diff --git a/src/query/inc/qExecutor.h b/src/query/inc/qExecutor.h
index f392644e67..b474bea987 100644
--- a/src/query/inc/qExecutor.h
+++ b/src/query/inc/qExecutor.h
@@ -33,15 +33,11 @@ struct SColumnFilterElem;
typedef bool (*__filter_func_t)(struct SColumnFilterElem* pFilter, char* val1, char* val2);
typedef int32_t (*__block_search_fn_t)(char* data, int32_t num, int64_t key, int32_t order);
-typedef struct SPosInfo {
- int32_t pageId:20;
- int32_t rowId:12;
-} SPosInfo;
-
typedef struct SGroupResInfo {
int32_t groupId;
int32_t numOfDataPages;
- SPosInfo pos;
+ int32_t pageId;
+ int32_t rowId;
} SGroupResInfo;
typedef struct SSqlGroupbyExpr {
@@ -53,9 +49,10 @@ typedef struct SSqlGroupbyExpr {
} SSqlGroupbyExpr;
typedef struct SWindowResult {
- SPosInfo pos; // Position of current result in disk-based output buffer
+ int32_t pageId; // pageId & rowId is the position of current result in disk-based output buffer
+ int32_t rowId:15;
+ bool closed:1; // this result status: closed or opened
uint16_t numOfRows; // number of rows of current time window
- bool closed; // this result status: closed or opened
SResultInfo* resultInfo; // For each result column, there is a resultInfo
union {STimeWindow win; char* key;}; // start key of current time window
} SWindowResult;
diff --git a/src/query/inc/qUtil.h b/src/query/inc/qUtil.h
index 5320e5622e..32f26f66f5 100644
--- a/src/query/inc/qUtil.h
+++ b/src/query/inc/qUtil.h
@@ -51,7 +51,7 @@ static FORCE_INLINE char *getPosInResultPage(SQueryRuntimeEnv *pRuntimeEnv, int3
SQuery *pQuery = pRuntimeEnv->pQuery;
- int32_t realRowId = (int32_t)(pResult->pos.rowId * GET_ROW_PARAM_FOR_MULTIOUTPUT(pQuery, pRuntimeEnv->topBotQuery, pRuntimeEnv->stableQuery));
+ int32_t realRowId = (int32_t)(pResult->rowId * GET_ROW_PARAM_FOR_MULTIOUTPUT(pQuery, pRuntimeEnv->topBotQuery, pRuntimeEnv->stableQuery));
return ((char *)page->data) + pRuntimeEnv->offset[columnIndex] * pRuntimeEnv->numOfRowsPerPage +
pQuery->pSelectExpr[columnIndex].bytes * realRowId;
}
diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index d46beab2cb..dd8f83a643 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -557,7 +557,7 @@ static STimeWindow getActiveTimeWindow(SWindowResInfo *pWindowResInfo, int64_t t
static int32_t addNewWindowResultBuf(SWindowResult *pWindowRes, SDiskbasedResultBuf *pResultBuf, int32_t sid,
int32_t numOfRowsPerPage) {
- if (pWindowRes->pos.pageId != -1) {
+ if (pWindowRes->pageId != -1) {
return 0;
}
@@ -590,11 +590,11 @@ static int32_t addNewWindowResultBuf(SWindowResult *pWindowRes, SDiskbasedResult
}
// set the number of rows in current disk page
- if (pWindowRes->pos.pageId == -1) { // not allocated yet, allocate new buffer
- pWindowRes->pos.pageId = pageId;
- pWindowRes->pos.rowId = (int32_t)(pData->num++);
+ if (pWindowRes->pageId == -1) { // not allocated yet, allocate new buffer
+ pWindowRes->pageId = pageId;
+ pWindowRes->rowId = (int32_t)(pData->num++);
- assert(pWindowRes->pos.pageId >= 0);
+ assert(pWindowRes->pageId >= 0);
}
return 0;
@@ -616,7 +616,7 @@ static int32_t setWindowOutputBufByKey(SQueryRuntimeEnv *pRuntimeEnv, SWindowRes
*newWind = true;
// not assign result buffer yet, add new result buffer
