From 2ef8706c275bf06dcf482605abcd4def9e2d3af5 Mon Sep 17 00:00:00 2001
From: Giuliano Panzironi <45801466+giulianopz@users.noreply.github.com>
Date: Mon, 3 Mar 2025 10:03:45 +0100
Subject: [PATCH] fix: format float to avoid overflow (#16083)

Signed-off-by: giulianopz <panzironi.giuliano@gmail.com>
---
 promql/parser/printer.go      | 2 +-
 promql/parser/printer_test.go | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/promql/parser/printer.go b/promql/parser/printer.go
index afe755e7dd..6f234a0290 100644
--- a/promql/parser/printer.go
+++ b/promql/parser/printer.go
@@ -232,7 +232,7 @@ func (node *SubqueryExpr) getSubqueryTimeSuffix() string {
 }
 
 func (node *NumberLiteral) String() string {
-	return fmt.Sprint(node.Val)
+	return strconv.FormatFloat(node.Val, 'f', -1, 64)
 }
 
 func (node *ParenExpr) String() string {
diff --git a/promql/parser/printer_test.go b/promql/parser/printer_test.go
index 0a557ad597..ce06d6ec4b 100644
--- a/promql/parser/printer_test.go
+++ b/promql/parser/printer_test.go
@@ -164,6 +164,10 @@ func TestExprString(t *testing.T) {
 			in:  "{``=\"0\"}",
 			out: `{""="0"}`,
 		},
+		{
+			in:  "1048576",
+			out: "1048576",
+		},
 	}
 
 	model.NameValidationScheme = model.UTF8Validation