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enh(tsdb/cache): flag empty table when creating

This commit is contained in:
Minglei Jin 2024-02-01 17:40:32 +08:00
parent 086943ea5c
commit d59b767af3
3 changed files with 464 additions and 20 deletions
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7
source/dnode/vnode/src/inc/vnodeInt.h
View File

@ -214,6 +214,13 @@ int32_t tsdbBegin(STsdb* pTsdb);
// int32_t tsdbPrepareCommit(STsdb* pTsdb);
// int32_t tsdbCommit(STsdb* pTsdb, SCommitInfo* pInfo);
int32_t tsdbCacheCommit(STsdb* pTsdb);
int32_t tsdbCacheNewTable(STsdb* pTsdb, int64_t uid, tb_uid_t suid, SSchemaWrapper* pSchemaRow);
int32_t tsdbCacheDropTable(STsdb* pTsdb, int64_t uid, tb_uid_t suid, SSchemaWrapper* pSchemaRow);
int32_t tsdbCacheDropSubTables(STsdb* pTsdb, SArray* uids, tb_uid_t suid);
int32_t tsdbCacheNewSTableColumn(STsdb* pTsdb, SArray* uids, int16_t cid, int8_t col_type);
int32_t tsdbCacheDropSTableColumn(STsdb* pTsdb, SArray* uids, int16_t cid, int8_t col_type);
int32_t tsdbCacheNewNTableColumn(STsdb* pTsdb, int64_t uid, int16_t cid, int8_t col_type);
int32_t tsdbCacheDropNTableColumn(STsdb* pTsdb, int64_t uid, int16_t cid, int8_t col_type);
int32_t tsdbCompact(STsdb* pTsdb, SCompactInfo* pInfo);
int32_t tsdbRetention(STsdb* tsdb, int64_t now, int32_t sync);
int tsdbScanAndConvertSubmitMsg(STsdb* pTsdb, SSubmitReq2* pMsg);

109
source/dnode/vnode/src/meta/metaTable.c
View File

@ -303,6 +303,8 @@ int metaDropSTable(SMeta *pMeta, int64_t verison, SVDropStbReq *pReq, SArray *tb
tdbTbcClose(pCtbIdxc);
(void)tsdbCacheDropSubTables(pMeta->pVnode->pTsdb, tbUidList, pReq->suid);
metaWLock(pMeta);
for (int32_t iChild = 0; iChild < taosArrayGetSize(tbUidList); iChild++) {
@ -334,6 +336,40 @@ _exit:
return 0;
}
static void metaGetSubtables(SMeta *pMeta, int64_t suid, SArray *uids) {
if (!uids) return;
int c = 0;
void *pKey = NULL;
int nKey = 0;
TBC *pCtbIdxc = NULL;
tdbTbcOpen(pMeta->pCtbIdx, &pCtbIdxc, NULL);
int rc = tdbTbcMoveTo(pCtbIdxc, &(SCtbIdxKey){.suid = suid, .uid = INT64_MIN}, sizeof(SCtbIdxKey), &c);
if (rc < 0) {
tdbTbcClose(pCtbIdxc);
metaWLock(pMeta);
return;
}
for (;;) {
rc = tdbTbcNext(pCtbIdxc, &pKey, &nKey, NULL, NULL);
if (rc < 0) break;
if (((SCtbIdxKey *)pKey)->suid < suid) {
continue;
} else if (((SCtbIdxKey *)pKey)->suid > suid) {
break;
}
taosArrayPush(uids, &(((SCtbIdxKey *)pKey)->uid));
}
tdbFree(pKey);
tdbTbcClose(pCtbIdxc);
}
int metaAlterSTable(SMeta *pMeta, int64_t version, SVCreateStbReq *pReq) {
SMetaEntry oStbEntry = {0};
SMetaEntry nStbEntry = {0};
@ -397,9 +433,39 @@ int metaAlterSTable(SMeta *pMeta, int64_t version, SVCreateStbReq *pReq) {
nStbEntry.stbEntry.schemaRow = pReq->schemaRow;
nStbEntry.stbEntry.schemaTag = pReq->schemaTag;
int32_t deltaCol = pReq->schemaRow.nCols - oStbEntry.stbEntry.schemaRow.nCols;
int nCols = pReq->schemaRow.nCols;
int onCols = oStbEntry.stbEntry.schemaRow.nCols;