- if (pWindowRes->pos.pageId == -1) {
+ if (pWindowRes->pageId == -1) {
int32_t ret = addNewWindowResultBuf(pWindowRes, pResultBuf, sid, pRuntimeEnv->numOfRowsPerPage);
if (ret != TSDB_CODE_SUCCESS) {
return -1;
@@ -1143,7 +1143,7 @@ static int32_t setGroupResultOutputBuf(SQueryRuntimeEnv *pRuntimeEnv, char *pDat
assert(pRuntimeEnv->windowResInfo.interval == 0);
- if (pWindowRes->pos.pageId == -1) {
+ if (pWindowRes->pageId == -1) {
int32_t ret = addNewWindowResultBuf(pWindowRes, pResultBuf, GROUPRESULTID, pRuntimeEnv->numOfRowsPerPage);
if (ret != 0) {
return -1;
@@ -2652,7 +2652,7 @@ static void doMerge(SQueryRuntimeEnv *pRuntimeEnv, int64_t timestamp, SWindowRes
SQuery * pQuery = pRuntimeEnv->pQuery;
SQLFunctionCtx *pCtx = pRuntimeEnv->pCtx;
- tFilePage *page = getResBufPage(pRuntimeEnv->pResultBuf, pWindowRes->pos.pageId);
+ tFilePage *page = getResBufPage(pRuntimeEnv->pResultBuf, pWindowRes->pageId);
for (int32_t i = 0; i < pQuery->numOfOutput; ++i) {
int32_t functionId = pQuery->pSelectExpr[i].base.functionId;
@@ -2823,14 +2823,14 @@ int32_t tableResultComparFn(const void *pLeft, const void *pRight, void *param)
SWindowResInfo *pWindowResInfo1 = &supporter->pTableQueryInfo[left]->windowResInfo;
SWindowResult * pWindowRes1 = getWindowResult(pWindowResInfo1, leftPos);
- tFilePage *page1 = getResBufPage(pRuntimeEnv->pResultBuf, pWindowRes1->pos.pageId);
+ tFilePage *page1 = getResBufPage(pRuntimeEnv->pResultBuf, pWindowRes1->pageId);
char *b1 = getPosInResultPage(pRuntimeEnv, PRIMARYKEY_TIMESTAMP_COL_INDEX, pWindowRes1, page1);
TSKEY leftTimestamp = GET_INT64_VAL(b1);
SWindowResInfo *pWindowResInfo2 = &supporter->pTableQueryInfo[right]->windowResInfo;
SWindowResult * pWindowRes2 = getWindowResult(pWindowResInfo2, rightPos);
- tFilePage *page2 = getResBufPage(pRuntimeEnv->pResultBuf, pWindowRes2->pos.pageId);
+ tFilePage *page2 = getResBufPage(pRuntimeEnv->pResultBuf, pWindowRes2->pageId);
char *b2 = getPosInResultPage(pRuntimeEnv, PRIMARYKEY_TIMESTAMP_COL_INDEX, pWindowRes2, page2);
TSKEY rightTimestamp = GET_INT64_VAL(b2);
@@ -2867,7 +2867,7 @@ int32_t mergeIntoGroupResult(SQInfo *pQInfo) {
}
SGroupResInfo* info = &pQInfo->groupResInfo;
- if (pQInfo->groupIndex == numOfGroups && info->pos.pageId == info->numOfDataPages) {
+ if (pQInfo->groupIndex == numOfGroups && info->pageId == info->numOfDataPages) {
SET_STABLE_QUERY_OVER(pQInfo);
}
@@ -2883,10 +2883,10 @@ void copyResToQueryResultBuf(SQInfo *pQInfo, SQuery *pQuery) {
SGroupResInfo* pGroupResInfo = &pQInfo->groupResInfo;
// all results have been return to client, try next group
- if (pGroupResInfo->pos.pageId == pGroupResInfo->numOfDataPages) {
+ if (pGroupResInfo->pageId == pGroupResInfo->numOfDataPages) {
pGroupResInfo->numOfDataPages = 0;
- pGroupResInfo->pos.pageId = 0;
- pGroupResInfo->pos.rowId = 0;
+ pGroupResInfo->pageId = 0;
+ pGroupResInfo->rowId = 0;
// current results of group has been sent to client, try next group
if (mergeIntoGroupResult(pQInfo) != TSDB_CODE_SUCCESS) {
@@ -2914,22 +2914,22 @@ void copyResToQueryResultBuf(SQInfo *pQInfo, SQuery *pQuery) {
assert(size == pGroupResInfo->numOfDataPages);
bool done = false;
- for (int32_t j = pGroupResInfo->pos.pageId; j < size; ++j) {
