus
 }
 #endif

src/os/src/detail/osString.c

@@ -59,6 +59,9 @@ bool taosMbsToUcs4(char *mbs, size_t mbsLength, char *ucs4, int32_t ucs4_max_len
   iconv_close(cd);
   if (len != NULL) {
     *len = (int32_t)(ucs4_max_len - outLeft);
+    if (*len < 0) {
+      return false;
+    }
   }
 
   return true;

src/os/src/detail/osTime.c

@@ -14,7 +14,13 @@
  */
 
 #define _BSD_SOURCE
+
+#ifdef DARWIN
 #define _XOPEN_SOURCE
+#else
+#define _XOPEN_SOURCE 500
+#endif
+
 #define _DEFAULT_SOURCE
 
 #include "os.h"
@@ -119,8 +125,9 @@ int64_t parseFraction(char* str, char** end, int32_t timePrec) {
 
   const int32_t MILLI_SEC_FRACTION_LEN = 3;
   const int32_t MICRO_SEC_FRACTION_LEN = 6;
+  const int32_t NANO_SEC_FRACTION_LEN = 9;
 
-  int32_t factor[6] = {1, 10, 100, 1000, 10000, 100000};
+  int32_t factor[9] = {1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000};
   int32_t times = 1;
 
   while (str[i] >= '0' && str[i] <= '9') {
@@ -140,12 +147,17 @@ int64_t parseFraction(char* str, char** end, int32_t timePrec) {
     }
 
     times = MILLI_SEC_FRACTION_LEN - i;
-  } else {
-    assert(timePrec == TSDB_TIME_PRECISION_MICRO);
+  } else if (timePrec == TSDB_TIME_PRECISION_MICRO) {
     if (i >= MICRO_SEC_FRACTION_LEN) {
       i = MICRO_SEC_FRACTION_LEN;
     }
     times = MICRO_SEC_FRACTION_LEN - i;
+  } else {
+    assert(timePrec == TSDB_TIME_PRECISION_NANO);
+    if (i >= NANO_SEC_FRACTION_LEN) {
+      i = NANO_SEC_FRACTION_LEN;
+    }
+    times = NANO_SEC_FRACTION_LEN - i;
   }
 
   fraction = strnatoi(str, i) * factor[times];
@@ -202,7 +214,9 @@ int32_t parseTimezone(char* str, int64_t* tzOffset) {
  * 2013-04-12T15:52:01.123+0800
  */
 int32_t parseTimeWithTz(char* timestr, int64_t* time, int32_t timePrec) {
-  int64_t factor = (timePrec == TSDB_TIME_PRECISION_MILLI) ? 1000 : 1000000;
+
+  int64_t factor = (timePrec == TSDB_TIME_PRECISION_MILLI) ? 1000 :
+                             (timePrec == TSDB_TIME_PRECISION_MICRO ? 1000000 : 1000000000);
   int64_t tzOffset = 0;
 
   struct tm tm = {0};
@@ -287,7 +301,8 @@ int32_t parseLocaltime(char* timestr, int64_t* time, int32_t timePrec) {
     }
   }
 
-  int64_t factor = (timePrec == TSDB_TIME_PRECISION_MILLI) ? 1000 : 1000000;
+  int64_t factor = (timePrec == TSDB_TIME_PRECISION_MILLI) ? 1000 :
+                   (timePrec == TSDB_TIME_PRECISION_MICRO ? 1000000 : 1000000000);
   *time = factor * seconds + fraction;
 
   return 0;
@@ -315,37 +330,50 @@ int32_t parseLocaltimeWithDst(char* timestr, int64_t* time, int32_t timePrec) {
     }
   }
 
-  int64_t factor = (timePrec == TSDB_TIME_PRECISION_MILLI) ? 1000 : 1000000;
+  int64_t factor = (timePrec == TSDB_TIME_PRECISION_MILLI) ? 1000 :
+                   (timePrec == TSDB_TIME_PRECISION_MICRO ? 1000000 : 1000000000);
   *time = factor * seconds + fraction;
   return 0;
 }
 
-
-static int32_t getDurationInUs(int64_t val, char unit, int64_t* result) {
-  *result = val;
-
-  int64_t factor = 1000L;
+int64_t convertTimePrecision(int64_t time, int32_t fromPrecision, int32_t toPrecision) {
+  assert(fromPrecision == TSDB_TIME_PRECISION_MILLI ||
+         fromPrecision == TSDB_TIME_PRECISION_MICRO ||
+         fromPrecision == TSDB_TIME_PRECISION_NANO);
+  assert(toPrecision == TSDB_TIME_PRECISION_MILLI ||
+         toPrecision == TSDB_TIME_PRECISION_MICRO ||
+         toPrecision == TSDB_TIME_PRECISION_NANO);
+  static double factors[3][3] = { {1.,            1000.,            1000000.},
+                                  {1.0 / 1000,    1.,               1000.},
+                                  {1.0 / 1000000, 1.0 / 1000,       1.} };
+  return (int64_t)((double)time * factors[fromPrecision][toPrecision]);
+}
+static int32_t getDuration(int64_t val, char unit, int64_t* result, int32_t timePrecision) {
 
   switch (unit) {
     case 's':
-      (*result) *= MILLISECOND_PER_SECOND*factor;
+      (*result) = convertTimePrecision(val * MILLISECOND_PER_SECOND, TSDB_TIME_PRECISION_MILLI, timePrecision);
       break;
     case 'm':
-      (*result) *= MILLISECOND_PER_MINUTE*factor;
+      (*result) = convertTimePrecision(val * MILLISECOND_PER_MINUTE, TSDB_TIME_PRECISION_MILLI, timePrecision);
       break;
     case 'h':
-      (*result) *= MILLISECOND_PER_HOUR*factor;
+      (*result) = convertTimePrecision(val * MILLISECOND_PER_HOUR, TSDB_TIME_PRECISION_MILLI, timePrecision);
       break;
     case 'd':
-      (*result) *= MILLISECOND_PER_DAY*factor;
+      (*result) = convertTimePrecision(val * MILLISECOND_PER_DAY, TSDB_TIME_PRECISION_MILLI, timePrecision);
       break;
     case 'w':
-      (*result) *= MILLISECOND_PER_WEEK*factor;
+      (*result) = convertTimePrecision(val * MILLISECOND_PER_WEEK, TSDB_TIME_PRECISION_MILLI, timePrecision);
       break;
     case 'a':
-      (*result) *= factor;
+      (*result) = convertTimePrecision(val, TSDB_TIME_PRECISION_MILLI, timePrecision);
       break;
     case 'u':
+      (*result) = convertTimePrecision(val, TSDB_TIME_PRECISION_MICRO, timePrecision);
+      break;
+    case 'b':
+      (*result) = convertTimePrecision(val, TSDB_TIME_PRECISION_NANO, timePrecision);
       break;
     default: {
       return -1;
@@ -357,6 +385,8 @@ static int32_t getDurationInUs(int64_t val, char unit, int64_t* result) {
 }
 
 /*
+ * b - nanoseconds;
+ * u - microseconds;
  * a - Millionseconds
  * s - Seconds
  * m - Minutes
@@ -366,7 +396,7 @@ static int32_t getDurationInUs(int64_t val, char unit, int64_t* result) {
  * n - Months (30 days)
  * y - Years (365 days)
  */
-int32_t parseAbsoluteDuration(char* token, int32_t tokenlen, int64_t* duration) {
+int32_t parseAbsoluteDuration(char* token, int32_t tokenlen, int64_t* duration, int32_t timePrecision) {
   errno = 0;
   char* endPtr = NULL;
 
@@ -382,10 +412,10 @@ int32_t parseAbsoluteDuration(char* token, int32_t tokenlen, int64_t* duration)
     return -1;
   }
 
-  return getDurationInUs(timestamp, unit, duration);
+  return getDuration(timestamp, unit, duration, timePrecision);
 }
 
-int32_t parseNatualDuration(const char* token, int32_t tokenLen, int64_t* duration, char* unit) {
+int32_t parseNatualDuration(const char* token, int32_t tokenLen, int64_t* duration, char* unit, int32_t timePrecision) {
   errno = 0;
 
   /* get the basic numeric value */
@@ -399,7 +429,7 @@ int32_t parseNatualDuration(const char* token, int32_t tokenLen, int64_t* durati
     return 0;
   }
 
-  return getDurationInUs(*duration, *unit, duration);
+  return getDuration(*duration, *unit, duration, timePrecision);
 }
 
 int64_t taosTimeAdd(int64_t t, int64_t duration, char unit, int32_t precision) {

src/plugins/http/inc/httpJson.h

@@ -64,8 +64,8 @@ void httpJsonOriginString(JsonBuf* buf, char* sVal, int32_t len);
 void httpJsonStringForTransMean(JsonBuf* buf, char* SVal, int32_t maxLen);
 void httpJsonInt64(JsonBuf* buf, int64_t num);
 void httpJsonUInt64(JsonBuf* buf, uint64_t num);
-void httpJsonTimestamp(JsonBuf* buf, int64_t t, bool us);
-void httpJsonUtcTimestamp(JsonBuf* buf, int64_t t, bool us);
+void httpJsonTimestamp(JsonBuf* buf, int64_t t, int32_t timePrecision);
+void httpJsonUtcTimestamp(JsonBuf* buf, int64_t t, int32_t timePrecision);
 void httpJsonInt(JsonBuf* buf, int32_t num);
 void httpJsonUInt(JsonBuf* buf, uint32_t num);
 void httpJsonFloat(JsonBuf* buf, float num);

src/plugins/http/src/httpJson.c

@@ -262,42 +262,92 @@ void httpJsonUInt64(JsonBuf* buf, uint64_t num) {
   buf->lst += snprintf(buf->lst, MAX_NUM_STR_SZ, "%" PRIu64, num);
 }
 
-void httpJsonTimestamp(JsonBuf* buf, int64_t t, bool us) {
+void httpJsonTimestamp(JsonBuf* buf, int64_t t, int32_t timePrecision) {
   char       ts[35] = {0};
   struct tm* ptm;
-  int32_t    precision = 1000;
-  if (us) {
-    precision = 1000000;
+
+  int32_t fractionLen;
+  char* format = NULL;
+  time_t quot = 0;
+  long mod = 0;
+
+  switch (timePrecision) {
+    case TSDB_TIME_PRECISION_MILLI: {
+      quot = t / 1000;
+      fractionLen = 5;
+      format = ".%03" PRId64;
+      mod = t % 1000;
+      break;
+    }
+
+    case TSDB_TIME_PRECISION_MICRO: {
+      quot = t / 1000000;
+      fractionLen = 8;
+      format = ".%06" PRId64;
+      mod = t % 1000000;
+      break;
+    }
+
+    case TSDB_TIME_PRECISION_NANO: {
+      quot = t / 1000000000;
+      fractionLen = 11;
+      format = ".%09" PRId64;
+      mod = t % 1000000000;
+      break;
+    }
+
+    default:
+      assert(false);
   }
 
-  time_t tt = t / precision;
-  ptm = localtime(&tt);
+  ptm = localtime(&quot);
   int32_t length = (int32_t)strftime(ts, 35, "%Y-%m-%d %H:%M:%S", ptm);
-  if (us) {
-    length += snprintf(ts + length, 8, ".%06" PRId64, t % precision);
-  } else {
-    length += snprintf(ts + length, 5, ".%03" PRId64, t % precision);
-  }
+  length += snprintf(ts + length, fractionLen, format, mod);
 
   httpJsonString(buf, ts, length);
 }
 
-void httpJsonUtcTimestamp(JsonBuf* buf, int64_t t, bool us) {
+void httpJsonUtcTimestamp(JsonBuf* buf, int64_t t, int32_t timePrecision) {
   char       ts[40] = {0};
   struct tm* ptm;
-  int32_t    precision = 1000;
-  if (us) {
-    precision = 1000000;
+
+  int32_t fractionLen;
+  char* format = NULL;
+  time_t quot = 0;
+  long mod = 0;
+
+  switch (timePrecision) {
+    case TSDB_TIME_PRECISION_MILLI: {
+      quot = t / 1000;
+      fractionLen = 5;
+      format = ".%03" PRId64;
+      mod = t % 1000;
+      break;
+    }
+
+    case TSDB_TIME_PRECISION_MICRO: {
+      quot = t / 1000000;
+      fractionLen = 8;
+      format = ".%06" PRId64;
+      mod = t % 1000000;
+      break;
+    }
+
+    case TSDB_TIME_PRECISION_NANO: {
+      quot = t / 1000000000;
+      fractionLen = 11;
+      format = ".%09" PRId64;
+      mod = t % 1000000000;
+      break;
+    }
+
+    default:
+      assert(false);
   }
 
