Merge pull request #4751 from taosdata/hotfix/TD-2583

[TD-2583]<fix>:function min gets result value zero when column values contain NULL
taosdata · Dec 31, 2020 · cbdabcd · cbdabcd
2 parents 2a53414 + ee602ff
commit cbdabcd
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/client/src/tscFunctionImpl.c b/src/client/src/tscFunctionImpl.c
@@ -921,6 +921,10 @@ static void minMax_function(SQLFunctionCtx *pCtx, char *pOutput, int32_t isMin,
     *notNullElems = pCtx->size - pCtx->preAggVals.statis.numOfNull;
     assert(*notNullElems >= 0);
 
+    if (*notNullElems == 0){
+      return;
+    }
+
     void *  tval = NULL;
     int16_t index = 0;