+ for (int32_t j = pGroupResInfo->pageId; j < size; ++j) {
SPageInfo* pi = *(SPageInfo**) taosArrayGet(list, j);
tFilePage* pData = getResBufPage(pResultBuf, pi->pageId);
- assert(pData->num > 0 && pData->num <= pRuntimeEnv->numOfRowsPerPage && pGroupResInfo->pos.rowId < pData->num);
- int32_t numOfRes = (int32_t)(pData->num - pGroupResInfo->pos.rowId);
+ assert(pData->num > 0 && pData->num <= pRuntimeEnv->numOfRowsPerPage && pGroupResInfo->rowId < pData->num);
+ int32_t numOfRes = (int32_t)(pData->num - pGroupResInfo->rowId);
if (numOfRes > pQuery->rec.capacity - offset) {
numOfCopiedRows = (int32_t)(pQuery->rec.capacity - offset);
- pGroupResInfo->pos.rowId += numOfCopiedRows;
+ pGroupResInfo->rowId += numOfCopiedRows;
done = true;
} else {
numOfCopiedRows = (int32_t)pData->num;
- pGroupResInfo->pos.pageId += 1;
- pGroupResInfo->pos.rowId = 0;
+ pGroupResInfo->pageId += 1;
+ pGroupResInfo->rowId = 0;
}
for (int32_t i = 0; i < pQuery->numOfOutput; ++i) {
@@ -3020,8 +3020,8 @@ int32_t mergeIntoGroupResultImpl(SQInfo *pQInfo, SArray *pGroup) {
pGroupResInfo->numOfDataPages = (int32_t)taosArrayGetSize(pageList);
pGroupResInfo->groupId = tid;
- pGroupResInfo->pos.pageId = 0;
- pGroupResInfo->pos.rowId = 0;
+ pGroupResInfo->pageId = 0;
+ pGroupResInfo->rowId = 0;
return pGroupResInfo->numOfDataPages;
}
@@ -3067,7 +3067,7 @@ int32_t mergeIntoGroupResultImpl(SQInfo *pQInfo, SArray *pGroup) {
SWindowResInfo *pWindowResInfo = &pTableList[pos]->windowResInfo;
SWindowResult *pWindowRes = getWindowResult(pWindowResInfo, cs.position[pos]);
- tFilePage *page = getResBufPage(pRuntimeEnv->pResultBuf, pWindowRes->pos.pageId);
+ tFilePage *page = getResBufPage(pRuntimeEnv->pResultBuf, pWindowRes->pageId);
char *b = getPosInResultPage(pRuntimeEnv, PRIMARYKEY_TIMESTAMP_COL_INDEX, pWindowRes, page);
TSKEY ts = GET_INT64_VAL(b);
@@ -3104,7 +3104,7 @@ int32_t mergeIntoGroupResultImpl(SQInfo *pQInfo, SArray *pGroup) {
lastTimestamp = ts;
// move to the next element of current entry
- int32_t currentPageId = pWindowRes->pos.pageId;
+ int32_t currentPageId = pWindowRes->pageId;
cs.position[pos] += 1;
if (cs.position[pos] >= pWindowResInfo->size) {
@@ -3117,7 +3117,7 @@ int32_t mergeIntoGroupResultImpl(SQInfo *pQInfo, SArray *pGroup) {
} else {
// current page is not needed anymore
SWindowResult *pNextWindowRes = getWindowResult(pWindowResInfo, cs.position[pos]);
- if (pNextWindowRes->pos.pageId != currentPageId) {
+ if (pNextWindowRes->pageId != currentPageId) {
releaseResBufPage(pRuntimeEnv->pResultBuf, page);
}
}
@@ -3329,7 +3329,8 @@ int32_t createQueryResultInfo(SQuery *pQuery, SWindowResult *pResultRow, bool is
return TSDB_CODE_QRY_OUT_OF_MEMORY;
}
- pResultRow->pos = (SPosInfo) {-1, -1};
+ pResultRow->pageId = -1;
+ pResultRow->rowId = -1;
char* buf = (char*) pResultRow->resultInfo + numOfCols * sizeof(SResultInfo);
@@ -3796,7 +3797,7 @@ void setExecutionContext(SQInfo *pQInfo, int32_t groupIndex, TSKEY nextKey) {
* not assign result buffer yet, add new result buffer
* all group belong to one result set, and each group result has different group id so set the id to be one
*/
- if (pWindowRes->pos.pageId == -1) {
+ if (pWindowRes->pageId == -1) {
