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@ -253,10 +253,10 @@ namespace CncCollector.Core
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conn.Execute(@"UPDATE cnc_machine SET last_ping_time = NOW(), last_ping_latency = @Latency, updated_at = NOW() WHERE id = @Id",
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new { Id = kv.Key, Latency = kv.Value });
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}
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// 离线机床：清空延迟，不更新 last_ping_time
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// 离线机床：不更新 last_ping_time，保留上次延迟值
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if (offlineIds.Count > 0)
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{
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conn.Execute(@"UPDATE cnc_machine SET last_ping_latency = NULL, updated_at = NOW() WHERE id IN @Ids",
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conn.Execute(@"UPDATE cnc_machine SET updated_at = NOW() WHERE id IN @Ids",
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new { Ids = offlineIds });
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}
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}
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