-  time_t tt = t / precision;
-  ptm = localtime(&tt);
+  ptm = localtime(&quot);
   int32_t length = (int32_t)strftime(ts, 40, "%Y-%m-%dT%H:%M:%S", ptm);
-  if (us) {
-    length += snprintf(ts + length, 8, ".%06" PRId64, t % precision);
-  } else {
-    length += snprintf(ts + length, 5, ".%03" PRId64, t % precision);
-  }
+  length += snprintf(ts + length, fractionLen, format, mod);
   length += (int32_t)strftime(ts + length, 40 - length, "%z", ptm);
 
   httpJsonString(buf, ts, length);

src/plugins/http/src/httpRestJson.c

@@ -186,13 +186,11 @@ bool restBuildSqlJson(HttpContext *pContext, HttpSqlCmd *cmd, TAOS_RES *result,
           break;
         case TSDB_DATA_TYPE_TIMESTAMP:
           if (timestampFormat == REST_TIMESTAMP_FMT_LOCAL_STRING) {
-            httpJsonTimestamp(jsonBuf, *((int64_t *)row[i]),
-                              taos_result_precision(result) == TSDB_TIME_PRECISION_MICRO);
+            httpJsonTimestamp(jsonBuf, *((int64_t *)row[i]), taos_result_precision(result));
           } else if (timestampFormat == REST_TIMESTAMP_FMT_TIMESTAMP) {
             httpJsonInt64(jsonBuf, *((int64_t *)row[i]));
           } else {
-            httpJsonUtcTimestamp(jsonBuf, *((int64_t *)row[i]),
-                                 taos_result_precision(result) == TSDB_TIME_PRECISION_MICRO);
+            httpJsonUtcTimestamp(jsonBuf, *((int64_t *)row[i]), taos_result_precision(result));
           }
           break;
         default:

src/query/inc/qExecutor.h

@@ -464,6 +464,7 @@ typedef struct SSWindowOperatorInfo {
   TSKEY          prevTs;     // previous timestamp
   int32_t        numOfRows;  // number of rows
   int32_t        start;      // start row index
+  bool           reptScan;    // next round scan
 } SSWindowOperatorInfo;
 
 typedef struct SStateWindowOperatorInfo {
@@ -473,7 +474,7 @@ typedef struct SStateWindowOperatorInfo {
   int32_t        colIndex;      // start row index
   int32_t        start;
   char*          prevData;    // previous data 
-   
+  bool           reptScan;
 } SStateWindowOperatorInfo ;
 
 typedef struct SDistinctOperatorInfo {

src/query/inc/qSqlparser.h

@@ -46,7 +46,7 @@ enum SQL_NODE_FROM_TYPE {
 
 enum SQL_EXPR_FLAG {
   EXPR_FLAG_TS_ERROR = 1,
-  EXPR_FLAG_US_TIMESTAMP = 2,
+  EXPR_FLAG_NS_TIMESTAMP = 2,
   EXPR_FLAG_TIMESTAMP_VAR = 3,
 };
 

src/query/inc/sql.y

@@ -559,10 +559,8 @@ session_option(X) ::= SESSION LP ids(V) cpxName(Z) COMMA tmvar(Y) RP.    {
    X.gap = Y;
 }
 %type windowstate_option {SWindowStateVal}
-windowstate_option(X) ::= .                                                  {X.col.n = 0;}
-windowstate_option(X) ::= STATE_WINDOW LP ids(V) RP.                       {
-   X.col = V;
-}  
+windowstate_option(X) ::= .                                                { X.col.n = 0; X.col.z = NULL;}
+windowstate_option(X) ::= STATE_WINDOW LP ids(V) RP.                       { X.col = V; }
 
 %type fill_opt {SArray*}
 %destructor fill_opt {taosArrayDestroy($$);}

src/query/src/qAggMain.c

@@ -3428,7 +3428,7 @@ static bool deriv_function_setup(SQLFunctionCtx *pCtx) {
   SResultRowCellInfo *pResInfo = GET_RES_INFO(pCtx);
   SDerivInfo* pDerivInfo = GET_ROWCELL_INTERBUF(pResInfo);
 
-  pDerivInfo->ignoreNegative = pCtx->param[2].i64;
+  pDerivInfo->ignoreNegative = pCtx->param[1].i64;
   pDerivInfo->prevTs   = -1;
   pDerivInfo->tsWindow = pCtx->param[0].i64;
   pDerivInfo->valueSet = false;
@@ -3440,10 +3440,8 @@ static void deriv_function(SQLFunctionCtx *pCtx) {
   SDerivInfo* pDerivInfo = GET_ROWCELL_INTERBUF(pResInfo);
 
   void *data = GET_INPUT_DATA_LIST(pCtx);
-  bool  isFirstBlock = (pDerivInfo->valueSet == false);
 
   int32_t notNullElems = 0;
-
   int32_t step = GET_FORWARD_DIRECTION_FACTOR(pCtx->order);
   int32_t i = (pCtx->order == TSDB_ORDER_ASC) ? 0 : pCtx->size - 1;
 
@@ -3469,12 +3467,12 @@ static void deriv_function(SQLFunctionCtx *pCtx) {
             *pTimestamp = tsList[i];
             pOutput    += 1;
             pTimestamp += 1;
+            notNullElems++;
           }
         }
 
         pDerivInfo->prevValue = pData[i];
         pDerivInfo->prevTs    = tsList[i];
-        notNullElems++;
       }
 
       break;
@@ -3496,12 +3494,12 @@ static void deriv_function(SQLFunctionCtx *pCtx) {
             *pTimestamp = tsList[i];
             pOutput    += 1;
             pTimestamp += 1;
+            notNullElems++;
           }
         }
 
         pDerivInfo->prevValue = (double) pData[i];
         pDerivInfo->prevTs    = tsList[i];
-        notNullElems++;
       }
       break;
     }
@@ -3522,12 +3520,12 @@ static void deriv_function(SQLFunctionCtx *pCtx) {
             *pTimestamp = tsList[i];
             pOutput    += 1;
             pTimestamp += 1;
+            notNullElems++;
           }
         }
 
         pDerivInfo->prevValue = pData[i];
         pDerivInfo->prevTs    = tsList[i];
-        notNullElems++;
       }
       break;
     }
@@ -3549,12 +3547,12 @@ static void deriv_function(SQLFunctionCtx *pCtx) {
             *pTimestamp = tsList[i];
             pOutput    += 1;
             pTimestamp += 1;
+            notNullElems++;
           }
         }
 
         pDerivInfo->prevValue = pData[i];
         pDerivInfo->prevTs    = tsList[i];
-        notNullElems++;
       }
       break;
     }
@@ -3575,12 +3573,12 @@ static void deriv_function(SQLFunctionCtx *pCtx) {
             *pTimestamp = tsList[i];
             pOutput    += 1;
             pTimestamp += 1;
+            notNullElems++;
           }
         }
 
         pDerivInfo->prevValue = pData[i];
         pDerivInfo->prevTs    = tsList[i];
-        notNullElems++;
       }
       break;
     }
@@ -3602,12 +3600,12 @@ static void deriv_function(SQLFunctionCtx *pCtx) {
 
             pOutput    += 1;
             pTimestamp += 1;
+            notNullElems++;
           }
         }
 
         pDerivInfo->prevValue = pData[i];
         pDerivInfo->prevTs    = tsList[i];
-        notNullElems++;
       }
       break;
     }
@@ -3623,8 +3621,7 @@ static void deriv_function(SQLFunctionCtx *pCtx) {
      */
     assert(pCtx->hasNull);
   } else {
-    int32_t forwardStep = (isFirstBlock) ? notNullElems - 1 : notNullElems;
-    GET_RES_INFO(pCtx)->numOfRes += forwardStep;
+    GET_RES_INFO(pCtx)->numOfRes += notNullElems;
   }
 }
 
@@ -4687,8 +4684,8 @@ static bool rate_function_setup(SQLFunctionCtx *pCtx) {
   pInfo->correctionValue = 0;
   pInfo->firstKey    = INT64_MIN;
   pInfo->lastKey     = INT64_MIN;
-  pInfo->firstValue  = INT64_MIN;
-  pInfo->lastValue   = INT64_MIN;
+  pInfo->firstValue  = (double) INT64_MIN;
+  pInfo->lastValue   = (double) INT64_MIN;
 
   pInfo->hasResult = 0;
   pInfo->isIRate = (pCtx->functionId == TSDB_FUNC_IRATE);
@@ -5003,6 +5000,19 @@ void generateBlockDistResult(STableBlockDist *pTableBlockDist, char* result) {
   min = totalBlocks > 0 ? pTableBlockDist->minRows : 0;
   max = totalBlocks > 0 ? pTableBlockDist->maxRows : 0;
 
+  double stdDev = 0;
+  if (totalBlocks > 0) {
+    double variance = 0;
+    for (int32_t i = 0; i < numSteps; i++) {
+      SFileBlockInfo *blockInfo = taosArrayGet(blockInfos, i);
+      int64_t         blocks = blockInfo->numBlocksOfStep;
+      int32_t         rows = (i * TSDB_BLOCK_DIST_STEP_ROWS + TSDB_BLOCK_DIST_STEP_ROWS / 2);
+      variance += blocks * (rows - avg) * (rows - avg);
+    }
+    variance = variance / totalBlocks;
+    stdDev = sqrt(variance);
+  }
+
   double percents[] = {0.05, 0.10, 0.20, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90, 0.95, 0.99};
   int32_t percentiles[] = {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1};
   assert(sizeof(percents)/sizeof(double) == sizeof(percentiles)/sizeof(int32_t));
@@ -5017,12 +5027,12 @@ void generateBlockDistResult(STableBlockDist *pTableBlockDist, char* result) {
                    "60th=[%d], 70th=[%d], 80th=[%d], 90th=[%d], 95th=[%d], 99th=[%d]\n\t "
                    "Min=[%"PRId64"(Rows)] Max=[%"PRId64"(Rows)] Avg=[%"PRId64"(Rows)] Stddev=[%.2f] \n\t "
                    "Rows=[%"PRIu64"], Blocks=[%"PRId64"], Size=[%.3f(Kb)] Comp=[%.2f]\n\t "
-                   "RowsInMem=[%d] \n\t SeekHeaderTime=[%d(us)]",
+                   "RowsInMem=[%d] \n\t",
                    percentiles[0], percentiles[1], percentiles[2], percentiles[3], percentiles[4], percentiles[5],
                    percentiles[6], percentiles[7], percentiles[8], percentiles[9], percentiles[10], percentiles[11],
-                   min, max, avg, 0.0,
+                   min, max, avg, stdDev,
                    totalRows, totalBlocks, totalLen/1024.0, compRatio,
-                   pTableBlockDist->numOfRowsInMemTable, pTableBlockDist->firstSeekTimeUs);
+                   pTableBlockDist->numOfRowsInMemTable);
   varDataSetLen(result, sz);
   UNUSED(sz);
 }
@@ -5290,7 +5300,7 @@ SAggFunctionInfo aAggs[] = {{
                           },
                           {
                               // 17
-                              "ts_dummy",
+                              "ts",
                               TSDB_FUNC_TS_DUMMY,
                               TSDB_FUNC_TS_DUMMY,
                               TSDB_BASE_FUNC_SO | TSDB_FUNCSTATE_NEED_TS,
@@ -5384,7 +5394,7 @@ SAggFunctionInfo aAggs[] = {{
                               "diff",
                               TSDB_FUNC_DIFF,
                               TSDB_FUNC_INVALID_ID,
-                              TSDB_FUNCSTATE_MO | TSDB_FUNCSTATE_STABLE | TSDB_FUNCSTATE_NEED_TS,
+                              TSDB_FUNCSTATE_MO | TSDB_FUNCSTATE_STABLE | TSDB_FUNCSTATE_NEED_TS | TSDB_FUNCSTATE_SELECTIVITY,
                               diff_function_setup,
                               diff_function,
                               diff_function_f,
@@ -5488,7 +5498,7 @@ SAggFunctionInfo aAggs[] = {{
                               "derivative",   // return table id and the corresponding tags for join match and subscribe
                               TSDB_FUNC_DERIVATIVE,
                               TSDB_FUNC_INVALID_ID,
-                              TSDB_FUNCSTATE_MO | TSDB_FUNCSTATE_STABLE | TSDB_FUNCSTATE_NEED_TS,
+                              TSDB_FUNCSTATE_MO | TSDB_FUNCSTATE_STABLE | TSDB_FUNCSTATE_NEED_TS | TSDB_FUNCSTATE_SELECTIVITY,
                               deriv_function_setup,
                               deriv_function,
                               noop2,