int32_t deltaCol = nCols - onCols;
bool updStat = deltaCol != 0 && !metaTbInFilterCache(pMeta, pReq->name, 1);
if (!TSDB_CACHE_NO(pMeta->pVnode->config)) {
STsdb *pTsdb = pMeta->pVnode->pTsdb;
SArray *uids = taosArrayInit(8, sizeof(int64_t));
if (deltaCol == 1) {
int16_t cid = pReq->schemaRow.pSchema[nCols - 1].colId;
int8_t col_type = pReq->schemaRow.pSchema[nCols - 1].type;
metaGetSubtables(pMeta, pReq->suid, uids);
tsdbCacheNewSTableColumn(pTsdb, uids, cid, col_type);
} else if (deltaCol == -1) {
int16_t cid = -1;
int8_t col_type = -1;
for (int i = 0, j = 0; i < nCols && j < onCols; ++i, ++j) {
if (pReq->schemaRow.pSchema[i].colId != oStbEntry.stbEntry.schemaRow.pSchema[j].colId) {
cid = oStbEntry.stbEntry.schemaRow.pSchema[j].colId;
col_type = oStbEntry.stbEntry.schemaRow.pSchema[j].type;
break;
}
}
if (cid != -1) {
metaGetSubtables(pMeta, pReq->suid, uids);
tsdbCacheDropSTableColumn(pTsdb, uids, cid, col_type);
}
}
if (uids) taosArrayDestroy(uids);
}
metaWLock(pMeta);
// compare two entry
if (oStbEntry.stbEntry.schemaRow.version != pReq->schemaRow.version) {
@ -822,6 +888,10 @@ int metaCreateTable(SMeta *pMeta, int64_t ver, SVCreateTbReq *pReq, STableMetaRs
metaUidCacheClear(pMeta, me.ctbEntry.suid);
metaTbGroupCacheClear(pMeta, me.ctbEntry.suid);
metaULock(pMeta);
if (!TSDB_CACHE_NO(pMeta->pVnode->config)) {
tsdbCacheNewTable(pMeta->pVnode->pTsdb, me.uid, me.ctbEntry.suid, NULL);
}
} else {
me.ntbEntry.btime = pReq->btime;
me.ntbEntry.ttlDays = pReq->ttl;
@ -832,6 +902,10 @@ int metaCreateTable(SMeta *pMeta, int64_t ver, SVCreateTbReq *pReq, STableMetaRs
++pStats->numOfNTables;
pStats->numOfNTimeSeries += me.ntbEntry.schemaRow.nCols - 1;
if (!TSDB_CACHE_NO(pMeta->pVnode->config)) {
tsdbCacheNewTable(pMeta->pVnode->pTsdb, me.uid, -1, &me.ntbEntry.schemaRow);
}
}
if (metaHandleEntry(pMeta, &me) < 0) goto _err;
@ -896,6 +970,10 @@ int metaDropTable(SMeta *pMeta, int64_t version, SVDropTbReq *pReq, SArray *tbUi
if ((type == TSDB_CHILD_TABLE || type == TSDB_NORMAL_TABLE) && tbUids) {
taosArrayPush(tbUids, &uid);
if (!TSDB_CACHE_NO(pMeta->pVnode->config)) {
tsdbCacheDropTable(pMeta->pVnode->pTsdb, uid, suid, NULL);
}
}
if ((type == TSDB_CHILD_TABLE) && tbUid) {
@ -930,6 +1008,11 @@ void metaDropTables(SMeta *pMeta, SArray *tbUids) {
}
tSimpleHashPut(suidHash, &suid, sizeof(tb_uid_t), &nCtbDropped, sizeof(int64_t));
}
if (!TSDB_CACHE_NO(pMeta->pVnode->config)) {
tsdbCacheDropTable(pMeta->pVnode->pTsdb, uid, suid, NULL);
}
metaDebug("batch drop table:%" PRId64, uid);
}
metaULock(pMeta);
@ -1172,11 +1255,22 @@ static int metaDropTableByUid(SMeta *pMeta, tb_uid_t uid, int *type, tb_uid_t *p
metaUpdateStbStats(pMeta, e.ctbEntry.suid, -1, 0);
metaUidCacheClear(pMeta, e.ctbEntry.suid);
metaTbGroupCacheClear(pMeta, e.ctbEntry.suid);
/*
if (!TSDB_CACHE_NO(pMeta->pVnode->config)) {
tsdbCacheDropTable(pMeta->pVnode->pTsdb, e.uid, e.ctbEntry.suid, NULL);
}
*/