if (addNewWindowResultBuf(pWindowRes, pRuntimeEnv->pResultBuf, groupIndex, pRuntimeEnv->numOfRowsPerPage) !=
TSDB_CODE_SUCCESS) {
return;
@@ -3813,7 +3814,7 @@ void setWindowResOutputBuf(SQueryRuntimeEnv *pRuntimeEnv, SWindowResult *pResult
SQuery *pQuery = pRuntimeEnv->pQuery;
// Note: pResult->pos[i]->num == 0, there is only fixed number of results for each group
- tFilePage *page = getResBufPage(pRuntimeEnv->pResultBuf, pResult->pos.pageId);
+ tFilePage *page = getResBufPage(pRuntimeEnv->pResultBuf, pResult->pageId);
for (int32_t i = 0; i < pQuery->numOfOutput; ++i) {
SQLFunctionCtx *pCtx = &pRuntimeEnv->pCtx[i];
@@ -3840,7 +3841,7 @@ void setWindowResOutputBufInitCtx(SQueryRuntimeEnv *pRuntimeEnv, SWindowResult *
SQuery *pQuery = pRuntimeEnv->pQuery;
// Note: pResult->pos[i]->num == 0, there is only fixed number of results for each group
- tFilePage* bufPage = getResBufPage(pRuntimeEnv->pResultBuf, pResult->pos.pageId);
+ tFilePage* bufPage = getResBufPage(pRuntimeEnv->pResultBuf, pResult->pageId);
for (int32_t i = 0; i < pQuery->numOfOutput; ++i) {
SQLFunctionCtx *pCtx = &pRuntimeEnv->pCtx[i];
@@ -4019,12 +4020,12 @@ static int32_t doCopyToSData(SQInfo *pQInfo, SWindowResInfo *pResultInfo, int32_
for (int32_t i = startIdx; (i < totalSet) && (i >= 0); i += step) {
if (result[i].numOfRows == 0) {
pQInfo->groupIndex += 1;
- pGroupResInfo->pos.rowId = 0;
+ pGroupResInfo->rowId = 0;
continue;
}
- int32_t numOfRowsToCopy = result[i].numOfRows - pGroupResInfo->pos.rowId;
- int32_t oldOffset = pGroupResInfo->pos.rowId;
+ int32_t numOfRowsToCopy = result[i].numOfRows - pGroupResInfo->rowId;
+ int32_t oldOffset = pGroupResInfo->rowId;
/*
* current output space is not enough to accommodate all data of this page, only partial results
@@ -4032,13 +4033,13 @@ static int32_t doCopyToSData(SQInfo *pQInfo, SWindowResInfo *pResultInfo, int32_
*/
if (numOfRowsToCopy > pQuery->rec.capacity - numOfResult) {
numOfRowsToCopy = (int32_t) pQuery->rec.capacity - numOfResult;
- pGroupResInfo->pos.rowId += numOfRowsToCopy;
+ pGroupResInfo->rowId += numOfRowsToCopy;
} else {
- pGroupResInfo->pos.rowId = 0;
+ pGroupResInfo->rowId = 0;
pQInfo->groupIndex += 1;
}
- tFilePage *page = getResBufPage(pRuntimeEnv->pResultBuf, result[i].pos.pageId);
+ tFilePage *page = getResBufPage(pRuntimeEnv->pResultBuf, result[i].pageId);
for (int32_t j = 0; j < pQuery->numOfOutput; ++j) {
int32_t size = pRuntimeEnv->pCtx[j].outputBytes;
diff --git a/src/query/src/qUtil.c b/src/query/src/qUtil.c
index 2bd92c74a4..ac95afffb1 100644
--- a/src/query/src/qUtil.c
+++ b/src/query/src/qUtil.c
@@ -266,7 +266,7 @@ void clearTimeWindowResBuf(SQueryRuntimeEnv *pRuntimeEnv, SWindowResult *pWindow
return;
}
- tFilePage *page = getResBufPage(pRuntimeEnv->pResultBuf, pWindowRes->pos.pageId);
+ tFilePage *page = getResBufPage(pRuntimeEnv->pResultBuf, pWindowRes->pageId);
for (int32_t i = 0; i < pRuntimeEnv->pQuery->numOfOutput; ++i) {
SResultInfo *pResultInfo = &pWindowRes->resultInfo[i];
@@ -279,7 +279,8 @@ void clearTimeWindowResBuf(SQueryRuntimeEnv *pRuntimeEnv, SWindowResult *pWindow
}
pWindowRes->numOfRows = 0;
- pWindowRes->pos = (SPosInfo){-1, -1};
+ pWindowRes->pageId = -1;
