opt selectivity function

source/libs/executor/src/executil.c

@@ -1486,7 +1486,7 @@ static int32_t setSelectValueColumnInfo(SqlFunctionCtx* pCtx, int32_t numOfOutpu
 
   for (int32_t i = 0; i < numOfOutput; ++i) {
     const char* pName = pCtx[i].pExpr->pExpr->_function.functionName;
-    if ((strcmp(pName, "_select_value") == 0) || (strcmp(pName, "_group_key") == 0)) {
+    if (strcmp(pName, "_select_value") == 0) {
       pValCtx[num++] = &pCtx[i];
     } else if (fmIsSelectFunc(pCtx[i].functionId)) {
       p = &pCtx[i];