src/query/src/qExecutor.c

@@ -30,6 +30,7 @@
 
 #define IS_MASTER_SCAN(runtime)        ((runtime)->scanFlag == MASTER_SCAN)
 #define IS_REVERSE_SCAN(runtime)       ((runtime)->scanFlag == REVERSE_SCAN)
+#define IS_REPEAT_SCAN(runtime)        ((runtime)->scanFlag == REPEAT_SCAN) 
 #define SET_MASTER_SCAN_FLAG(runtime)  ((runtime)->scanFlag = MASTER_SCAN)
 #define SET_REVERSE_SCAN_FLAG(runtime) ((runtime)->scanFlag = REVERSE_SCAN)
 
@@ -130,10 +131,10 @@ static void getNextTimeWindow(SQueryAttr* pQueryAttr, STimeWindow* tw) {
     return;
   }
 
-  int64_t key = tw->skey / 1000, interval = pQueryAttr->interval.interval;
-  if (pQueryAttr->precision == TSDB_TIME_PRECISION_MICRO) {
-    key /= 1000;
-  }
+  int64_t key = tw->skey, interval = pQueryAttr->interval.interval;
+  //convert key to second
+  key = convertTimePrecision(key, pQueryAttr->precision, TSDB_TIME_PRECISION_MILLI) / 1000;
+
   if (pQueryAttr->interval.intervalUnit == 'y') {
     interval *= 12;
   }
@@ -145,17 +146,13 @@ static void getNextTimeWindow(SQueryAttr* pQueryAttr, STimeWindow* tw) {
   int mon = (int)(tm.tm_year * 12 + tm.tm_mon + interval * factor);
   tm.tm_year = mon / 12;
   tm.tm_mon = mon % 12;
-  tw->skey = mktime(&tm) * 1000L;
+  tw->skey = convertTimePrecision(mktime(&tm) * 1000L, TSDB_TIME_PRECISION_MILLI, pQueryAttr->precision);
 
   mon = (int)(mon + interval);
   tm.tm_year = mon / 12;
   tm.tm_mon = mon % 12;
-  tw->ekey = mktime(&tm) * 1000L;
+  tw->ekey = convertTimePrecision(mktime(&tm) * 1000L, TSDB_TIME_PRECISION_MILLI, pQueryAttr->precision);
 
-  if (pQueryAttr->precision == TSDB_TIME_PRECISION_MICRO) {
-    tw->skey *= 1000L;
-    tw->ekey *= 1000L;
-  }
   tw->ekey -= 1;
 }
 
@@ -735,6 +732,7 @@ static void doApplyFunctions(SQueryRuntimeEnv* pRuntimeEnv, SQLFunctionCtx* pCtx
     if (pCtx[k].preAggVals.isSet && forwardStep < numOfTotal) {
       pCtx[k].preAggVals.isSet = false;
     }
+
     if (functionNeedToExecute(pRuntimeEnv, &pCtx[k], functionId)) {
       aAggs[functionId].xFunction(&pCtx[k]);
     }
@@ -918,7 +916,7 @@ void setInputDataBlock(SOperatorInfo* pOperator, SQLFunctionCtx* pCtx, SSDataBlo
       doSetInputDataBlockInfo(pOperator, pCtx, pBlock, order);
     }
   } else {
-    if (pCtx[0].pInput == NULL && pBlock->pDataBlock != NULL) {
+    if (/*pCtx[0].pInput == NULL && */pBlock->pDataBlock != NULL) {
       doSetInputDataBlock(pOperator, pCtx, pBlock, order);
     } else {
       doSetInputDataBlockInfo(pOperator, pCtx, pBlock, order);
@@ -1169,7 +1167,7 @@ static void hashIntervalAgg(SOperatorInfo* pOperatorInfo, SResultRowInfo* pResul
 
   SQueryRuntimeEnv* pRuntimeEnv = pOperatorInfo->pRuntimeEnv;
   int32_t           numOfOutput = pOperatorInfo->numOfOutput;
-  SQueryAttr*           pQueryAttr = pRuntimeEnv->pQueryAttr;
+  SQueryAttr*       pQueryAttr = pRuntimeEnv->pQueryAttr;
 
   int32_t step = GET_FORWARD_DIRECTION_FACTOR(pQueryAttr->order.order);
   bool ascQuery = QUERY_IS_ASC_QUERY(pQueryAttr);
@@ -1336,6 +1334,10 @@ static void doSessionWindowAggImpl(SOperatorInfo* pOperator, SSWindowOperatorInf
 
   int64_t gap = pOperator->pRuntimeEnv->pQueryAttr->sw.gap;
   pInfo->numOfRows = 0;
+  if (IS_REPEAT_SCAN(pRuntimeEnv) && !pInfo->reptScan) {
+    pInfo->reptScan = true;
+    pInfo->prevTs = INT64_MIN;
+  }
 
   TSKEY* tsList = (TSKEY*)pColInfoData->pData;
   for (int32_t j = 0; j < pSDataBlock->info.rows; ++j) {
@@ -1345,7 +1347,7 @@ static void doSessionWindowAggImpl(SOperatorInfo* pOperator, SSWindowOperatorInf
       pInfo->prevTs = tsList[j];
       pInfo->numOfRows = 1;
       pInfo->start = j;
-    } else if (tsList[j] - pInfo->prevTs <= gap) {
+    } else if (tsList[j] - pInfo->prevTs <= gap && (tsList[j] - pInfo->prevTs) >= 0) {
       pInfo->curWindow.ekey = tsList[j];
       pInfo->prevTs = tsList[j];
       pInfo->numOfRows += 1;
@@ -1681,8 +1683,6 @@ static int32_t setupQueryRuntimeEnv(SQueryRuntimeEnv *pRuntimeEnv, int32_t numOf
   SQueryAttr *pQueryAttr = pRuntimeEnv->pQueryAttr;
 
   pRuntimeEnv->prevGroupId = INT32_MIN;
-  pRuntimeEnv->enableGroupData = false;
-
   pRuntimeEnv->pQueryAttr = pQueryAttr;
 
   pRuntimeEnv->pResultRowHashTable = taosHashInit(numOfTables, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), true, HASH_NO_LOCK);
@@ -3094,7 +3094,7 @@ int32_t initResultRow(SResultRow *pResultRow) {
  * +------------+-----------------result column 1-----------+-----------------result column 2-----------+
  * + SResultRow | SResultRowCellInfo | intermediate buffer1 | SResultRowCellInfo | intermediate buffer 2|
  * +------------+-------------------------------------------+-------------------------------------------+
- *           offset[0]                                  offset[1]
+ *           offset[0]                                  offset[1]                                   offset[2]
  */
 void setDefaultOutputBuf(SQueryRuntimeEnv *pRuntimeEnv, SOptrBasicInfo *pInfo, int64_t uid, int32_t stage) {
   SQLFunctionCtx* pCtx           = pInfo->pCtx;
@@ -3323,7 +3323,7 @@ void setResultRowOutputBufInitCtx(SQueryRuntimeEnv *pRuntimeEnv, SResultRow *pRe
     offset += pCtx[i].outputBytes;
 
     int32_t functionId = pCtx[i].functionId;
-    if (functionId == TSDB_FUNC_TOP || functionId == TSDB_FUNC_BOTTOM || functionId == TSDB_FUNC_DIFF) {
+    if (functionId == TSDB_FUNC_TOP || functionId == TSDB_FUNC_BOTTOM || functionId == TSDB_FUNC_DIFF || functionId == TSDB_FUNC_DERIVATIVE) {
       pCtx[i].ptsOutputBuf = pCtx[0].pOutput;
     }
 
@@ -3381,7 +3381,7 @@ void setResultOutputBuf(SQueryRuntimeEnv *pRuntimeEnv, SResultRow *pResult, SQLF
     offset += pCtx[i].outputBytes;
 
     int32_t functionId = pCtx[i].functionId;
-    if (functionId == TSDB_FUNC_TOP || functionId == TSDB_FUNC_BOTTOM || functionId == TSDB_FUNC_DIFF) {
+    if (functionId == TSDB_FUNC_TOP || functionId == TSDB_FUNC_BOTTOM || functionId == TSDB_FUNC_DIFF || functionId == TSDB_FUNC_DERIVATIVE) {
       pCtx[i].ptsOutputBuf = pCtx[0].pOutput;
     }
 
@@ -3589,6 +3589,8 @@ static int32_t doCopyToSDataBlock(SQueryRuntimeEnv* pRuntimeEnv, SGroupResInfo*
   int32_t step = -1;
 
   qDebug("QInfo:0x%"PRIx64" start to copy data from windowResInfo to output buf", GET_QID(pRuntimeEnv));
+  assert(orderType == TSDB_ORDER_ASC || orderType == TSDB_ORDER_DESC);
+
   if (orderType == TSDB_ORDER_ASC) {
     start = pGroupResInfo->index;
     step = 1;
@@ -4115,6 +4117,7 @@ int32_t doInitQInfo(SQInfo* pQInfo, STSBuf* pTsBuf, void* tsdb, void* sourceOptr
   pQueryAttr->interBufSize = getOutputInterResultBufSize(pQueryAttr);
 
   pRuntimeEnv->groupResInfo.totalGroup = (int32_t) (pQueryAttr->stableQuery? GET_NUM_OF_TABLEGROUP(pRuntimeEnv):0);
+  pRuntimeEnv->enableGroupData = false;
 
   pRuntimeEnv->pQueryAttr = pQueryAttr;
   pRuntimeEnv->pTsBuf = pTsBuf;
@@ -4570,7 +4573,7 @@ SOperatorInfo* createDataBlocksOptScanInfo(void* pTsdbQueryHandle, SQueryRuntime
 }
 
 SArray* getOrderCheckColumns(SQueryAttr* pQuery) {
-  int32_t numOfCols = pQuery->pGroupbyExpr->numOfGroupCols;
+  int32_t numOfCols = pQuery->pGroupbyExpr == NULL? 0: pQuery->pGroupbyExpr->numOfGroupCols;
 
   SArray* pOrderColumns = NULL;
   if (numOfCols > 0) {
@@ -4609,7 +4612,7 @@ SArray* getOrderCheckColumns(SQueryAttr* pQuery) {
 }
 
 SArray* getResultGroupCheckColumns(SQueryAttr* pQuery) {
-  int32_t numOfCols = pQuery->pGroupbyExpr->numOfGroupCols;
+  int32_t numOfCols = pQuery->pGroupbyExpr == NULL? 0 : pQuery->pGroupbyExpr->numOfGroupCols;
 
   SArray* pOrderColumns = NULL;
   if (numOfCols > 0) {
@@ -5175,6 +5178,10 @@ static void doStateWindowAggImpl(SOperatorInfo* pOperator, SStateWindowOperatorI
 
