xxq250
/
homework-jianmu
1
0
Fork 0
Code Issues Pull Requests 1 Actions Packages Projects Releases Wiki Activity

opt query performance.

This commit is contained in:
hjxilinx 2019-12-19 14:59:48 +08:00
parent 399fa20915
commit 5741c02651
1 changed files with 16 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
src/system/detail/src/vnodeQueryImpl.c
View File

@ -526,6 +526,13 @@ static int vnodeGetCompBlockInfo(SMeterObj *pMeterObj, SQueryRuntimeEnv *pRuntim
SCompInfo *compInfo = (SCompInfo *)(data + compHeader->compInfoOffset);
#else
SCompHeader *compHeader = (SCompHeader *)(buf + sizeof(SCompHeader) * pMeterObj->sid);
// no data in this file for specified meter, abort
if (compHeader->compInfoOffset == 0) {
free(buf);
return 0;
}
lseek(pVnodeFileInfo->headerFd, compHeader->compInfoOffset, SEEK_SET);
SCompInfo CompInfo = {0};
@ -547,8 +554,13 @@ static int vnodeGetCompBlockInfo(SMeterObj *pMeterObj, SQueryRuntimeEnv *pRuntim
vnodeFreeFieldsEx(pRuntimeEnv);
pQuery->numOfBlocks = (int32_t)compInfo->numOfBlocks;
/*
* +-------------+-----------+----------------+
* | comp block | checksum | SField Pointer |
* +-------------+-----------+----------------+
*/
int32_t compBlockSize = compInfo->numOfBlocks * sizeof(SCompBlock);
size_t bufferSize = compBlockSize + sizeof(TSCKSUM);
size_t bufferSize = compBlockSize + sizeof(TSCKSUM) + POINTER_BYTES * pQuery->numOfBlocks;
// prepare buffer to hold compblock data
if (pQuery->blockBufferSize != bufferSize) {
@ -562,7 +574,8 @@ static int vnodeGetCompBlockInfo(SMeterObj *pMeterObj, SQueryRuntimeEnv *pRuntim
memcpy(pQuery->pBlock, (char *)compInfo + sizeof(SCompInfo), (size_t)compBlockSize);
TSCKSUM checksum = *(TSCKSUM *)((char *)compInfo + sizeof(SCompInfo) + compBlockSize);
#else
read(pVnodeFileInfo->headerFd, pQuery->pBlock, bufferSize);
// read data: comp block + checksum
read(pVnodeFileInfo->headerFd, pQuery->pBlock, compBlockSize + sizeof(TSCKSUM));
TSCKSUM checksum = *(TSCKSUM*)((char*)pQuery->pBlock + compBlockSize);
// read(pVnodeFileInfo->headerFd, &checksum, sizeof(TSCKSUM));
#endif
@ -573,7 +586,7 @@ static int vnodeGetCompBlockInfo(SMeterObj *pMeterObj, SQueryRuntimeEnv *pRuntim
return -1; //TODO free resource in error process
}
pQuery->pFields = (SField **)((char *)pQuery->pBlock + compBlockSize);
pQuery->pFields = (SField **)((char *)pQuery->pBlock + compBlockSize + sizeof(TSCKSUM));
vnodeSetCompBlockInfoLoaded(pRuntimeEnv, fileIndex, pMeterObj->sid);
int64_t et = taosGetTimestampUs();