+ pWindowRes->rowId = -1;
pWindowRes->closed = false;
pWindowRes->win = TSWINDOW_INITIALIZER;
}
@@ -308,10 +309,10 @@ void copyTimeWindowResBuf(SQueryRuntimeEnv *pRuntimeEnv, SWindowResult *dst, con
memcpy(pDst->interResultBuf, pSrc->interResultBuf, pDst->bufLen);
// copy the output buffer data from src to dst, the position info keep unchanged
- tFilePage *dstpage = getResBufPage(pRuntimeEnv->pResultBuf, dst->pos.pageId);
+ tFilePage *dstpage = getResBufPage(pRuntimeEnv->pResultBuf, dst->pageId);
char * dstBuf = getPosInResultPage(pRuntimeEnv, i, dst, dstpage);
- tFilePage *srcpage = getResBufPage(pRuntimeEnv->pResultBuf, src->pos.pageId);
+ tFilePage *srcpage = getResBufPage(pRuntimeEnv->pResultBuf, src->pageId);
char * srcBuf = getPosInResultPage(pRuntimeEnv, i, (SWindowResult *)src, srcpage);
size_t s = pRuntimeEnv->pQuery->pSelectExpr[i].bytes;
diff --git a/src/rpc/src/rpcMain.c b/src/rpc/src/rpcMain.c
index 294e204791..4c9493bc10 100644
--- a/src/rpc/src/rpcMain.c
+++ b/src/rpc/src/rpcMain.c
@@ -215,6 +215,11 @@ static void rpcUnlockConn(SRpcConn *pConn);
static void rpcAddRef(SRpcInfo *pRpc);
static void rpcDecRef(SRpcInfo *pRpc);
+static void rpcFree(void *p) {
+ tTrace("free mem: %p", p);
+ free(p);
+}
+
static void rpcInit(void) {
tsProgressTimer = tsRpcTimer/2;
@@ -222,7 +227,7 @@ static void rpcInit(void) {
tsRpcHeadSize = RPC_MSG_OVERHEAD;
tsRpcOverhead = sizeof(SRpcReqContext);
- tsRpcRefId = taosOpenRef(200, free);
+ tsRpcRefId = taosOpenRef(200, rpcFree);
}
void *rpcOpen(const SRpcInit *pInit) {
diff --git a/src/tsdb/src/tsdbRead.c b/src/tsdb/src/tsdbRead.c
index 83904e8bf0..33bbbee300 100644
--- a/src/tsdb/src/tsdbRead.c
+++ b/src/tsdb/src/tsdbRead.c
@@ -1271,7 +1271,6 @@ static void copyAllRemainRowsFromFileBlock(STsdbQueryHandle* pQueryHandle, STabl
int32_t end = endPos;
if (!ASCENDING_TRAVERSE(pQueryHandle->order)) {
- assert(start >= end);
SWAP(start, end, int32_t);
}
diff --git a/src/util/src/tref.c b/src/util/src/tref.c
index 5e0a85fdb6..4c3b836340 100644
--- a/src/util/src/tref.c
+++ b/src/util/src/tref.c
@@ -159,8 +159,8 @@ int taosAddRef(int refId, void *p)
taosLockList(pSet->lockedBy+hash);
pNode = pSet->nodeList[hash];
- while ( pNode ) {
- if ( pNode->p == p )
+ while (pNode) {
+ if (pNode->p == p)
break;
pNode = pNode->next;
@@ -176,8 +176,9 @@ int taosAddRef(int refId, void *p)
pNode->count = 1;
pNode->prev = 0;
pNode->next = pSet->nodeList[hash];
+ if (pSet->nodeList[hash]) pSet->nodeList[hash]->prev = pNode;
pSet->nodeList[hash] = pNode;
- uTrace("refId:%d p:%p is added, count::%d", refId, p, pSet->count);
+ uTrace("refId:%d p:%p is added, count:%d malloc mem: %p", refId, p, pSet->count, pNode);
} else {
code = TSDB_CODE_REF_NO_MEMORY;
uTrace("refId:%d p:%p is not added, since no memory", refId, p);
@@ -197,7 +198,7 @@ int taosAcquireRef(int refId, void *p)
SRefNode *pNode;
SRefSet *pSet;
- if ( refId < 0 || refId >= TSDB_REF_OBJECTS ) {
+ if (refId < 0 || refId >= TSDB_REF_OBJECTS) {
uTrace("refId:%d p:%p failed to acquire, refId not valid", refId, p);
return TSDB_CODE_REF_INVALID_ID;
}
@@ -267,7 +268,7 @@ void taosReleaseRef(int refId, void *p)
pNode = pSet->nodeList[hash];
while (pNode) {
- if ( pNode->p == p )
