diff --git a/source/client/src/clientImpl.c b/source/client/src/clientImpl.c
index 90251218540230aaf1e7583b6d989cb06520ec87..65a91fe42642346a66b4f399fac89dbb849cb447 100644
--- a/source/client/src/clientImpl.c
+++ b/source/client/src/clientImpl.c
@@ -692,6 +692,7 @@ void launchAsyncQuery(SRequestObj* pRequest, SQuery* pQuery) {
 
       if (TSDB_CODE_SUCCESS == code) {
         code = qCreateQueryPlan(&cxt, &pRequest->body.pDag, pNodeList);
+        tscError("0x%"PRIx64" failed to create query plan, code:%s 0x%"PRIx64, pRequest->self, tstrerror(code), pRequest->requestId);
       }
 
       if (TSDB_CODE_SUCCESS == code) {
diff --git a/source/libs/function/src/tpercentile.c b/source/libs/function/src/tpercentile.c
index 90d0640f403ef3be0949f52d1313b715b225ced0..b40dd8b78da4860c18df56b3c0da7f668a2ce5d1 100644
--- a/source/libs/function/src/tpercentile.c
+++ b/source/libs/function/src/tpercentile.c
@@ -127,9 +127,11 @@ int32_t tBucketIntHash(tMemBucket *pBucket, const void *value) {
     int64_t delta = v - pBucket->range.i64MinVal;
     index = (delta % pBucket->numOfSlots);
   } else {
-    double slotSpan = (double)span / pBucket->numOfSlots;
-    index = (int32_t)((v - pBucket->range.i64MinVal) / slotSpan);
-    if (v == pBucket->range.i64MaxVal) {
+    double slotSpan = ((double)span) / pBucket->numOfSlots;
+    uint64_t delta = v - pBucket->range.i64MinVal;
+
+    index = (int32_t)(delta / slotSpan);
+    if (v == pBucket->range.i64MaxVal || index == pBucket->numOfSlots) {
       index -= 1;
     }
   }
@@ -324,7 +326,6 @@ int32_t tMemBucketPut(tMemBucket *pBucket, const void *data, size_t size) {
   int32_t bytes = pBucket->bytes;
   for (int32_t i = 0; i < size; ++i) {
     char *d = (char *) data + i * bytes;
-
     int32_t index = (pBucket->hashFunc)(pBucket, d);
     if (index < 0) {
       continue;