diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index 2ccf012bf195306bebc59bf7bcb3df10d5cd0404..08731a87d7ce800bae7fd9dc2215541843db2595 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -4401,7 +4401,7 @@ static void freeTableBlockDist(STableBlockDist *pTableBlockDist) {
   }
 }
 static int32_t getPercentileFromSortedArray(const SArray* pArray, float rate) {
-  int32_t len = taosArrayGetSize(pArray);
+  int32_t len = (int32_t)taosArrayGetSize(pArray);
   if (len <= 0) {
     return 0;
   }