   SColumnInfoData* pTsColInfoData = taosArrayGet(pSDataBlock->pDataBlock, 0);
   TSKEY* tsList = (TSKEY*)pTsColInfoData->pData;
+  if (IS_REPEAT_SCAN(pRuntimeEnv) && !pInfo->reptScan) {
+    pInfo->reptScan = true;
+    tfree(pInfo->prevData); 
+  }
 
   pInfo->numOfRows = 0;
   for (int32_t j = 0; j < pSDataBlock->info.rows; ++j) {
@@ -5761,6 +5768,7 @@ SOperatorInfo* createTimeIntervalOperatorInfo(SQueryRuntimeEnv* pRuntimeEnv, SOp
 SOperatorInfo* createStatewindowOperatorInfo(SQueryRuntimeEnv* pRuntimeEnv, SOperatorInfo* upstream, SExprInfo* pExpr, int32_t numOfOutput) {
   SStateWindowOperatorInfo* pInfo = calloc(1, sizeof(SStateWindowOperatorInfo));
   pInfo->colIndex   = -1;
+  pInfo->reptScan   = false;
   pInfo->binfo.pCtx = createSQLFunctionCtx(pRuntimeEnv, pExpr, numOfOutput, &pInfo->binfo.rowCellInfoOffset);
   pInfo->binfo.pRes = createOutputBuf(pExpr, numOfOutput, pRuntimeEnv->resultInfo.capacity);
   initResultRowInfo(&pInfo->binfo.resultRowInfo, 8, TSDB_DATA_TYPE_INT);
@@ -5788,7 +5796,8 @@ SOperatorInfo* createSWindowOperatorInfo(SQueryRuntimeEnv* pRuntimeEnv, SOperato
   pInfo->binfo.pRes = createOutputBuf(pExpr, numOfOutput, pRuntimeEnv->resultInfo.capacity);
   initResultRowInfo(&pInfo->binfo.resultRowInfo, 8, TSDB_DATA_TYPE_INT);
 
-  pInfo->prevTs = INT64_MIN;
+  pInfo->prevTs   = INT64_MIN;
+  pInfo->reptScan = false; 
   SOperatorInfo* pOperator = calloc(1, sizeof(SOperatorInfo));
 
   pOperator->name         = "SessionWindowAggOperator";
@@ -7213,7 +7222,7 @@ SQInfo* createQInfoImpl(SQueryTableMsg* pQueryMsg, SGroupbyExpr* pGroupbyExpr, S
   // todo refactor
   pQInfo->query.queryBlockDist = (numOfOutput == 1 && pExprs[0].base.functionId == TSDB_FUNC_BLKINFO);
 
-  qDebug("qmsg:%p QInfo:0x%" PRIx64 "-%p created", pQueryMsg, pQInfo->qId, pQInfo);
+  qDebug("qmsg:%p vgId:%d, QInfo:0x%" PRIx64 "-%p created", pQueryMsg, pQInfo->query.vgId, pQInfo->qId, pQInfo);
   return pQInfo;
 
 _cleanup_qinfo:

src/query/src/qSqlParser.c

@@ -139,19 +139,20 @@ tSqlExpr *tSqlExprCreateIdValue(SStrToken *pToken, int32_t optrType) {
     pSqlExpr->tokenId = optrType;
     pSqlExpr->type    = SQL_NODE_VALUE;
   } else if (optrType == TK_NOW) {
-    // use microsecond by default
-    pSqlExpr->value.i64 = taosGetTimestamp(TSDB_TIME_PRECISION_MICRO);
+    // use nanosecond by default TODO set value after getting database precision
+    pSqlExpr->value.i64 = taosGetTimestamp(TSDB_TIME_PRECISION_NANO);
     pSqlExpr->value.nType = TSDB_DATA_TYPE_BIGINT;
     pSqlExpr->tokenId = TK_TIMESTAMP;  // TK_TIMESTAMP used to denote the time value is in microsecond
     pSqlExpr->type    = SQL_NODE_VALUE;
-    pSqlExpr->flags  |= 1 << EXPR_FLAG_US_TIMESTAMP;
+    pSqlExpr->flags  |= 1 << EXPR_FLAG_NS_TIMESTAMP;
   } else if (optrType == TK_VARIABLE) {
-    int32_t ret = parseAbsoluteDuration(pToken->z, pToken->n, &pSqlExpr->value.i64);
+    // use nanosecond by default TODO set value after getting database precision
+    int32_t ret = parseAbsoluteDuration(pToken->z, pToken->n, &pSqlExpr->value.i64, TSDB_TIME_PRECISION_NANO);
     if (ret != TSDB_CODE_SUCCESS) {
       terrno = TSDB_CODE_TSC_SQL_SYNTAX_ERROR;
     }
 
-    pSqlExpr->flags  |= 1 << EXPR_FLAG_US_TIMESTAMP;
+    pSqlExpr->flags  |= 1 << EXPR_FLAG_NS_TIMESTAMP;
     pSqlExpr->flags  |= 1 << EXPR_FLAG_TIMESTAMP_VAR;
     pSqlExpr->value.nType = TSDB_DATA_TYPE_BIGINT;
     pSqlExpr->tokenId = TK_TIMESTAMP;

src/query/src/queryMain.c

@@ -132,7 +132,7 @@ int32_t qCreateQueryInfo(void* tsdb, int32_t vgId, SQueryTableMsg* pQueryMsg, qi
         numOfGroupByCols = 0;
       }
 
-      qDebug("qmsg:%p query stable, uid:%"PRId64", tid:%d", pQueryMsg, id->uid, id->tid);
+      qDebug("qmsg:%p query stable, uid:%"PRIu64", tid:%d", pQueryMsg, id->uid, id->tid);
       code = tsdbQuerySTableByTagCond(tsdb, id->uid, pQueryMsg->window.skey, param.tagCond, pQueryMsg->tagCondLen,
                                       pQueryMsg->tagNameRelType, param.tbnameCond, &tableGroupInfo, param.pGroupColIndex, numOfGroupByCols);
 
@@ -162,7 +162,7 @@ int32_t qCreateQueryInfo(void* tsdb, int32_t vgId, SQueryTableMsg* pQueryMsg, qi
 
   assert(pQueryMsg->stableQuery == isSTableQuery);
   (*pQInfo) = createQInfoImpl(pQueryMsg, param.pGroupbyExpr, param.pExprs, param.pSecExprs, &tableGroupInfo,
-      param.pTagColumnInfo, vgId, param.sql, qId);
+                              param.pTagColumnInfo, vgId, param.sql, qId);
 
   param.sql    = NULL;
   param.pExprs = NULL;

src/tsdb/inc/tsdbint.h

@@ -92,6 +92,7 @@ struct STsdbRepo {
   pthread_mutex_t mutex;
   bool            repoLocked;
   int32_t         code;  // Commit code
+  bool            inCompact;  // is in compact process?
 };
 
 #define REPO_ID(r) (r)->config.tsdbId

src/tsdb/src/tsdbCompact.c

@@ -12,11 +12,516 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
-#include "tsdb.h"
+#include "tsdbint.h"
 