} else if (e.type == TSDB_NORMAL_TABLE) {
// drop schema.db (todo)
--pMeta->pVnode->config.vndStats.numOfNTables;
pMeta->pVnode->config.vndStats.numOfNTimeSeries -= e.ntbEntry.schemaRow.nCols - 1;
/*
if (!TSDB_CACHE_NO(pMeta->pVnode->config)) {
tsdbCacheDropTable(pMeta->pVnode->pTsdb, e.uid, -1, &e.ntbEntry.schemaRow);
}
*/
} else if (e.type == TSDB_SUPER_TABLE) {
tdbTbDelete(pMeta->pSuidIdx, &e.uid, sizeof(tb_uid_t), pMeta->txn);
// drop schema.db (todo)
@ -1364,6 +1458,12 @@ static int metaAlterTableColumn(SMeta *pMeta, int64_t version, SVAlterTbReq *pAl
++pMeta->pVnode->config.vndStats.numOfNTimeSeries;
metaTimeSeriesNotifyCheck(pMeta);
if (!TSDB_CACHE_NO(pMeta->pVnode->config)) {
int16_t cid = pSchema->pSchema[entry.ntbEntry.schemaRow.nCols - 1].colId;
int8_t col_type = pSchema->pSchema[entry.ntbEntry.schemaRow.nCols - 1].type;
(void)tsdbCacheNewNTableColumn(pMeta->pVnode->pTsdb, entry.uid, cid, col_type);
}
break;
case TSDB_ALTER_TABLE_DROP_COLUMN:
if (pColumn == NULL) {
@ -1386,6 +1486,13 @@ static int metaAlterTableColumn(SMeta *pMeta, int64_t version, SVAlterTbReq *pAl
pSchema->nCols--;
--pMeta->pVnode->config.vndStats.numOfNTimeSeries;
if (!TSDB_CACHE_NO(pMeta->pVnode->config)) {
int16_t cid = pColumn->colId;
int8_t col_type = pColumn->type;
(void)tsdbCacheDropNTableColumn(pMeta->pVnode->pTsdb, entry.uid, cid, col_type);
}
break;
case TSDB_ALTER_TABLE_UPDATE_COLUMN_BYTES:
if (pColumn == NULL) {

368
source/dnode/vnode/src/tsdb/tsdbCache.c
View File

@ -431,25 +431,6 @@ int32_t tsdbCacheCommit(STsdb *pTsdb) {
return code;
}
static SLastCol *tsdbCacheLookup(STsdb *pTsdb, tb_uid_t uid, int16_t cid, int8_t ltype) {
SLastCol *pLastCol = NULL;
char *err = NULL;
size_t vlen = 0;
SLastKey *key = &(SLastKey){.ltype = ltype, .uid = uid, .cid = cid};
size_t klen = ROCKS_KEY_LEN;
char *value = NULL;
value = rocksdb_get(pTsdb->rCache.db, pTsdb->rCache.readoptions, (char *)key, klen, &vlen, &err);
if (NULL != err) {
tsdbError("vgId:%d, %s failed at line %d since %s", TD_VID(pTsdb->pVnode), __func__, __LINE__, err);
rocksdb_free(err);
}
pLastCol = tsdbCacheDeserialize(value);
return pLastCol;
}
static void reallocVarData(SColVal *pColVal) {
if (IS_VAR_DATA_TYPE(pColVal->type)) {
uint8_t *pVal = pColVal->value.pData;
@ -476,6 +457,355 @@ static void tsdbCacheDeleter(const void *key, size_t klen, void *value, void *ud
taosMemoryFree(value);
}
static int32_t tsdbCacheNewTableColumn(STsdb *pTsdb, int64_t uid, int16_t cid, int8_t col_type, int8_t ltype) {
int32_t code = 0;
SLRUCache *pCache = pTsdb->lruCache;
rocksdb_writebatch_t *wb = pTsdb->rCache.writebatch;
SLastCol noneCol = {.ts = TSKEY_MIN, .colVal = COL_VAL_NONE(cid, col_type), .dirty = 1};
SLastCol *pLastCol = &noneCol;
SLastCol *pTmpLastCol = taosMemoryCalloc(1, sizeof(SLastCol));
*pTmpLastCol = *pLastCol;
pLastCol = pTmpLastCol;
reallocVarData(&pLastCol->colVal);
size_t charge = sizeof(*pLastCol);
if (IS_VAR_DATA_TYPE(pLastCol->colVal.type)) {
