refactor: do some internal refactor.

source/dnode/vnode/src/inc/tsdb.h

@@ -769,13 +769,13 @@ typedef struct SLDataIter {
   bool               ignoreEarlierTs;
 } SLDataIter;
 
+#define tMergeTreeGetRow(_t) ((_t)->pIter->rInfo.row)
 int32_t tMergeTreeOpen(SMergeTree *pMTree, int8_t backward, SDataFReader *pFReader, uint64_t suid, uint64_t uid,
                        STimeWindow *pTimeWindow, SVersionRange *pVerRange, SSttBlockLoadInfo *pBlockLoadInfo,
                        bool destroyLoadInfo, const char *idStr, bool strictTimeRange, SLDataIter* pLDataIter);
 void    tMergeTreeAddIter(SMergeTree *pMTree, SLDataIter *pIter);
 bool    tMergeTreeNext(SMergeTree *pMTree);
 bool    tMergeTreeIgnoreEarlierTs(SMergeTree *pMTree);
-TSDBROW tMergeTreeGetRow(SMergeTree *pMTree);
 void    tMergeTreeClose(SMergeTree *pMTree);
 
 SSttBlockLoadInfo *tCreateLastBlockLoadInfo(STSchema *pSchema, int16_t *colList, int32_t numOfCols, int32_t numOfStt);

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

@@ -647,8 +647,6 @@ bool tMergeTreeNext(SMergeTree *pMTree) {
   return pMTree->pIter != NULL;
 }
 
-TSDBROW tMergeTreeGetRow(SMergeTree *pMTree) { return pMTree->pIter->rInfo.row; }
-
 void tMergeTreeClose(SMergeTree *pMTree) {
   pMTree->pIter = NULL;
   if (pMTree->destroyLoadInfo) {