+ if (pNode->p == p)
break;
pNode = pNode->next;
@@ -291,7 +292,7 @@ void taosReleaseRef(int refId, void *p)
free(pNode);
released = 1;
- uTrace("refId:%d p:%p is removed, count::%d", refId, p, pSet->count);
+ uTrace("refId:%d p:%p is removed, count:%d, free mem: %p", refId, p, pSet->count, pNode);
} else {
uTrace("refId:%d p:%p is released", refId, p);
}
diff --git a/tests/examples/JDBC/JDBCDemo/README-jdbc-windows.md b/tests/examples/JDBC/JDBCDemo/README-jdbc-windows.md
new file mode 100644
index 0000000000..1c0e4c100b
--- /dev/null
+++ b/tests/examples/JDBC/JDBCDemo/README-jdbc-windows.md
@@ -0,0 +1,268 @@
+# 如何在 windows环境下使用jdbc进行TDengine应用开发
+
+本文以windows环境为例，介绍java如何进行TDengine开发应用
+
+## 环境准备
+
+（1）安装jdk
+
+官网下载jdk-1.8，下载页面：https://www.oracle.com/java/technologies/javase/javase-jdk8-downloads.html
+
+安装，配置环境变量，把jdk加入到环境变量里。
+
+命令行内查看java的版本。
+
+```shell
+>java -version
+java version "1.8.0_131"
+Java(TM) SE Runtime Environment (build 1.8.0_131-b11)
+Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)
+```
+
+
+（2）安装配置maven
+
+官网下载maven，下载地址：http://maven.apache.org/download.cgi
+
+配置环境变量MAVEN_HOME，将MAVEN_HOME/bin添加到PATH
+
+命令行里查看maven的版本
+
+```shell
+>mvn --version
+Apache Maven 3.5.0 (ff8f5e7444045639af65f6095c62210b5713f426; 2017-04-04T03:39:06+08:00)
+Maven home: D:\apache-maven-3.5.0\bin\..
+Java version: 1.8.0_131, vendor: Oracle Corporation
+Java home: C:\Program Files\Java\jdk1.8.0_131\jre
+Default locale: zh_CN, platform encoding: GBK
+OS name: "windows 10", version: "10.0", arch: "amd64", family: "windows"
+```
+
+为了加快maven下载依赖的速度，可以为maven配置mirror，修改MAVEN_HOME\config\settings.xml文件
+
+```xml
+
+
+ D:\apache-maven-localRepository
+
+
+
+
+ alimaven
+ aliyun maven
+ http://maven.aliyun.com/nexus/content/groups/public/
+ central
+
+
+
+
+
+
+ jdk-1.8
+
+ true
+ 1.8
+
+
+ 1.8
+ 1.8
+ 1.8
+
+
+
+
+```
+
+
+
+（3）在linux服务器上安装TDengine-server
+
+在taosdata官网下载TDengine-server，下载地址：https://www.taosdata.com/cn/all-downloads/
+
+在linux服务器上安装TDengine-server
+
+```shell
+# tar -zxvf package/TDengine-server-2.0.1.1-Linux-x64.tar.gz
+# cd TDengine-server/
+# ./install.sh
+```
+
+启动taosd
+
+```shell
+# systemctl start taosd
+```
+
+在server上用taos连接taosd
+
+```shell
+# taos
+taos> show dnodes;
+ id | end_point | vnodes | cores | status | role | create_time |
+==================================================================================================================
+ 1 | td01:6030 | 2 | 4 | ready | any | 2020-08-19 18:40:25.045 |
+Query OK, 1 row(s) in set (0.005765s)
+```
+
+如果可以正确连接到taosd实例，并打印出databases的信息，说明TDengine的server已经正确启动。这里查看server的hostname
+
+```shell
+# hostname -f
+td01
+```
+
+注意，如果安装TDengine后，使用默认的taos.cfg配置文件，taosd会使用当前server的hostname创建dnode实例。之后，在client也需要使用这个hostname来连接taosd。
+
+
+
+（4）在windows上安装TDengine-client
+
+在taosdata官网下载taos客户端，下载地址：
+https://www.taosdata.com/cn/all-downloads/
+下载后，双击exe安装。
+
+修改client的hosts文件（C:\Windows\System32\drivers\etc\hosts），将server的hostname和ip配置到client的hosts文件中
+
+```
+192.168.236.136 td01
+```
+
+配置完成后，在命令行内使用taos shell连接server端
+
+```shell
+C:\TDengine>taos
+Welcome to the TDengine shell from Linux, Client Version:2.0.1.1
+Copyright (c) 2017 by TAOS Data, Inc. All rights reserved.
