diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index e15caaf0e98edab90196d186dd875234ebed06e2..bda0a154251372327b68dfe997ac2587bc9580fb 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -4400,7 +4400,7 @@ static void freeTableBlockDist(STableBlockDist *pTableBlockDist) {
     free(pTableBlockDist);
   }
 }
-static int32_t getPercentileFromSortedArray(const SArray* pArray, float rate) {
+static int32_t getPercentileFromSortedArray(const SArray* pArray, double rate) {
   int32_t len = (int32_t)taosArrayGetSize(pArray);
   if (len <= 0) {
     return 0;