 #ifndef _TSDB_PLUGINS
 
-int   tsdbCompact(STsdbRepo *pRepo) { return 0; }
-void *tsdbCompactImpl(STsdbRepo *pRepo) { return NULL; }
+typedef struct {
+  STable *    pTable;
+  SBlockIdx * pBlkIdx;
+  SBlockIdx   bindex;
+  SBlockInfo *pInfo;
+} STableCompactH;
+
+typedef struct {
+  SRtn       rtn;
+  SFSIter    fsIter;
+  SArray *   tbArray;  // table array to cache table obj and block indexes
+  SReadH     readh;
+  SDFileSet  wSet;
+  SArray *   aBlkIdx;
+  SArray *   aSupBlk;
+  SDataCols *pDataCols;
+} SCompactH;
+
+#define TSDB_COMPACT_WSET(pComph) (&((pComph)->wSet))
+#define TSDB_COMPACT_REPO(pComph) TSDB_READ_REPO(&((pComph)->readh))
+#define TSDB_COMPACT_HEAD_FILE(pComph) TSDB_DFILE_IN_SET(TSDB_COMPACT_WSET(pComph), TSDB_FILE_HEAD)
+#define TSDB_COMPACT_DATA_FILE(pComph) TSDB_DFILE_IN_SET(TSDB_COMPACT_WSET(pComph), TSDB_FILE_DATA)
+#define TSDB_COMPACT_LAST_FILE(pComph) TSDB_DFILE_IN_SET(TSDB_COMPACT_WSET(pComph), TSDB_FILE_LAST)
+#define TSDB_COMPACT_BUF(pComph) TSDB_READ_BUF(&((pComph)->readh))
+#define TSDB_COMPACT_COMP_BUF(pComph) TSDB_READ_COMP_BUF(&((pComph)->readh))
+
+static int  tsdbAsyncCompact(STsdbRepo *pRepo);
+static void tsdbStartCompact(STsdbRepo *pRepo);
+static void tsdbEndCompact(STsdbRepo *pRepo, int eno);
+static int  tsdbCompactMeta(STsdbRepo *pRepo);
+static int  tsdbCompactTSData(STsdbRepo *pRepo);
+static int  tsdbCompactFSet(SCompactH *pComph, SDFileSet *pSet);
+static bool tsdbShouldCompact(SCompactH *pComph);
+static int  tsdbInitCompactH(SCompactH *pComph, STsdbRepo *pRepo);
+static void tsdbDestroyCompactH(SCompactH *pComph);
+static int  tsdbInitCompTbArray(SCompactH *pComph);
+static void tsdbDestroyCompTbArray(SCompactH *pComph);
+static int  tsdbCacheFSetIndex(SCompactH *pComph);
+static int  tsdbCompactFSetInit(SCompactH *pComph, SDFileSet *pSet);
+static void tsdbCompactFSetEnd(SCompactH *pComph);
+static int  tsdbCompactFSetImpl(SCompactH *pComph);
+static int  tsdbWriteBlockToRightFile(SCompactH *pComph, STable *pTable, SDataCols *pDataCols, void **ppBuf,
+                                      void **ppCBuf);
+
+int tsdbCompact(STsdbRepo *pRepo) { return tsdbAsyncCompact(pRepo); }
+
+void *tsdbCompactImpl(STsdbRepo *pRepo) {
+  // Check if there are files in TSDB FS to compact
+  if (REPO_FS(pRepo)->cstatus->pmf == NULL) {
+    tsdbInfo("vgId:%d no file to compact in FS", REPO_ID(pRepo));
+    return NULL;
+  }
+
+  tsdbStartCompact(pRepo);
+
+  if (tsdbCompactMeta(pRepo) < 0) {
+    tsdbError("vgId:%d failed to compact META data since %s", REPO_ID(pRepo), tstrerror(terrno));
+    goto _err;
+  }
+
+  if (tsdbCompactTSData(pRepo) < 0) {
+    tsdbError("vgId:%d failed to compact TS data since %s", REPO_ID(pRepo), tstrerror(terrno));
+    goto _err;
+  }
+
+  tsdbEndCompact(pRepo, TSDB_CODE_SUCCESS);
+  return NULL;
+
+_err:
+  pRepo->code = terrno;
+  tsdbEndCompact(pRepo, terrno);
+  return NULL;
+}
+
+static int tsdbAsyncCompact(STsdbRepo *pRepo) {
+  tsem_wait(&(pRepo->readyToCommit));
+  return tsdbScheduleCommit(pRepo, COMPACT_REQ);
+}
+
+static void tsdbStartCompact(STsdbRepo *pRepo) {
+  ASSERT(!pRepo->inCompact);
+  tsdbInfo("vgId:%d start to compact!", REPO_ID(pRepo));
+  tsdbStartFSTxn(pRepo, 0, 0);
+  pRepo->code = TSDB_CODE_SUCCESS;
+  pRepo->inCompact = true;
+}
+
+static void tsdbEndCompact(STsdbRepo *pRepo, int eno) {
+  if (eno != TSDB_CODE_SUCCESS) {
+    tsdbEndFSTxnWithError(REPO_FS(pRepo));
+  } else {
+    tsdbEndFSTxn(pRepo);
+  }
+  pRepo->inCompact = false;
+  tsdbInfo("vgId:%d compact over, %s", REPO_ID(pRepo), (eno == TSDB_CODE_SUCCESS) ? "succeed" : "failed");
+  tsem_post(&(pRepo->readyToCommit));
+}
+
+static int tsdbCompactMeta(STsdbRepo *pRepo) {
+  STsdbFS *pfs = REPO_FS(pRepo);
+  tsdbUpdateMFile(pfs, pfs->cstatus->pmf);
+  return 0;
+}
+
+static int tsdbCompactTSData(STsdbRepo *pRepo) {
+  SCompactH  compactH;
+  SDFileSet *pSet = NULL;
+
+  tsdbDebug("vgId:%d start to compact TS data", REPO_ID(pRepo));
+
+  // If no file, just return 0;
+  if (taosArrayGetSize(REPO_FS(pRepo)->cstatus->df) <= 0) {
+    tsdbDebug("vgId:%d no TS data file to compact, compact over", REPO_ID(pRepo));
+    return 0;
+  }
+
+  if (tsdbInitCompactH(&compactH, pRepo) < 0) {
+    return -1;
+  }
+
+  while ((pSet = tsdbFSIterNext(&(compactH.fsIter)))) {
+    // Remove those expired files
+    if (pSet->fid < compactH.rtn.minFid) {
+      tsdbInfo("vgId:%d FSET %d on level %d disk id %d expires, remove it", REPO_ID(pRepo), pSet->fid,
+               TSDB_FSET_LEVEL(pSet), TSDB_FSET_ID(pSet));
+      continue;
+    }
+
+    if (TSDB_FSET_LEVEL(pSet) == TFS_MAX_LEVEL) {
+      tsdbDebug("vgId:%d FSET %d on level %d, should not compact", REPO_ID(pRepo), pSet->fid, TFS_MAX_LEVEL);
+      tsdbUpdateDFileSet(REPO_FS(pRepo), pSet);
+      continue;
+    }
+
+    if (tsdbCompactFSet(&compactH, pSet) < 0) {
+      tsdbDestroyCompactH(&compactH);
+      tsdbError("vgId:%d failed to compact FSET %d since %s", REPO_ID(pRepo), pSet->fid, tstrerror(terrno));
+      return -1;
+    }
+  }
+
+  tsdbDestroyCompactH(&compactH);
+  tsdbDebug("vgId:%d compact TS data over", REPO_ID(pRepo));
+  return 0;
+}
+
+static int tsdbCompactFSet(SCompactH *pComph, SDFileSet *pSet) {
+  STsdbRepo *pRepo = TSDB_COMPACT_REPO(pComph);
+  SDiskID    did;
+
+  tsdbDebug("vgId:%d start to compact FSET %d on level %d id %d", REPO_ID(pRepo), pSet->fid, TSDB_FSET_LEVEL(pSet),
+            TSDB_FSET_ID(pSet));
+
+  if (tsdbCompactFSetInit(pComph, pSet) < 0) {
+    return -1;
+  }
+
+  if (!tsdbShouldCompact(pComph)) {
+    tsdbDebug("vgId:%d no need to compact FSET %d", REPO_ID(pRepo), pSet->fid);
+    if (tsdbApplyRtnOnFSet(TSDB_COMPACT_REPO(pComph), pSet, &(pComph->rtn)) < 0) {
+      tsdbCompactFSetEnd(pComph);
+      return -1;
+    }
+  } else {
+    // Create new fset as compacted fset
+    tfsAllocDisk(tsdbGetFidLevel(pSet->fid, &(pComph->rtn)), &(did.level), &(did.id));
+    if (did.level == TFS_UNDECIDED_LEVEL) {
+      terrno = TSDB_CODE_TDB_NO_AVAIL_DISK;
+      tsdbError("vgId:%d failed to compact FSET %d since %s", REPO_ID(pRepo), pSet->fid, tstrerror(terrno));
+      tsdbCompactFSetEnd(pComph);
+      return -1;
+    }
+
+    tsdbInitDFileSet(TSDB_COMPACT_WSET(pComph), did, REPO_ID(pRepo), TSDB_FSET_FID(pSet),
+                     FS_TXN_VERSION(REPO_FS(pRepo)));
+    if (tsdbCreateDFileSet(TSDB_COMPACT_WSET(pComph), true) < 0) {
+      tsdbError("vgId:%d failed to compact FSET %d since %s", REPO_ID(pRepo), pSet->fid, tstrerror(terrno));
+      tsdbCompactFSetEnd(pComph);
+      return -1;
+    }
+
+    if (tsdbCompactFSetImpl(pComph) < 0) {
+      tsdbCloseDFileSet(TSDB_COMPACT_WSET(pComph));
+      tsdbRemoveDFileSet(TSDB_COMPACT_WSET(pComph));
+      tsdbCompactFSetEnd(pComph);
+      return -1;
+    }
+
+    tsdbCloseDFileSet(TSDB_COMPACT_WSET(pComph));
+    tsdbUpdateDFileSet(REPO_FS(pRepo), TSDB_COMPACT_WSET(pComph));
+    tsdbDebug("vgId:%d FSET %d compact over", REPO_ID(pRepo), pSet->fid);
+  }
+
+  tsdbCompactFSetEnd(pComph);
+  return 0;
+}
+
+static bool tsdbShouldCompact(SCompactH *pComph) {
+  STsdbRepo *     pRepo = TSDB_COMPACT_REPO(pComph);
+  STsdbCfg *      pCfg = REPO_CFG(pRepo);
+  SReadH *        pReadh = &(pComph->readh);
+  STableCompactH *pTh;
+  SBlock *        pBlock;
+  int             defaultRows = TSDB_DEFAULT_BLOCK_ROWS(pCfg->maxRowsPerFileBlock);
+  SDFile *        pDataF = TSDB_READ_DATA_FILE(pReadh);
+  SDFile *        pLastF = TSDB_READ_LAST_FILE(pReadh);
+
+  int     tblocks = 0;       // total blocks
+  int     nSubBlocks = 0;    // # of blocks with sub-blocks
+  int     nSmallBlocks = 0;  // # of blocks with rows < defaultRows
+  int64_t tsize = 0;
+
+  for (size_t i = 0; i < taosArrayGetSize(pComph->tbArray); i++) {
+    pTh = (STableCompactH *)taosArrayGet(pComph->tbArray, i);
+
+    if (pTh->pTable == NULL || pTh->pBlkIdx == NULL) continue;
+
+    for (size_t bidx = 0; bidx < pTh->pBlkIdx->numOfBlocks; bidx++) {
+      tblocks++;
+      pBlock = pTh->pInfo->blocks + bidx;
+
+      if (pBlock->numOfRows < defaultRows) {
+        nSmallBlocks++;
+      }
+
+      if (pBlock->numOfSubBlocks > 1) {
+        nSubBlocks++;
+        for (int k = 0; k < pBlock->numOfSubBlocks; k++) {
+          SBlock *iBlock = ((SBlock *)POINTER_SHIFT(pTh->pInfo, pBlock->offset)) + k;
+          tsize = tsize + iBlock->len;
+        }
+      } else if (pBlock->numOfSubBlocks == 1) {
+        tsize += pBlock->len;
+      } else {
+        ASSERT(0);
+      }
+    }
+  }
+
+  return (((nSubBlocks * 1.0 / tblocks) > 0.33) || ((nSmallBlocks * 1.0 / tblocks) > 0.33) ||
+          (tsize * 1.0 / (pDataF->info.size + pLastF->info.size - 2 * TSDB_FILE_HEAD_SIZE) < 0.85));
+}
+
+static int tsdbInitCompactH(SCompactH *pComph, STsdbRepo *pRepo) {
+  STsdbCfg *pCfg = REPO_CFG(pRepo);
+
+  memset(pComph, 0, sizeof(*pComph));
+
+  TSDB_FSET_SET_CLOSED(TSDB_COMPACT_WSET(pComph));
+
+  tsdbGetRtnSnap(pRepo, &(pComph->rtn));
+  tsdbFSIterInit(&(pComph->fsIter), REPO_FS(pRepo), TSDB_FS_ITER_FORWARD);
+
+  if (tsdbInitReadH(&(pComph->readh), pRepo) < 0) {
+    return -1;
+  }
+
+  if (tsdbInitCompTbArray(pComph) < 0) {
+    tsdbDestroyCompactH(pComph);
+    return -1;
+  }
+
+  pComph->aBlkIdx = taosArrayInit(1024, sizeof(SBlockIdx));
+  if (pComph->aBlkIdx == NULL) {
+    terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
+    tsdbDestroyCompactH(pComph);
+    return -1;
+  }
+
+  pComph->aSupBlk = taosArrayInit(1024, sizeof(SBlock));
+  if (pComph->aSupBlk == NULL) {
+    terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
+    tsdbDestroyCompactH(pComph);
+    return -1;
+  }
+
+  pComph->pDataCols = tdNewDataCols(0, 0, pCfg->maxRowsPerFileBlock);
+  if (pComph->pDataCols == NULL) {
+    terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
+    tsdbDestroyCompactH(pComph);
+    return -1;
+  }
+
+  return 0;
+}
+
+static void tsdbDestroyCompactH(SCompactH *pComph) {
+  pComph->pDataCols = tdFreeDataCols(pComph->pDataCols);
+  pComph->aSupBlk = taosArrayDestroy(pComph->aSupBlk);
+  pComph->aBlkIdx = taosArrayDestroy(pComph->aBlkIdx);
+  tsdbDestroyCompTbArray(pComph);
+  tsdbDestroyReadH(&(pComph->readh));
+  tsdbCloseDFileSet(TSDB_COMPACT_WSET(pComph));
+}
+
+static int tsdbInitCompTbArray(SCompactH *pComph) {  // Init pComp->tbArray
+  STsdbRepo *pRepo = TSDB_COMPACT_REPO(pComph);
+  STsdbMeta *pMeta = pRepo->tsdbMeta;
+
+  if (tsdbRLockRepoMeta(pRepo) < 0) return -1;
+
+  pComph->tbArray = taosArrayInit(pMeta->maxTables, sizeof(STableCompactH));
+  if (pComph->tbArray == NULL) {
+    terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
+    tsdbUnlockRepoMeta(pRepo);
+    return -1;
+  }
+
+  // Note here must start from 0
+  for (int i = 0; i < pMeta->maxTables; i++) {
+    STableCompactH ch = {0};
+    if (pMeta->tables[i] != NULL) {
+      tsdbRefTable(pMeta->tables[i]);
+      ch.pTable = pMeta->tables[i];
+    }
+
+    if (taosArrayPush(pComph->tbArray, &ch) == NULL) {
+      terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
+      tsdbUnlockRepoMeta(pRepo);
+      return -1;
+    }
+  }
+
+  if (tsdbUnlockRepoMeta(pRepo) < 0) return -1;
+  return 0;
+}
+
+static void tsdbDestroyCompTbArray(SCompactH *pComph) {
+  STableCompactH *pTh;
+
+  if (pComph->tbArray == NULL) return;
+
+  for (size_t i = 0; i < taosArrayGetSize(pComph->tbArray); i++) {
+    pTh = (STableCompactH *)taosArrayGet(pComph->tbArray, i);
+    if (pTh->pTable) {
+      tsdbUnRefTable(pTh->pTable);
+    }
+
+    pTh->pInfo = taosTZfree(pTh->pInfo);
+  }
+
+  pComph->tbArray = taosArrayDestroy(pComph->tbArray);
+}
+
+static int tsdbCacheFSetIndex(SCompactH *pComph) {
+  SReadH *pReadH = &(pComph->readh);
+
+  if (tsdbLoadBlockIdx(pReadH) < 0) {
+    return -1;
+  }
+
+  for (int tid = 1; tid < taosArrayGetSize(pComph->tbArray); tid++) {
+    STableCompactH *pTh = (STableCompactH *)taosArrayGet(pComph->tbArray, tid);
+    pTh->pBlkIdx = NULL;
+
+    if (pTh->pTable == NULL) continue;
+    if (tsdbSetReadTable(pReadH, pTh->pTable) < 0) {
+      return -1;
+    }
+
+    if (pReadH->pBlkIdx == NULL) continue;
+    pTh->bindex = *(pReadH->pBlkIdx);
+    pTh->pBlkIdx = &(pTh->bindex);
+
+    if (tsdbMakeRoom((void **)(&(pTh->pInfo)), pTh->pBlkIdx->len) < 0) {
+      return -1;
+    }
+
+    if (tsdbLoadBlockInfo(pReadH, (void *)(pTh->pInfo)) < 0) {
+      return -1;
+    }
+  }
+
+  return 0;
+}
+
+static int tsdbCompactFSetInit(SCompactH *pComph, SDFileSet *pSet) {
+  taosArrayClear(pComph->aBlkIdx);
+  taosArrayClear(pComph->aSupBlk);
+
+  if (tsdbSetAndOpenReadFSet(&(pComph->readh), pSet) < 0) {
+    return -1;
+  }
+
+  if (tsdbCacheFSetIndex(pComph) < 0) {
+    tsdbCloseAndUnsetFSet(&(pComph->readh));
+    return -1;
+  }
+
+  return 0;
+}
+
+static void tsdbCompactFSetEnd(SCompactH *pComph) { tsdbCloseAndUnsetFSet(&(pComph->readh)); }
+
+static int tsdbCompactFSetImpl(SCompactH *pComph) {
+  STsdbRepo *pRepo = TSDB_COMPACT_REPO(pComph);
+  STsdbCfg * pCfg = REPO_CFG(pRepo);
+  SReadH *   pReadh = &(pComph->readh);
+  SBlockIdx  blkIdx;
+  void **    ppBuf = &(TSDB_COMPACT_BUF(pComph));
+  void **    ppCBuf = &(TSDB_COMPACT_COMP_BUF(pComph));
+  int        defaultRows = TSDB_DEFAULT_BLOCK_ROWS(pCfg->maxRowsPerFileBlock);
+
+  taosArrayClear(pComph->aBlkIdx);
+
+  for (int tid = 1; tid < taosArrayGetSize(pComph->tbArray); tid++) {
+    STableCompactH *pTh = (STableCompactH *)taosArrayGet(pComph->tbArray, tid);
+    STSchema *      pSchema;
+
+    if (pTh->pTable == NULL || pTh->pBlkIdx == NULL) continue;
+
+    pSchema = tsdbGetTableSchemaImpl(pTh->pTable, true, true, -1);
+    taosArrayClear(pComph->aSupBlk);
+    if ((tdInitDataCols(pComph->pDataCols, pSchema) < 0) || (tdInitDataCols(pReadh->pDCols[0], pSchema) < 0) ||
+        (tdInitDataCols(pReadh->pDCols[1], pSchema) < 0)) {
+      terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
+      return -1;
+    }
+    tdFreeSchema(pSchema);
+
+    // Loop to compact each block data
+    for (int i = 0; i < pTh->pBlkIdx->numOfBlocks; i++) {
+      SBlock *pBlock = pTh->pInfo->blocks + i;
+
+      // Load the block data
+      if (tsdbLoadBlockData(pReadh, pBlock, pTh->pInfo) < 0) {
+        return -1;
+      }
+
+      // Merge pComph->pDataCols and pReadh->pDCols[0] and write data to file
+      if (pComph->pDataCols->numOfRows == 0 && pBlock->numOfRows >= defaultRows) {
+        if (tsdbWriteBlockToRightFile(pComph, pTh->pTable, pReadh->pDCols[0], ppBuf, ppCBuf) < 0) {
+          return -1;
+        }
+      } else {
+        int ridx = 0;
+
+        while (true) {
+          if (pReadh->pDCols[0]->numOfRows - ridx == 0) break;
+          int rowsToMerge = MIN(pReadh->pDCols[0]->numOfRows - ridx, defaultRows - pComph->pDataCols->numOfRows);
+
+          tdMergeDataCols(pComph->pDataCols, pReadh->pDCols[0], rowsToMerge, &ridx);
+
+          if (pComph->pDataCols->numOfRows < defaultRows) {
+            break;
+          }
+
+          if (tsdbWriteBlockToRightFile(pComph, pTh->pTable, pComph->pDataCols, ppBuf, ppCBuf) < 0) {
+            return -1;
+          }
+          tdResetDataCols(pComph->pDataCols);
+        }
+      }
+    }
+
+    if (pComph->pDataCols->numOfRows > 0 &&
+        tsdbWriteBlockToRightFile(pComph, pTh->pTable, pComph->pDataCols, ppBuf, ppCBuf) < 0) {
+      return -1;
+    }
+
+    if (tsdbWriteBlockInfoImpl(TSDB_COMPACT_HEAD_FILE(pComph), pTh->pTable, pComph->aSupBlk, NULL, ppBuf, &blkIdx) <
+        0) {
+      return -1;
+    }
+
+    if ((blkIdx.numOfBlocks > 0) && (taosArrayPush(pComph->aBlkIdx, (void *)(&blkIdx)) == NULL)) {
+      terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
+      return -1;
+    }
+  }
+
+  if (tsdbWriteBlockIdx(TSDB_COMPACT_HEAD_FILE(pComph), pComph->aBlkIdx, ppBuf) < 0) {
+    return -1;
+  }
+
+  return 0;
+}
+
+static int tsdbWriteBlockToRightFile(SCompactH *pComph, STable *pTable, SDataCols *pDataCols, void **ppBuf,
+                                     void **ppCBuf) {
+  STsdbRepo *pRepo = TSDB_COMPACT_REPO(pComph);
+  STsdbCfg * pCfg = REPO_CFG(pRepo);
+  SDFile *   pDFile;
+  bool       isLast;
+  SBlock     block;
+
+  ASSERT(pDataCols->numOfRows > 0);
+
+  if (pDataCols->numOfRows < pCfg->minRowsPerFileBlock) {
+    pDFile = TSDB_COMPACT_LAST_FILE(pComph);
+    isLast = true;
+  } else {
+    pDFile = TSDB_COMPACT_DATA_FILE(pComph);
+    isLast = false;
+  }
+
+  if (tsdbWriteBlockImpl(pRepo, pTable, pDFile, pDataCols, &block, isLast, true, ppBuf, ppCBuf) < 0) {
+    return -1;
+  }
+
+  if (taosArrayPush(pComph->aSupBlk, (void *)(&block)) == NULL) {
+    terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
+    return -1;
+  }
+
+  return 0;
+}
 
