[TS-1318]<fix>: fixed a compilation error

src/client/src/tscSubquery.c

@@ -1213,7 +1213,7 @@ static int32_t getIntersectionOfTableTuple(SQueryInfo* pQueryInfo, SSqlObj* pPar
   for (int32_t i = 0; i < joinNum; ++i) {
     // reorganize the tid-tag value according to both the vgroup id and tag values
     // sort according to the tag value
-    size_t num = taosArrayGetSize(ctxlist[i].res);
+    int32_t num = (int32_t) taosArrayGetSize(ctxlist[i].res);
 
     int32_t ret = tidTagsMergeSort(ctxlist[i].res, 0, num - 1, size);
     if (ret != TSDB_CODE_SUCCESS) {