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enh(query): opt last row read performance.

This commit is contained in:
Haojun Liao 2023-04-24 16:08:49 +08:00
parent 5663550de2
commit d73306f616
1 changed files with 29 additions and 23 deletions
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52
source/dnode/vnode/src/tsdb/tsdbRead.c
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@ -741,7 +741,6 @@ static int32_t tsdbReaderCreate(SVnode* pVnode, SQueryTableDataCond* pCond, STsd
pReader->type = pCond->type;
pReader->window = updateQueryTimeWindow(pReader->pTsdb, &pCond->twindows);
pReader->blockInfoBuf.numPerBucket = 1000; // 1000 tables per bucket
pReader->status.pLDataIter = taosMemoryCalloc(pVnode->config.sttTrigger, sizeof(SLDataIter));
if (pReader->pResBlock == NULL) {
pReader->freeBlock = true;
@ -774,6 +773,12 @@ static int32_t tsdbReaderCreate(SVnode* pVnode, SQueryTableDataCond* pCond, STsd
goto _end;
}
pReader->status.pLDataIter = taosMemoryCalloc(pVnode->config.sttTrigger, sizeof(SLDataIter));
if (pReader->status.pLDataIter == NULL) {
terrno = TSDB_CODE_OUT_OF_MEMORY;
goto _end;
}
setColumnIdSlotList(pSup, pCond->colList, pCond->pSlotList, pCond->numOfCols);
tsdbInitReaderLock(pReader);
@ -4368,29 +4373,38 @@ _err:
return code;
}
static void clearSharedPtr(STsdbReader* p) {
p->status.pLDataIter = NULL;
p->status.pTableMap = NULL;
p->status.uidList.tableUidList = NULL;
p->pReadSnap = NULL;
p->pSchema = NULL;
p->pSchemaMap = NULL;
}
static void setSharedPtr(STsdbReader* pDst, const STsdbReader* pSrc) {
pDst->status.pTableMap = pSrc->status.pTableMap;
pDst->status.pLDataIter = pSrc->status.pLDataIter;
pDst->status.uidList = pSrc->status.uidList;
pDst->pSchema = pSrc->pSchema;
pDst->pSchemaMap = pSrc->pSchemaMap;
pDst->pReadSnap = pSrc->pReadSnap;
}
void tsdbReaderClose(STsdbReader* pReader) {
if (pReader == NULL) {
return;
}
tsdbAcquireReader(pReader);
{
if (pReader->innerReader[0] != NULL || pReader->innerReader[1] != NULL) {
STsdbReader* p = pReader->innerReader[0];
p->status.pTableMap = NULL;
p->status.uidList.tableUidList = NULL;
p->pReadSnap = NULL;
p->pSchema = NULL;
p->pSchemaMap = NULL;
clearSharedPtr(p);
p = pReader->innerReader[1];
p->status.pTableMap = NULL;
p->status.uidList.tableUidList = NULL;
p->pReadSnap = NULL;
p->pSchema = NULL;
p->pSchemaMap = NULL;
clearSharedPtr(p);
tsdbReaderClose(pReader->innerReader[0]);
tsdbReaderClose(pReader->innerReader[1]);
@ -4627,18 +4641,10 @@ int32_t tsdbReaderResume(STsdbReader* pReader) {
// we need only one row
pPrevReader->capacity = 1;
pPrevReader->status.pTableMap = pReader->status.pTableMap;
pPrevReader->status.uidList = pReader->status.uidList;
pPrevReader->pSchema = pReader->pSchema;
pPrevReader->pSchemaMap = pReader->pSchemaMap;
pPrevReader->pReadSnap = pReader->pReadSnap;
setSharedPtr(pPrevReader, pReader);
pNextReader->capacity = 1;
pNextReader->status.pTableMap = pReader->status.pTableMap;
pNextReader->status.uidList = pReader->status.uidList;
pNextReader->pSchema = pReader->pSchema;
pNextReader->pSchemaMap = pReader->pSchemaMap;
pNextReader->pReadSnap = pReader->pReadSnap;
setSharedPtr(pNextReader, pReader);
code = doOpenReaderImpl(pPrevReader);
if (code != TSDB_CODE_SUCCESS) {