+
+taos> show databases;
+ name | created_time | ntables | vgroups | replica | quorum | days | keep1,keep2,keep(D) | cache(MB) | blocks | minrows | maxrows | wallevel | fsync | comp | precision | status |
+===================================================================================================================================================================================================================================================================
+ test | 2020-08-19 18:43:50.731 | 1 | 1 | 1 | 1 | 2 | 3650,3650,3650 | 16 | 6 | 100 | 4096 | 1 | 3000 | 2 | ms | ready |
+ log | 2020-08-19 18:40:28.064 | 4 | 1 | 1 | 1 | 10 | 30,30,30 | 1 | 3 | 100 | 4096 | 1 | 3000 | 2 | us | ready |
+Query OK, 2 row(s) in set (0.068000s)
+```
+
+如果windows上的client能够正常连接，并打印database信息，说明client可以正常连接server了。
+
+
+
+## 应用开发
+
+（1）新建maven工程，在pom.xml中引入taos-jdbcdriver依赖。
+
+```xml
+
+
+ 4.0.0
+
+ com.taosdata.demo
+ JdbcDemo
+ 1.0-SNAPSHOT
+
+
+
+ com.taosdata.jdbc
+ taos-jdbcdriver
+ 2.0.8
+
+
+
+```
+
+（2）使用jdbc查询TDengine数据库
+
+下面是示例代码：
+
+```java
+public class JdbcDemo {
+
+ public static void main(String[] args) throws Exception {
+ Connection conn = getConn();
+ Statement stmt = conn.createStatement();
+ // create database
+ stmt.executeUpdate("create database if not exists db");
+ // use database
+ stmt.executeUpdate("use db");
+ // create table
+ stmt.executeUpdate("create table if not exists tb (ts timestamp, temperature int, humidity float)");
+ // insert data
+ int affectedRows = stmt.executeUpdate("insert into tb values(now, 23, 10.3) (now + 1s, 20, 9.3)");
+ System.out.println("insert " + affectedRows + " rows.");
+ // query data
+ ResultSet resultSet = stmt.executeQuery("select * from tb");
+ Timestamp ts = null;
+ int temperature = 0;
+ float humidity = 0;
+ while(resultSet.next()){
+ ts = resultSet.getTimestamp(1);
+ temperature = resultSet.getInt(2);
+ humidity = resultSet.getFloat("humidity");
+ System.out.printf("%s, %d, %s\n", ts, temperature, humidity);
+ }
+ }
+
+ public static Connection getConn() throws Exception{
+ Class.forName("com.taosdata.jdbc.TSDBDriver");
+ String jdbcUrl = "jdbc:TAOS://td01:0/log?user=root&password=taosdata";
+ Properties connProps = new Properties();
+ connProps.setProperty(TSDBDriver.PROPERTY_KEY_CHARSET, "UTF-8");
+ connProps.setProperty(TSDBDriver.PROPERTY_KEY_LOCALE, "en_US.UTF-8");
+ connProps.setProperty(TSDBDriver.PROPERTY_KEY_TIME_ZONE, "UTC-8");
+ Connection conn = DriverManager.getConnection(jdbcUrl, connProps);
+ return conn;
+ }
+
+}
+```
+
+（3）测试jdbc访问tdengine的sever实例
+
+console输出：
+
+```
+insert 2 rows.