 #endif
\ No newline at end of file

src/tsdb/src/tsdbMain.c

@@ -195,6 +195,8 @@ STsdbRepoInfo *tsdbGetStatus(STsdbRepo *pRepo) { return NULL; }
 
 int tsdbGetState(STsdbRepo *repo) { return repo->state; }
 
+bool tsdbInCompact(STsdbRepo *repo) { return repo->inCompact; }
+
 void tsdbReportStat(void *repo, int64_t *totalPoints, int64_t *totalStorage, int64_t *compStorage) {
   ASSERT(repo != NULL);
   STsdbRepo *pRepo = repo;
@@ -533,6 +535,7 @@ static STsdbRepo *tsdbNewRepo(STsdbCfg *pCfg, STsdbAppH *pAppH) {
 
   pRepo->state = TSDB_STATE_OK;
   pRepo->code = TSDB_CODE_SUCCESS;
+  pRepo->inCompact = false;
   pRepo->config = *pCfg;
   if (pAppH) {
     pRepo->appH = *pAppH;

src/tsdb/src/tsdbRead.c

@@ -218,11 +218,6 @@ static void tsdbMayUnTakeMemSnapshot(STsdbQueryHandle* pQueryHandle) {
 int64_t tsdbGetNumOfRowsInMemTable(TsdbQueryHandleT* pHandle) {
   STsdbQueryHandle* pQueryHandle = (STsdbQueryHandle*) pHandle;
 
-  size_t size = taosArrayGetSize(pQueryHandle->pTableCheckInfo);
-  assert(pQueryHandle->activeIndex < size && pQueryHandle->activeIndex >= 0 && size >= 1);
-  STableCheckInfo* pCheckInfo = taosArrayGet(pQueryHandle->pTableCheckInfo, pQueryHandle->activeIndex);
-  
-
   int64_t rows = 0;
   SMemRef* pMemRef = pQueryHandle->pMemRef;
   if (pMemRef == NULL) { return rows; }
@@ -233,15 +228,19 @@ int64_t tsdbGetNumOfRowsInMemTable(TsdbQueryHandleT* pHandle) {
   SMemTable* pMemT = pMemRef->snapshot.mem;
   SMemTable* pIMemT = pMemRef->snapshot.imem;
 
-  if (pMemT && pCheckInfo->tableId.tid < pMemT->maxTables) {
-    pMem = pMemT->tData[pCheckInfo->tableId.tid];
-    rows += (pMem && pMem->uid == pCheckInfo->tableId.uid) ? pMem->numOfRows: 0; 
-  }
-  if (pIMemT && pCheckInfo->tableId.tid < pIMemT->maxTables) {
-    pIMem = pIMemT->tData[pCheckInfo->tableId.tid];
-    rows += (pIMem && pIMem->uid == pCheckInfo->tableId.uid) ? pIMem->numOfRows: 0; 
+  size_t size = taosArrayGetSize(pQueryHandle->pTableCheckInfo);
+  for (int32_t i = 0; i < size; ++i) {
+    STableCheckInfo* pCheckInfo = taosArrayGet(pQueryHandle->pTableCheckInfo, i);
+
+    if (pMemT && pCheckInfo->tableId.tid < pMemT->maxTables) {
+      pMem = pMemT->tData[pCheckInfo->tableId.tid];
+      rows += (pMem && pMem->uid == pCheckInfo->tableId.uid) ? pMem->numOfRows : 0;
+    }
+    if (pIMemT && pCheckInfo->tableId.tid < pIMemT->maxTables) {
+      pIMem = pIMemT->tData[pCheckInfo->tableId.tid];
+      rows += (pIMem && pIMem->uid == pCheckInfo->tableId.uid) ? pIMem->numOfRows : 0;
+    }
   }
-  
   return rows;
 }
 
@@ -1088,7 +1087,11 @@ static int32_t handleDataMergeIfNeeded(STsdbQueryHandle* pQueryHandle, SBlock* p
   assert(cur->pos >= 0 && cur->pos <= binfo.rows);
 
