From eb8703fb4df028262ecde4d485d34c78389b9d1c Mon Sep 17 00:00:00 2001
From: trynocoding <71476293+trynocoding@users.noreply.github.com>
Date: Fri, 21 Mar 2025 15:24:41 +0800
Subject: [PATCH] fix(zset): preserve double precision during migration (#940)

This commit resolves the ZSET score truncation issue caused by using `%f` format specifier, which led to loss of precision for double values.
---
 internal/rdb/types/zset.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/internal/rdb/types/zset.go b/internal/rdb/types/zset.go
index f3604f5..97bbfcd 100644
--- a/internal/rdb/types/zset.go
+++ b/internal/rdb/types/zset.go
@@ -48,7 +48,7 @@ func (o *ZsetObject) readZset() {
 	for i := 0; i < size; i++ {
 		member := structure.ReadString(rd)
 		score := structure.ReadFloat(rd)
-		o.cmdC <- RedisCmd{"zadd", o.key, fmt.Sprintf("%f", score), member}
+		o.cmdC <- RedisCmd{"zadd", o.key, fmt.Sprintf("%.17g", score), member}
 	}
 }
 
@@ -58,7 +58,7 @@ func (o *ZsetObject) readZset2() {
 	for i := 0; i < size; i++ {
 		member := structure.ReadString(rd)
 		score := structure.ReadDouble(rd)
-		o.cmdC <- RedisCmd{"zadd", o.key, fmt.Sprintf("%f", score), member}
+		o.cmdC <- RedisCmd{"zadd", o.key, fmt.Sprintf("%.17g", score), member}
 	}
 }