fix(cache/read): associate tbname with primary ts column

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

@@ -343,6 +343,14 @@ int32_t tsdbRetrieveCacheRows(void* pReader, SSDataBlock* pResBlock, const int32
 
             hasRes = true;
             p->ts = pColVal->ts;
+            if (k == 0) {
+              if (TARRAY_SIZE(pTableUidList) == 0) {
+                taosArrayPush(pTableUidList, &pKeyInfo->uid);
+              } else {
+                taosArraySet(pTableUidList, 0, &pKeyInfo->uid);
+              }
+            }
+
             if (pColVal->ts < singleTableLastTs && HASTYPE(pr->type, CACHESCAN_RETRIEVE_LAST)) {
               singleTableLastTs = pColVal->ts;
             }
@@ -373,12 +381,6 @@ int32_t tsdbRetrieveCacheRows(void* pReader, SSDataBlock* pResBlock, const int32
         }
       }
 
-      if (TARRAY_SIZE(pTableUidList) == 0) {
-        taosArrayPush(pTableUidList, &pKeyInfo->uid);
-      } else {
-        taosArraySet(pTableUidList, 0, &pKeyInfo->uid);
-      }
-
       // taosArrayClearEx(pRow, freeItem);
       taosArrayClear(pRow);
     }