   TSKEY key = (row != NULL)? dataRowKey(row):TSKEY_INITIAL_VAL;
-  tsdbDebug("%p key in mem:%"PRId64", 0x%"PRIx64, pQueryHandle, key, pQueryHandle->qId);
+  if (key != TSKEY_INITIAL_VAL) {
+    tsdbDebug("%p key in mem:%"PRId64", 0x%"PRIx64, pQueryHandle, key, pQueryHandle->qId);
+  } else {
+    tsdbDebug("%p no data in mem, 0x%"PRIx64, pQueryHandle, pQueryHandle->qId);
+  }
 
   if ((ASCENDING_TRAVERSE(pQueryHandle->order) && (key != TSKEY_INITIAL_VAL && key <= binfo.window.ekey)) ||
       (!ASCENDING_TRAVERSE(pQueryHandle->order) && (key != TSKEY_INITIAL_VAL && key >= binfo.window.skey))) {
@@ -1152,8 +1155,14 @@ static int32_t handleDataMergeIfNeeded(STsdbQueryHandle* pQueryHandle, SBlock* p
     }
 
     assert(cur->blockCompleted);
-    tsdbDebug("create data block from remain file block, brange:%"PRId64"-%"PRId64", rows:%d, lastKey:%"PRId64", %p",
-        cur->win.skey, cur->win.ekey, cur->rows, cur->lastKey, pQueryHandle);
+    if (cur->rows == binfo.rows) {
+      tsdbDebug("%p whole file block qualified, brange:%"PRId64"-%"PRId64", rows:%d, lastKey:%"PRId64", %"PRIx64,
+                pQueryHandle, cur->win.skey, cur->win.ekey, cur->rows, cur->lastKey, pQueryHandle->qId);
+    } else {
+      tsdbDebug("%p create data block from remain file block, brange:%"PRId64"-%"PRId64", rows:%d, total:%d, lastKey:%"PRId64", %"PRIx64,
+                pQueryHandle, cur->win.skey, cur->win.ekey, cur->rows, binfo.rows, cur->lastKey, pQueryHandle->qId);
+    }
+
   }
 
   return code;

src/util/inc/tutil.h

@@ -26,6 +26,7 @@ extern "C" {
 #include "taosdef.h"
 
 int32_t strdequote(char *src);
+int32_t strRmquote(char *z, int32_t len);
 size_t  strtrim(char *src);
 char *  strnchr(char *haystack, char needle, int32_t len, bool skipquote);
 char ** strsplit(char *src, const char *delim, int32_t *num);

src/util/src/ttokenizer.c

@@ -494,9 +494,9 @@ uint32_t tGetToken(char* z, uint32_t* tokenId) {
       }
 
       /* here is the 1u/1a/2s/3m/9y */
-      if ((z[i] == 'u' || z[i] == 'a' || z[i] == 's' || z[i] == 'm' || z[i] == 'h' || z[i] == 'd' || z[i] == 'n' ||
+      if ((z[i] == 'b' || z[i] == 'u' || z[i] == 'a' || z[i] == 's' || z[i] == 'm' || z[i] == 'h' || z[i] == 'd' || z[i] == 'n' ||
            z[i] == 'y' || z[i] == 'w' ||
-           z[i] == 'U' || z[i] == 'A' || z[i] == 'S' || z[i] == 'M' || z[i] == 'H' || z[i] == 'D' || z[i] == 'N' ||
+           z[i] == 'B' || z[i] == 'U' || z[i] == 'A' || z[i] == 'S' || z[i] == 'M' || z[i] == 'H' || z[i] == 'D' || z[i] == 'N' ||
            z[i] == 'Y' || z[i] == 'W') &&
           (isIdChar[(uint8_t)z[i + 1]] == 0)) {
         *tokenId = TK_VARIABLE;

src/util/src/tutil.c

@@ -52,6 +52,36 @@ int32_t strdequote(char *z) {
   return j + 1;  // only one quote, do nothing
 }
 
+
+int32_t strRmquote(char *z, int32_t len){  
+    // delete escape character: \\, \', \"
+    char delim = z[0];
+    if (delim != '\'' && delim != '\"') {
+      return len;
+    }
+  
+    int32_t cnt = 0;
+    int32_t j = 0;
+    for (uint32_t k = 1; k < len - 1; ++k) {
+      if (z[k] == '\\' || (z[k] == delim && z[k + 1] == delim)) {
+          z[j] = z[k + 1];
+  
+        cnt++;
+        j++;
+        k++;
+        continue;
+      }
+  
+      z[j] = z[k];
+      j++;
+    }
+  
+    z[j] = 0;
+    
+    return len - 2 - cnt;
+}
+
+
 size_t strtrim(char *z) {
   int32_t i = 0;
   int32_t j = 0;

tests/examples/c/apitest.c

@@ -86,7 +86,7 @@ static int print_result(TAOS_RES* res, int blockFetch) {
     }
   } else {
     while ((row = taos_fetch_row(res))) {
-      char temp[256];
+      char temp[256] = {0};
       taos_print_row(temp, row, fields, num_fields);
       puts(temp);
       nRows++;
@@ -391,10 +391,10 @@ void verify_prepare(TAOS* taos) {
   int         rows = 0;
   int         num_fields = taos_num_fields(result);
   TAOS_FIELD *fields = taos_fetch_fields(result);
-  char        temp[256];
 
   // fetch the records row by row
   while ((row = taos_fetch_row(result))) {
+    char temp[256] = {0};
     rows++;
     taos_print_row(temp, row, fields, num_fields);
     printf("%s\n", temp);
@@ -614,10 +614,10 @@ void verify_prepare2(TAOS* taos) {
   int         rows = 0;
   int         num_fields = taos_num_fields(result);
   TAOS_FIELD *fields = taos_fetch_fields(result);
-  char        temp[256];
 
   // fetch the records row by row
   while ((row = taos_fetch_row(result))) {
+    char temp[256] = {0};
     rows++;
     taos_print_row(temp, row, fields, num_fields);
     printf("%s\n", temp);
@@ -866,12 +866,10 @@ void verify_prepare3(TAOS* taos) {
   int         rows = 0;
   int         num_fields = taos_num_fields(result);
   TAOS_FIELD *fields = taos_fetch_fields(result);
-  char        temp[256] = {0};
 
   // fetch the records row by row
   while ((row = taos_fetch_row(result))) {
-    memset(temp, 0, sizeof(temp)/sizeof(temp[0]));
-
+    char temp[256] = {0};
     rows++;
     taos_print_row(temp, row, fields, num_fields);
     printf("%s\n", temp);

tests/examples/c/demo.c

@@ -116,12 +116,12 @@ void Test(TAOS *taos, char *qstr, int index)  {
   int         rows = 0;
   int         num_fields = taos_field_count(result);
   TAOS_FIELD *fields = taos_fetch_fields(result);
-  char        temp[1024];
 
   printf("num_fields = %d\n", num_fields);
   printf("select * from table, result:\n");
   // fetch the records row by row
   while ((row = taos_fetch_row(result))) {
+    char temp[1024] = {0};
     rows++;
     taos_print_row(temp, row, fields, num_fields);
     printf("%s\n", temp);

tests/examples/c/prepare.c

@@ -184,10 +184,10 @@ int main(int argc, char *argv[])
   int         rows = 0;
   int         num_fields = taos_num_fields(result);
   TAOS_FIELD *fields = taos_fetch_fields(result);
-  char        temp[256];
 
   // fetch the records row by row
   while ((row = taos_fetch_row(result))) {
+    char temp[256] = {0};
     rows++;
     taos_print_row(temp, row, fields, num_fields);
     printf("%s\n", temp);

tests/examples/c/subscribe.c

@@ -14,8 +14,6 @@ void print_result(TAOS_RES* res, int blockFetch) {
   int         num_fields = taos_num_fields(res);
   TAOS_FIELD* fields = taos_fetch_fields(res);
   int         nRows = 0;
-  char        buf[4096];
-
   
   if (blockFetch) {
     nRows = taos_fetch_block(res, &row);
@@ -25,6 +23,7 @@ void print_result(TAOS_RES* res, int blockFetch) {
     //}
   } else {
     while ((row = taos_fetch_row(res))) {
+      char buf[4096] = {0};
       taos_print_row(buf, row, fields, num_fields);
       puts(buf);
       nRows++;

tests/mas/Jenkinsfile

@@ -21,7 +21,7 @@ def pre_test(){
     cmake .. > /dev/null
     make > /dev/null
     make install > /dev/null
-    pip3 install ${WKC}/src/connector/python/linux/python3/
+    pip3 install ${WKC}/src/connector/python/ || echo 0
     '''
     return 1
 }

tests/pytest/cluster/clusterSetup.py

@@ -23,7 +23,8 @@ class Node:
         self.hostIP = hostIP
         self.hostName = hostName
         self.homeDir = homeDir
-        self.conn = Connection("{}@{}".format(username, hostName), connect_kwargs={"password": "{}".format(password)}) 
+        self.corePath = '/coredump'
+        self.conn = Connection("{}@{}".format(username, hostName), connect_kwargs={"password": "{}".format(password)})        
     
     def buildTaosd(self):
         try:
@@ -126,21 +127,37 @@ class Node:
         except Exception as e:
             print("remove taosd error for node %d " % self.index)
             logging.exception(e)
+    
+
+    def detectCoredumpFile(self):
+        try:
+            result = self.conn.run("find /coredump -name 'core_*' ", hide=True)
+            output = result.stdout
+            print("output: %s" % output)
+            return output
+        except Exception as e:
+            print("find coredump file error on node %d " % self.index)
+            logging.exception(e)
+        
 
 class Nodes:
     def __init__(self):
         self.tdnodes = []
-        self.tdnodes.append(Node(0, 'root', '52.143.103.7', 'node1', 'a', '/root/'))
-        self.tdnodes.append(Node(1, 'root', '52.250.48.222', 'node2', 'a', '/root/'))
-        self.tdnodes.append(Node(2, 'root', '51.141.167.23', 'node3', 'a', '/root/'))
-        self.tdnodes.append(Node(3, 'root', '52.247.207.173', 'node4', 'a', '/root/'))
-        self.tdnodes.append(Node(4, 'root', '51.141.166.100', 'node5', 'a', '/root/'))
+        self.tdnodes.append(Node(0, 'root', '192.168.17.194', 'taosdata', 'r', '/root/'))
+        # self.tdnodes.append(Node(1, 'root', '52.250.48.222', 'node2', 'a', '/root/'))
+        # self.tdnodes.append(Node(2, 'root', '51.141.167.23', 'node3', 'a', '/root/'))
+        # self.tdnodes.append(Node(3, 'root', '52.247.207.173', 'node4', 'a', '/root/'))
+        # self.tdnodes.append(Node(4, 'root', '51.141.166.100', 'node5', 'a', '/root/'))
 
     def stopOneNode(self, index):
+        self.tdnodes[index].stopTaosd()
         self.tdnodes[index].forceStopOneTaosd()
     
     def startOneNode(self, index):
         self.tdnodes[index].startOneTaosd()
+    
+    def detectCoredumpFile(self, index):
+        return self.tdnodes[index].detectCoredumpFile()
 
     def stopAllTaosd(self):
         for i in range(len(self.tdnodes)):
@@ -166,14 +183,32 @@ class Nodes:
         for i in range(len(self.tdnodes)):
             self.tdnodes[i].removeData()
 
-# kill taosd randomly every 10 mins
-nodes = Nodes()
-loop = 0
-while True:
-    loop = loop + 1    
-    index = random.randint(0, 4)
-    print("loop: %d, kill taosd on node%d" %(loop, index))
-    nodes.stopOneNode(index)
-    time.sleep(60)
-    nodes.startOneNode(index)
-    time.sleep(600)
+class Test:
+    def __init__(self):
+        self.nodes = Nodes()
+
+    # kill taosd randomly every 10 mins
+    def randomlyKillDnode(self):        
+        loop = 0
+        while True:                
+            index = random.randint(0, 4)
+            print("loop: %d, kill taosd on node%d" %(loop, index))
+            self.nodes.stopOneNode(index)
\ No newline at end of file
+            time.sleep(60)
+            self.nodes.startOneNode(index)
+            time.sleep(600)
+            loop = loop + 1
+    
+    def detectCoredump(self):
+        loop = 0
+        while True:
+            for i in range(len(self.nodes.tdnodes)):
+                result = self.nodes.detectCoredumpFile(i)
+                print("core file path is %s" % result)
+                if result and not result.isspace():
+                    self.nodes.stopAllTaosd()                    
+            print("sleep for 10 mins")
+            time.sleep(600)
+
+test = Test()
+test.detectCoredump()
\ No newline at end of file

tests/pytest/functions/showOfflineThresholdIs864000.py

@@ -25,7 +25,7 @@ class TDTestCase:
 
     def run(self):
         tdSql.query("show variables")
-        tdSql.checkData(51, 1, 864000)
+        tdSql.checkData(53, 1, 864000)
 
     def stop(self):
         tdSql.close()
@@ -33,4 +33,4 @@ class TDTestCase:
 
 
 tdCases.addWindows(__file__, TDTestCase())
-tdCases.addLinux(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
\ No newline at end of file

tests/script/fullGeneralSuite.sim

@@ -135,6 +135,7 @@ run general/parser/tags_dynamically_specifiy.sim
 run general/parser/set_tag_vals.sim
 #unsupport run general/parser/repeatAlter.sim
 #unsupport run general/parser/slimit_alter_tags.sim
+run general/parser/precision_ns.sim
 run general/stable/disk.sim
 run general/stable/dnode3.sim
 run general/stable/metrics.sim

