diff --git a/source/libs/function/src/builtinsimpl.c b/source/libs/function/src/builtinsimpl.c
index a7b12bfcc4..0019669428 100644
--- a/source/libs/function/src/builtinsimpl.c
+++ b/source/libs/function/src/builtinsimpl.c
@@ -784,7 +784,7 @@ int32_t minmaxFunctionFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock) {
   pEntryInfo->isNullRes = (pEntryInfo->numOfRes == 0) ? 1 : 0;
 
   if (pCol->info.type == TSDB_DATA_TYPE_FLOAT) {
-    float v = *(float*)&pRes->v;
+    float v = GET_DOUBLE_VAL(&pRes->v);
     colDataAppend(pCol, currentRow, (const char*)&v, pEntryInfo->isNullRes);
   } else {
     colDataAppend(pCol, currentRow, (const char*)&pRes->v, pEntryInfo->isNullRes);
diff --git a/source/libs/function/src/detail/tminmax.c b/source/libs/function/src/detail/tminmax.c
index cb5cea3cc8..b919dc1123 100644
--- a/source/libs/function/src/detail/tminmax.c
+++ b/source/libs/function/src/detail/tminmax.c
@@ -737,6 +737,7 @@ int32_t doMinMaxHelper(SqlFunctionCtx* pCtx, int32_t isMinFunc) {
 
     if (!pBuf->assign) {
       pBuf->v = *(int64_t*)tval;
+
       if (pCtx->subsidiaries.num > 0) {
         index = findRowIndex(pInput->startRowIndex, pInput->numOfRows, pCol, tval);
         if (index >= 0) {
@@ -788,11 +789,11 @@ int32_t doMinMaxHelper(SqlFunctionCtx* pCtx, int32_t isMinFunc) {
         }
       } else if (type == TSDB_DATA_TYPE_FLOAT) {
         float prev = 0;
-        GET_TYPED_DATA(prev, float, type, &pBuf->v);
+        GET_TYPED_DATA(prev, float, TSDB_DATA_TYPE_DOUBLE, &pBuf->v);
 
         float val = GET_DOUBLE_VAL(tval);
         if ((prev < val) ^ isMinFunc) {
-          *(float*)&pBuf->v = val;
+          *(double*)&pBuf->v = GET_DOUBLE_VAL(tval);
         }
 
         if (pCtx->subsidiaries.num > 0) {
@@ -888,4 +889,4 @@ _over:
   }
 
   return numOfElems;
-}
\ No newline at end of file
+}