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enh: optimize last pruning logic

This commit is contained in:
Xiaoyu Wang 2023-03-19 13:41:32 +08:00
parent 528dcf86eb
commit 6277b2564b
1 changed files with 8 additions and 8 deletions
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16
source/dnode/vnode/src/tsdb/tsdbCacheRead.c
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@ -332,7 +332,7 @@ int32_t tsdbRetrieveCacheRows(void* pReader, SSDataBlock* pResBlock, const int32
// retrieve the only one last row of all tables in the uid list.
if (HASTYPE(pr->type, CACHESCAN_RETRIEVE_TYPE_SINGLE)) {
int64_t st = taosGetTimestampUs();
int64_t totalMinTs = INT64_MAX;
int64_t totalLastTs = INT64_MAX;
for (int32_t i = 0; i < pr->numOfTables; ++i) {
STableKeyInfo* pKeyInfo = &pr->pTableList[i];
@ -351,7 +351,7 @@ int32_t tsdbRetrieveCacheRows(void* pReader, SSDataBlock* pResBlock, const int32
{
bool hasNotNullRow = true;
int64_t minTs = INT64_MAX;
int64_t singleTableLastTs = INT64_MAX;
for (int32_t k = 0; k < pr->numOfCols; ++k) {
int32_t slotId = slotIds[k];
@ -362,7 +362,7 @@ int32_t tsdbRetrieveCacheRows(void* pReader, SSDataBlock* pResBlock, const int32
hasRes = true;
p->ts = pCol->ts;
p->colVal = pCol->colVal;
minTs = pCol->ts;
singleTableLastTs = pCol->ts;
// only set value for last row query
if (HASTYPE(pr->type, CACHESCAN_RETRIEVE_LAST_ROW)) {
@ -387,8 +387,8 @@ int32_t tsdbRetrieveCacheRows(void* pReader, SSDataBlock* pResBlock, const int32
hasRes = true;
p->ts = pColVal->ts;
if (pColVal->ts < minTs && HASTYPE(pr->type, CACHESCAN_RETRIEVE_LAST)) {
minTs = pColVal->ts;
if (pColVal->ts < singleTableLastTs && HASTYPE(pr->type, CACHESCAN_RETRIEVE_LAST)) {
singleTableLastTs = pColVal->ts;
}
if (!IS_VAR_DATA_TYPE(pColVal->colVal.type)) {
@ -408,12 +408,12 @@ int32_t tsdbRetrieveCacheRows(void* pReader, SSDataBlock* pResBlock, const int32
}
if (hasNotNullRow) {
if (totalMinTs > minTs) {
totalMinTs = minTs;
if (INT64_MAX == totalLastTs || totalLastTs < singleTableLastTs) {
totalLastTs = singleTableLastTs;
}
double cost = (taosGetTimestampUs() - st) / 1000.0;
if (cost > tsCacheLazyLoadThreshold) {
pr->lastTs = totalMinTs;
pr->lastTs = totalLastTs;
}
}
}