+2020-08-26 00:06:34.575, 23, 10.3
+2020-08-26 00:06:35.575, 20, 9.3
+```
+
+
+
+## 指南
+
+（1）如何设置主机名和hosts
+
+在server上查看hostname和fqdn
+```shell
+查看hostname
+# hostname
+taos-server
+
+查看fqdn
+# hostname -f
+taos-server
+```
+
+windows下hosts文件位于：
+C:\\Windows\System32\drivers\etc\hosts
+修改hosts文件，添加server的ip和hostname
+
+```s
+192.168.56.101 node5
+```
+
+（2）什么是fqdn？
+
+
+> 什么是FQDN？
+>
+> FQDN（Full qualified domain name）全限定域名，fqdn由2部分组成：hostname+domainname。
+>
+> 例如，一个邮件服务器的fqdn可能是：mymail.somecollege.edu，其中mymail是hostname（主机名），somcollege.edu是domainname（域名）。本例中，.edu是顶级域名，.somecollege是二级域名。
+>
+> 当连接服务器时，必须指定fqdn，然后，dns服务器通过查看dns表，将hostname解析为相应的ip地址。如果只指定hostname（不指定domainname），应用程序可能服务解析主机名。因为如果你试图访问不在本地的远程服务器时，本地的dns服务器和可能没有远程服务器的hostname列表。
+>
+> 参考：https://kb.iu.edu/d/aiuv
diff --git a/tests/pytest/fulltest.sh b/tests/pytest/fulltest.sh
index dadf918efd..294bc52a94 100755
--- a/tests/pytest/fulltest.sh
+++ b/tests/pytest/fulltest.sh
@@ -151,6 +151,7 @@ python3 ./test.py -f query/select_last_crash.py
python3 ./test.py -f query/queryNullValueTest.py
python3 ./test.py -f query/queryInsertValue.py
python3 ./test.py -f query/queryConnection.py
+python3 ./test.py -f query/queryCountCSVData.py
python3 ./test.py -f query/natualInterval.py
python3 ./test.py -f query/bug1471.py
diff --git a/tests/pytest/query/queryCountCSVData.py b/tests/pytest/query/queryCountCSVData.py
new file mode 100644
index 0000000000..6c73425fae
--- /dev/null
+++ b/tests/pytest/query/queryCountCSVData.py
@@ -0,0 +1,71 @@
+###################################################################
+# Copyright (c) 2016 by TAOS Technologies, Inc.
+# All rights reserved.
+#
+# This file is proprietary and confidential to TAOS Technologies.
+# No part of this file may be reproduced, stored, transmitted,
+# disclosed or used in any form or by any means other than as
+# expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+import sys
+import taos
+from util.log import tdLog
+from util.cases import tdCases
+from util.sql import tdSql
+from util.dnodes import tdDnodes
+
+
+class TDTestCase:
+ """
+ create table and insert data from disordered.csv which timestamp is disordered and
+ ordered.csv which timestamp is ordered.
+ then execute 'select count(*) from table xx;'
+ """
+
+ def init(self, conn, logSql):
+ tdLog.debug("start to execute %s" % __file__)
+ tdSql.init(conn.cursor(), logSql)
+
+ def run(self):
+ tdSql.prepare()
+
+ print("==============step1")
+ tdSql.execute("create database if not exists demo;");
+ tdSql.execute("use demo;")
+ tdSql.execute("CREATE TABLE IF NOT EXISTS test1 (ts TIMESTAMP, ValueID int, "
+ "VariantValue float, Quality int, Flags int);")
+ tdSql.execute("CREATE TABLE IF NOT EXISTS test2 (ts TIMESTAMP, ValueID int, "
+ "VariantValue float, Quality int, Flags int);")
+ ordered_csv = __file__.split('query')[0] + 'test_data/ordered.csv'
+ disordered_csv = __file__.split('query')[0] + 'test_data/disordered.csv'
+
+ tdSql.execute(" insert into test1 file '{file}';".format(file=ordered_csv))
+ tdSql.execute(" insert into test2 file '{file}';".format(file=disordered_csv))
+ print("==============insert into test1 and test2 form test file")
+
+
+ print("==============step2")
+ tdSql.query('select * from test1;')
+ with open(ordered_csv) as f1:
+ num1 = len(f1.readlines())
+ tdSql.checkRows(num1)
+
+
+ tdSql.query('select * from test2;')
+ with open(disordered_csv) as f2:
+ num2 = len(f2.readlines())
+ tdSql.checkRows(num2)
+ print("=============execute select count(*) from xxx")
+
+
+ def stop(self):
+ tdSql.close()
+ tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
diff --git a/tests/pytest/test_data/__init__.py b/tests/pytest/test_data/__init__.py
new file mode 100644
index 0000000000..1bd7af5b9d
--- /dev/null
+++ b/tests/pytest/test_data/__init__.py
@@ -0,0 +1,15 @@
+###################################################################
+# Copyright (c) 2016 by TAOS Technologies, Inc.
+# All rights reserved.
+#
+# This file is proprietary and confidential to TAOS Technologies.
+# No part of this file may be reproduced, stored, transmitted,
+# disclosed or used in any form or by any means other than as
+# expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+
+"""
+this directory contains test data files
+"""
\ No newline at end of file
diff --git a/tests/pytest/test_data/disordered.csv b/tests/pytest/test_data/disordered.csv
new file mode 100644
index 0000000000..0e6fd75e5b
--- /dev/null
+++ b/tests/pytest/test_data/disordered.csv
@@ -0,0 +1,500 @@
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diff --git a/tests/pytest/test_data/ordered.csv b/tests/pytest/test_data/ordered.csv
new file mode 100644
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