From ad08d9c88483a888d589aab1f301ff1fab270413 Mon Sep 17 00:00:00 2001
From: Aliaksandr Valialkin <valyala@victoriametrics.com>
Date: Mon, 24 Jul 2023 19:30:47 -0700
Subject: [PATCH] lib/promrelabel: return correct string representation for
 IfExpression containing a single selector

This is a follow-up for 62651570bb6142f94025266e9e65353f3d6c37e2

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4635
---
 lib/promrelabel/if_expression.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/promrelabel/if_expression.go b/lib/promrelabel/if_expression.go
index 6ae413efa1..78519d3e8a 100644
--- a/lib/promrelabel/if_expression.go
+++ b/lib/promrelabel/if_expression.go
@@ -141,7 +141,10 @@ func newIfExpression(s string) (*ifExpression, error) {
 // String returns string representation of ie.
 func (ie *IfExpression) String() string {
 	if ie == nil {
-		return "[]"
+		return "{}"
+	}
+	if len(ie.ies) == 1 {
+		return ie.ies[0].String()
 	}
 	return fmt.Sprintf("%s", ie.ies)
 }