charge += pLastCol->colVal.value.nData;
}
SLastKey *pLastKey = &(SLastKey){.ltype = ltype, .uid = uid, .cid = cid};
LRUStatus status = taosLRUCacheInsert(pCache, pLastKey, ROCKS_KEY_LEN, pLastCol, charge, tsdbCacheDeleter, NULL,
TAOS_LRU_PRIORITY_LOW, &pTsdb->flushState);
if (status != TAOS_LRU_STATUS_OK) {
code = -1;
}
/*
// store result back to rocks cache
char *value = NULL;
size_t vlen = 0;
tsdbCacheSerialize(pLastCol, &value, &vlen);
SLastKey *key = pLastKey;
size_t klen = ROCKS_KEY_LEN;
rocksdb_writebatch_put(wb, (char *)key, klen, value, vlen);
taosMemoryFree(value);
*/
return code;
}
int32_t tsdbCacheCommitNoLock(STsdb *pTsdb) {
int32_t code = 0;
char *err = NULL;
SLRUCache *pCache = pTsdb->lruCache;
rocksdb_writebatch_t *wb = pTsdb->rCache.writebatch;
taosLRUCacheApply(pCache, tsdbCacheFlushDirty, &pTsdb->flushState);
rocksMayWrite(pTsdb, true, false, false);
rocksMayWrite(pTsdb, true, true, false);
rocksdb_flush(pTsdb->rCache.db, pTsdb->rCache.flushoptions, &err);
if (NULL != err) {
tsdbError("vgId:%d, %s failed at line %d since %s", TD_VID(pTsdb->pVnode), __func__, __LINE__, err);
rocksdb_free(err);
code = -1;
}
return code;
}
static int32_t tsdbCacheDropTableColumn(STsdb *pTsdb, int64_t uid, int16_t cid, int8_t col_type, int8_t ltype) {
int32_t code = 0;
// build keys & multi get from rocks
char **keys_list = taosMemoryCalloc(2, sizeof(char *));
size_t *keys_list_sizes = taosMemoryCalloc(2, sizeof(size_t));
const size_t klen = ROCKS_KEY_LEN;
char *keys = taosMemoryCalloc(2, sizeof(SLastKey));
((SLastKey *)keys)[0] = (SLastKey){.ltype = 1, .uid = uid, .cid = cid};
((SLastKey *)keys)[1] = (SLastKey){.ltype = 0, .uid = uid, .cid = cid};
keys_list[0] = keys;
keys_list[1] = keys + sizeof(SLastKey);
keys_list_sizes[0] = klen;
keys_list_sizes[1] = klen;
char **values_list = taosMemoryCalloc(2, sizeof(char *));
size_t *values_list_sizes = taosMemoryCalloc(2, sizeof(size_t));
char **errs = taosMemoryCalloc(2, sizeof(char *));
// rocksMayWrite(pTsdb, true, false, false);
rocksdb_multi_get(pTsdb->rCache.db, pTsdb->rCache.readoptions, 2, (const char *const *)keys_list, keys_list_sizes,
values_list, values_list_sizes, errs);
for (int i = 0; i < 2; ++i) {
if (errs[i]) {
rocksdb_free(errs[i]);
}
}
taosMemoryFree(errs);
rocksdb_writebatch_t *wb = pTsdb->rCache.writebatch;
{
SLastCol *pLastCol = tsdbCacheDeserialize(values_list[0]);
if (NULL != pLastCol) {
rocksdb_writebatch_delete(wb, keys_list[0], klen);
}
pLastCol = tsdbCacheDeserialize(values_list[1]);
if (NULL != pLastCol) {
rocksdb_writebatch_delete(wb, keys_list[1], klen);
}
rocksdb_free(values_list[0]);
rocksdb_free(values_list[1]);
bool erase = false;
LRUHandle *h = taosLRUCacheLookup(pTsdb->lruCache, keys_list[0], klen);
if (h) {
SLastCol *pLastCol = (SLastCol *)taosLRUCacheValue(pTsdb->lruCache, h);
erase = true;
taosLRUCacheRelease(pTsdb->lruCache, h, erase);
}
if (erase) {
