tsdb/cache: use read util's uid compare functor

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

@@ -1615,16 +1615,6 @@ static STableLoadInfo *getTableLoadInfo(SCacheRowsReader *pReader, uint64_t uid)
   return pInfo;
 }
 
-static int32_t uidComparFunc(const void *p1, const void *p2) {
-  uint64_t pu1 = *(uint64_t *)p1;
-  uint64_t pu2 = *(uint64_t *)p2;
-  if (pu1 == pu2) {
-    return 0;
-  } else {
-    return (pu1 < pu2) ? -1 : 1;
-  }
-}
-
 static uint64_t *getUidList(SCacheRowsReader *pReader) {
   if (!pReader->uidList) {
     int32_t numOfTables = pReader->numOfTables;

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

@@ -22,7 +22,7 @@
 #include "tsdbUtil2.h"
 #include "tsimplehash.h"
 
-static int32_t uidComparFunc(const void* p1, const void* p2) {
+int32_t uidComparFunc(const void* p1, const void* p2) {
   uint64_t pu1 = *(uint64_t*)p1;
   uint64_t pu2 = *(uint64_t*)p2;
   if (pu1 == pu2) {

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

@@ -215,6 +215,8 @@ typedef struct SBrinRecordIter {
   SBrinRecord      record;
 } SBrinRecordIter;
 
+int32_t uidComparFunc(const void* p1, const void* p2);
+
 STableBlockScanInfo* getTableBlockScanInfo(SSHashObj* pTableMap, uint64_t uid, const char* id);
 
 SSHashObj* createDataBlockScanInfo(STsdbReader* pTsdbReader, SBlockInfoBuf* pBuf, const STableKeyInfo* idList,