From a012f6fe708945dfcd6712a6b890dd79a563ef92 Mon Sep 17 00:00:00 2001
From: Aliaksandr Valialkin <valyala@gmail.com>
Date: Sat, 4 Apr 2020 14:44:40 +0300
Subject: [PATCH] app/vmselect/promql: keep metric name after applying
 `first_over_time` and `last_over_time` functions

---
 app/vmselect/promql/rollup.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/app/vmselect/promql/rollup.go b/app/vmselect/promql/rollup.go
index 977c7ec95d..6820873e91 100644
--- a/app/vmselect/promql/rollup.go
+++ b/app/vmselect/promql/rollup.go
@@ -153,6 +153,8 @@ var rollupFuncsKeepMetricGroup = map[string]bool{
 	"geomean_over_time":     true,
 	"hoeffding_bound_lower": true,
 	"hoeffding_bound_upper": true,
+	"first_over_time":       true,
+	"last_over_time":        true,
 }
 
 func getRollupAggrFuncNames(expr metricsql.Expr) ([]string, error) {