taosLRUCacheErase(pTsdb->lruCache, keys_list[0], klen);
}
erase = false;
h = taosLRUCacheLookup(pTsdb->lruCache, keys_list[1], klen);
if (h) {
SLastCol *pLastCol = (SLastCol *)taosLRUCacheValue(pTsdb->lruCache, h);
erase = true;
taosLRUCacheRelease(pTsdb->lruCache, h, erase);
}
if (erase) {
taosLRUCacheErase(pTsdb->lruCache, keys_list[1], klen);
}
}
taosMemoryFree(keys_list[0]);
taosMemoryFree(keys_list);
taosMemoryFree(keys_list_sizes);
taosMemoryFree(values_list);
taosMemoryFree(values_list_sizes);
return code;
}
int32_t tsdbCacheNewTable(STsdb *pTsdb, tb_uid_t uid, tb_uid_t suid, SSchemaWrapper *pSchemaRow) {
int32_t code = 0;
taosThreadMutexLock(&pTsdb->lruMutex);
if (suid < 0) {
int nCols = pSchemaRow->nCols;
for (int i = 0; i < nCols; ++i) {
int16_t cid = pSchemaRow->pSchema[i].colId;
int8_t col_type = pSchemaRow->pSchema[i].type;
(void)tsdbCacheNewTableColumn(pTsdb, uid, cid, col_type, 0);
(void)tsdbCacheNewTableColumn(pTsdb, uid, cid, col_type, 1);
}
} else {
STSchema *pTSchema = NULL;
code = metaGetTbTSchemaEx(pTsdb->pVnode->pMeta, suid, uid, -1, &pTSchema);
if (code != TSDB_CODE_SUCCESS) {
terrno = code;
return -1;
}
int nCols = pTSchema->numOfCols;
for (int i = 0; i < nCols; ++i) {
int16_t cid = pTSchema->columns[i].colId;
int8_t col_type = pTSchema->columns[i].type;
(void)tsdbCacheNewTableColumn(pTsdb, uid, cid, col_type, 0);
(void)tsdbCacheNewTableColumn(pTsdb, uid, cid, col_type, 1);
}
taosMemoryFree(pTSchema);
}
taosThreadMutexUnlock(&pTsdb->lruMutex);
return code;
}
int32_t tsdbCacheDropTable(STsdb *pTsdb, tb_uid_t uid, tb_uid_t suid, SSchemaWrapper *pSchemaRow) {
int32_t code = 0;
taosThreadMutexLock(&pTsdb->lruMutex);
(void)tsdbCacheCommitNoLock(pTsdb);
if (suid < 0) {
int nCols = pSchemaRow->nCols;
for (int i = 0; i < nCols; ++i) {
int16_t cid = pSchemaRow->pSchema[i].colId;
int8_t col_type = pSchemaRow->pSchema[i].type;
(void)tsdbCacheDropTableColumn(pTsdb, uid, cid, col_type, 0);
(void)tsdbCacheDropTableColumn(pTsdb, uid, cid, col_type, 1);
}
} else {
STSchema *pTSchema = NULL;
code = metaGetTbTSchemaEx(pTsdb->pVnode->pMeta, suid, uid, -1, &pTSchema);
if (code != TSDB_CODE_SUCCESS) {
terrno = code;
return -1;
}
int nCols = pTSchema->numOfCols;
for (int i = 0; i < nCols; ++i) {
int16_t cid = pTSchema->columns[i].colId;
int8_t col_type = pTSchema->columns[i].type;
(void)tsdbCacheDropTableColumn(pTsdb, uid, cid, col_type, 0);
(void)tsdbCacheDropTableColumn(pTsdb, uid, cid, col_type, 1);
}
taosMemoryFree(pTSchema);
}
rocksMayWrite(pTsdb, true, false, false);
taosThreadMutexUnlock(&pTsdb->lruMutex);
return code;
}
int32_t tsdbCacheDropSubTables(STsdb *pTsdb, SArray *uids, tb_uid_t suid) {
int32_t code = 0;
taosThreadMutexLock(&pTsdb->lruMutex);
(void)tsdbCacheCommitNoLock(pTsdb);
STSchema *pTSchema = NULL;
code = metaGetTbTSchemaEx(pTsdb->pVnode->pMeta, suid, suid, -1, &pTSchema);
if (code != TSDB_CODE_SUCCESS) {
terrno = code;
return -1;
}
