Merge branch 'feat/tsdb_refact' of https://github.com/taosdata/TDengine into feat/tsdb_snapshot

source/dnode/vnode/src/tsdb/tsdbCache.c

@@ -139,7 +139,11 @@ int32_t tsdbCacheInsertLastrow(SLRUCache *pCache, STsdb *pTsdb, tb_uid_t uid, ST
       } else {
         taosLRUCacheRelease(pCache, h, true);
         // tsdbCacheDeleteLastrow(pCache, uid, TSKEY_MAX);
-
+        if (dup) {
+          cacheRow = tdRowDup(row);
+        } else {
+          cacheRow = row;
+        }
         _taos_lru_deleter_t deleter = deleteTableCacheLastrow;
         LRUStatus status = taosLRUCacheInsert(pCache, key, keyLen, cacheRow, TD_ROW_LEN(cacheRow), deleter, NULL,
                                               TAOS_LRU_PRIORITY_LOW);

source/dnode/vnode/src/tsdb/tsdbReaderWriter.c

@@ -367,7 +367,7 @@ int32_t tsdbReadDelIdx(SDelFReader *pReader, SArray *aDelIdx, uint8_t **ppBuf) {
   int64_t  size = pReader->fDel.size - offset;
   uint32_t delimiter;
   uint8_t *pBuf = NULL;
-  SDelIdx *pDelIdx = &(SDelIdx){};
+  SDelIdx *pDelIdx = &(SDelIdx){0};
 
   if (!ppBuf) ppBuf = &pBuf;