tests/script/general/db/alter_option.sim

@@ -177,7 +177,7 @@ sql alter database db blocks 20
 sql alter database db blocks 10
 sql_error alter database db blocks 2
 sql_error alter database db blocks 1
-sql alter database db blocks 0
+sql_error alter database db blocks 0
 sql_error alter database db blocks -1
 sql_error alter database db blocks 10001
 

tests/script/general/db/topic1.sim

@@ -455,7 +455,7 @@ sql alter database db blocks 20
 sql alter database db blocks 10
 sql_error alter database db blocks 2
 sql_error alter database db blocks 1
-sql alter database db blocks 0
+sql_error alter database db blocks 0
 sql_error alter database db blocks -1
 sql_error alter database db blocks 10001
 

tests/script/general/parser/function.sim

@@ -932,3 +932,125 @@ if $data32 != 0.000144445 then
   return -1
 endi
 
+print ===========================> derivative
+sql drop table t1
+sql drop table tx;
+sql drop table m1;
+sql drop table if exists tm0;
+sql drop table if exists tm1;
+sql create table tm0(ts timestamp, k double)
+sql insert into tm0 values('2015-08-18T00:00:00Z', 2.064) ('2015-08-18T00:06:00Z', 2.116) ('2015-08-18T00:12:00Z', 2.028)
+sql insert into tm0 values('2015-08-18T00:18:00Z', 2.126) ('2015-08-18T00:24:00Z', 2.041) ('2015-08-18T00:30:00Z', 2.051)
+
+sql_error select derivative(ts) from tm0;
+sql_error select derivative(k) from tm0;
+sql_error select derivative(k, 0, 0) from tm0;
+sql_error select derivative(k, 1, 911) from tm0;
+sql_error select derivative(kx, 1s, 1) from tm0;
+sql_error select derivative(k, -20s, 1) from tm0;
+sql_error select derivative(k, 20a, 0) from tm0;
+sql_error select derivative(k, 200a, 0) from tm0;
+sql_error select derivative(k, 999a, 0) from tm0;
+sql_error select derivative(k, 20s, -12) from tm0;
+
+sql select derivative(k, 1s, 0) from tm0
+if $rows != 5 then
+  return -1
+endi
+
+if $data00 != @15-08-18 08:06:00.000@ then
+  return -1
+endi
+
+if $data01 != 0.000144444 then
+  print expect 0.000144444, actual: $data01
+  return -1
+endi
+
+if $data10 != @15-08-18 08:12:00.000@ then
+  return -1
+endi
+
+if $data11 != -0.000244444 then
+  return -1
+endi
+
+if $data20 != @15-08-18 08:18:00.000@ then
+  return -1
+endi
+
+if $data21 != 0.000272222 then
+  print expect 0.000272222, actual: $data21
+  return -1
+endi
+
+if $data30 != @15-08-18 08:24:00.000@ then
+  return -1
+endi
+
+if $data31 != -0.000236111 then
+  print expect 0.000236111, actual: $data31
+  return -1
+endi
+
+sql select derivative(k, 6m, 0) from tm0;
+if $rows != 5 then
+  return -1
+endi
+
+if $data00 != @15-08-18 08:06:00.000@ then
+  return -1
+endi
+
+if $data01 != 0.052000000 then
+  print expect 0.052000000, actual: $data01
+  return -1
+endi
+
+if $data10 != @15-08-18 08:12:00.000@ then
+  return -1
+endi
+
+if $data11 != -0.088000000 then
+  return -1
+endi
+
+if $data20 != @15-08-18 08:18:00.000@ then
+  return -1
+endi
+
+if $data21 != 0.098000000 then
+  return -1
+endi
+
+if $data30 != @15-08-18 08:24:00.000@ then
+  return -1
+endi
+
+if $data31 != -0.085000000 then
+  return -1
+endi
+
+sql select derivative(k, 12m, 0) from tm0;
+if $rows != 5 then
+  return -1
+endi
+
+if $data00 != @15-08-18 08:06:00.000@ then
+  return -1
+endi
+
+if $data01 != 0.104000000 then
+  print expect 0.104000000, actual: $data01
+  return -1
+endi
+
+sql select derivative(k, 6m, 1) from tm0;
+if $rows != 3 then
+  return -1
+endi
+
+sql_error select derivative(k, 6m, 1) from tm0 interval(1s);
+sql_error select derivative(k, 6m, 1) from tm0 session(ts, 1s);
+sql_error select derivative(k, 6m, 1) from tm0 group by k;
+sql_error select derivative(k, 6m, 1) from
\ No newline at end of file

tests/script/general/parser/nestquery.sim

@@ -147,8 +147,57 @@ if $data02 != @nest_tb0@ then
 endi
 
 print ===================> nest query interval
+sql_error select ts, avg(c1) from (select ts, c1 from nest_tb0);
 
+sql select avg(c1) from (select * from nest_tb0) interval(3d)
+if $rows != 3 then
+  return -1
+endi
+
+if $data00 != @20-09-14 00:00:00.000@  then
+  return -1
+endi
+
+if $data01 != 49.222222222 then
+  return -1
+endi
+
+if $data10 != @20-09-17 00:00:00.000@  then
+  print expect 20-09-17 00:00:00.000, actual: $data10
+  return -1
+endi
+
+if $data11 != 49.685185185 then
+  return -1
+endi
+
+if $data20 != @20-09-20 00:00:00.000@  then
+  return -1
+endi
+
+if $data21 != 49.500000000 then
+  return -1
+endi
+
+#define TSDB_FUNC_APERCT       7
+#define TSDB_FUNC_LAST_ROW     10
+#define TSDB_FUNC_TWA          14
+#define TSDB_FUNC_LEASTSQR     15
+#define TSDB_FUNC_ARITHM       23
+#define TSDB_FUNC_DIFF         24
+#define TSDB_FUNC_INTERP       28
+#define TSDB_FUNC_RATE         29
+#define TSDB_FUNC_IRATE        30
+#define TSDB_FUNC_DERIVATIVE   32
+
+sql_error select stddev(c1) from (select c1 from nest_tb0);
+sql_error select percentile(c1, 20) from (select * from nest_tb0);
+
+sql select avg(c1),sum(c2), max(c3), min(c4), count(*), first(c7), last(c7),spread(c6) from (select * from nest_tb0) interval(1d);
+
+sql select top(x, 20) from (select c1 x from nest_tb0);
 
+sql select bottom(x, 20) from (select c1 x from nest_tb0)
 
 print ===================> complex query
 

tests/script/general/parser/precision_ns.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 1000
+sql connect
+
+$dbPrefix = m_di_db_ns
+$tbPrefix = m_di_tb
+$mtPrefix = m_di_mt
+$ntPrefix = m_di_nt
+$tbNum = 2
+$rowNum = 200
+$futureTs = 300000000000 
+
+print =============== step1: create database and tables and insert data
+$i = 0
+$db = $dbPrefix . $i
+$mt = $mtPrefix . $i
+$nt = $ntPrefix . $i
+
+sql drop database $db -x step1
+step1:
+sql create database $db precision 'ns'
+sql use $db
+sql create table $mt (ts timestamp, tbcol int) TAGS(tgcol int)
+
+$i = 0
+while $i < $tbNum
+  $tb = $tbPrefix . $i
+  sql create table $tb using $mt tags( $i )
+
+  $x = 0
+  while $x < $rowNum
+    $cc = $futureTs + $x * 100 + 43
+    $ns = $cc . b
+    sql insert into $tb values (now + $ns , $x ) 
+    $x = $x + 1
+  endw 
+
+  $i = $i + 1
+endw 
+
+sql create table $nt (ts timestamp, tbcol int)
+$x = 0
+while $x < $rowNum
+    $cc = $futureTs + $x * 100 + 43
+    $ns = $cc . b
+    sql insert into $nt values (now + $ns , $x ) 
+    $x = $x + 1  
+endw
+
+sleep 100
+
+print =============== step2: select count(*) from tables
+$i = 0
+$tb = $tbPrefix . $i
+
+sql select count(*) from $tb
+
+if $data00 != $rowNum then
+  print expect $rowNum, actual:$data00
+  return -1
+endi
+
+$i = 0
+$mt = $mtPrefix . $i
+sql select count(*) from $mt
+
+$mtRowNum = $tbNum * $rowNum
+if $data00 != $mtRowNum then
+  print expect $mtRowNum, actual:$data00
+  return -1
+endi
+
+$i = 0
+$nt = $ntPrefix . $i
+
+sql select count(*) from $nt
+
+if $data00 != $rowNum then
+  print expect $rowNum, actual:$data00
+  return -1
+endi
+
+print =============== step3: check nano second timestamp
+$i = 0
+$mt = $mtPrefix . $i
+$tb = $tbPrefix . $i
+sql insert into $tb values (now-43b , $x ) 
+sql select count(*) from $tb where ts<now
+if $data00 != 1 then
+  print expected 1, actual: $data00
+endi
+
+
+print =============== step4: check interval/sliding nano second
+$i = 0
+$mt = $mtPrefix . $i
+sql_error select count(*) from $mt interval(1000b) sliding(100b)
+sql_error select count(*) from $mt interval(10000000b) sliding(99999b)
+
+sql select count(*) from $mt interval(100000000b) sliding(100000000b)
+
+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/testSuite.sim

@@ -62,4 +62,5 @@ run general/parser/binary_escapeCharacter.sim
 run general/parser/between_and.sim
 run general/parser/last_cache.sim
 run general/parser/nestquery.sim
+run general/parser/precision_ns.sim
 

tests/script/regressionSuite.sim

@@ -134,6 +134,7 @@ run general/parser/bug.sim
 run general/parser/tags_dynamically_specifiy.sim
 run general/parser/set_tag_vals.sim
 run general/parser/repeatAlter.sim
+run general/parser/precision_ns.sim
 ##unsupport run general/parser/slimit_alter_tags.sim
 run general/stable/disk.sim
 run general/stable/dnode3.sim

tests/tsim/src/simExe.c

@@ -813,8 +813,15 @@ bool simExecuteNativeSqlCommand(SScript *script, char *rest, bool isSlow) {
               value[length[i]] = 0;
               // snprintf(value, fields[i].bytes, "%s", (char *)row[i]);
               break;
-            case TSDB_DATA_TYPE_TIMESTAMP:
-              tt = *(int64_t *)row[i] / 1000;
+            case TSDB_DATA_TYPE_TIMESTAMP: {
+              int32_t precision = taos_result_precision(pSql);
+              if (precision == TSDB_TIME_PRECISION_MILLI) {
+                tt = (*(int64_t *)row[i]) / 1000;
+              } else if (precision == TSDB_TIME_PRECISION_MICRO) {
+                tt = (*(int64_t *)row[i]) / 1000000;
+              } else {
+                tt = (*(int64_t *)row[i]) / 1000000000;
+              }
               /* comment out as it make testcases like select_with_tags.sim fail.
                 but in windows, this may cause the call to localtime crash if tt < 0,
                 need to find a better solution.
@@ -829,9 +836,16 @@ bool simExecuteNativeSqlCommand(SScript *script, char *rest, bool isSlow) {
 
               tp = localtime(&tt);
               strftime(timeStr, 64, "%y-%m-%d %H:%M:%S", tp);
-              sprintf(value, "%s.%03d", timeStr, (int32_t)(*((int64_t *)row[i]) % 1000));
+              if (precision == TSDB_TIME_PRECISION_MILLI) {
+                sprintf(value, "%s.%03d", timeStr, (int32_t)(*((int64_t *)row[i]) % 1000));
+              } else if (precision == TSDB_TIME_PRECISION_MICRO) {
+                sprintf(value, "%s.%06d", timeStr, (int32_t)(*((int64_t *)row[i]) % 1000000));
+              } else {
+                sprintf(value, "%s.%09d", timeStr, (int32_t)(*((int64_t *)row[i]) % 1000000000));                
+              }
 
               break;
+            }
             default:
               break;
           }  // end of switch