for (int i = 0; i < TARRAY_SIZE(uids); ++i) {
int64_t uid = ((tb_uid_t *)TARRAY_DATA(uids))[i];
int nCols = pTSchema->numOfCols;
for (int i = 0; i < nCols; ++i) {
int16_t cid = pTSchema->columns[i].colId;
int8_t col_type = pTSchema->columns[i].type;
(void)tsdbCacheDropTableColumn(pTsdb, uid, cid, col_type, 0);
(void)tsdbCacheDropTableColumn(pTsdb, uid, cid, col_type, 1);
}
}
taosMemoryFree(pTSchema);
rocksMayWrite(pTsdb, true, false, false);
taosThreadMutexUnlock(&pTsdb->lruMutex);
return code;
}
int32_t tsdbCacheNewNTableColumn(STsdb *pTsdb, int64_t uid, int16_t cid, int8_t col_type) {
int32_t code = 0;
taosThreadMutexLock(&pTsdb->lruMutex);
(void)tsdbCacheNewTableColumn(pTsdb, uid, cid, col_type, 0);
(void)tsdbCacheNewTableColumn(pTsdb, uid, cid, col_type, 1);
// rocksMayWrite(pTsdb, true, false, false);
taosThreadMutexUnlock(&pTsdb->lruMutex);
//(void)tsdbCacheCommit(pTsdb);
return code;
}
int32_t tsdbCacheDropNTableColumn(STsdb *pTsdb, int64_t uid, int16_t cid, int8_t col_type) {
int32_t code = 0;
taosThreadMutexLock(&pTsdb->lruMutex);
(void)tsdbCacheCommitNoLock(pTsdb);
(void)tsdbCacheDropTableColumn(pTsdb, uid, cid, col_type, 0);
(void)tsdbCacheDropTableColumn(pTsdb, uid, cid, col_type, 1);
rocksMayWrite(pTsdb, true, false, true);
taosThreadMutexUnlock(&pTsdb->lruMutex);
return code;
}
int32_t tsdbCacheNewSTableColumn(STsdb *pTsdb, SArray *uids, int16_t cid, int8_t col_type) {
int32_t code = 0;
taosThreadMutexLock(&pTsdb->lruMutex);
for (int i = 0; i < TARRAY_SIZE(uids); ++i) {
tb_uid_t uid = ((tb_uid_t *)TARRAY_DATA(uids))[i];
(void)tsdbCacheNewTableColumn(pTsdb, uid, cid, col_type, 0);
(void)tsdbCacheNewTableColumn(pTsdb, uid, cid, col_type, 1);
}
// rocksMayWrite(pTsdb, true, false, false);
taosThreadMutexUnlock(&pTsdb->lruMutex);
//(void)tsdbCacheCommit(pTsdb);
return code;
}
int32_t tsdbCacheDropSTableColumn(STsdb *pTsdb, SArray *uids, int16_t cid, int8_t col_type) {
int32_t code = 0;
taosThreadMutexLock(&pTsdb->lruMutex);
(void)tsdbCacheCommitNoLock(pTsdb);
for (int i = 0; i < TARRAY_SIZE(uids); ++i) {
int64_t uid = ((tb_uid_t *)TARRAY_DATA(uids))[i];
(void)tsdbCacheDropTableColumn(pTsdb, uid, cid, col_type, 0);
(void)tsdbCacheDropTableColumn(pTsdb, uid, cid, col_type, 1);
}
rocksMayWrite(pTsdb, true, false, true);
taosThreadMutexUnlock(&pTsdb->lruMutex);
return code;
}
static SLastCol *tsdbCacheLookup(STsdb *pTsdb, tb_uid_t uid, int16_t cid, int8_t ltype) {
SLastCol *pLastCol = NULL;
char *err = NULL;
size_t vlen = 0;
SLastKey *key = &(SLastKey){.ltype = ltype, .uid = uid, .cid = cid};
size_t klen = ROCKS_KEY_LEN;
char *value = NULL;
value = rocksdb_get(pTsdb->rCache.db, pTsdb->rCache.readoptions, (char *)key, klen, &vlen, &err);
if (NULL != err) {
tsdbError("vgId:%d, %s failed at line %d since %s", TD_VID(pTsdb->pVnode), __func__, __LINE__, err);
rocksdb_free(err);
}
pLastCol = tsdbCacheDeserialize(value);
return pLastCol;
}
typedef struct {
int idx;
SLastKey key;