v0.20.3

English

BinlogViz v0.20.3 Release Notes

Release date: 2026-04-22

Changes

• Replace offset-based last-timestamp probing with sequential inference: The previous probeLastTimestamp function parsed from the last 256KB of each binlog file to find LastEventAt. On large files the offset lands mid-event, causing parse errors that leave LastEventAt zero — making the probing useless for the files that need it most. The new approach probes only FirstEventAt per file (reliable, starts from offset 0) and then infers LastEventAt[N] from FirstEventAt[N+1]. Since binlog files are written sequentially with monotonically increasing timestamps, this inference is always reliable. The last file in a sequence keeps zero LastEventAt (conservative inclusion by the planner). The fallback full-parse path remains unchanged and still sets exact LastEventAt.

Bug Fixes

None.

Breaking Changes

None.

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中文

BinlogViz v0.20.3 发布说明

发布日期：2026-04-22

变更

• 用顺序推断替换基于 offset 的末尾时间戳探测：之前的 probeLastTimestamp 函数从每个 binlog 文件末尾 256KB 处解析以获取 LastEventAt。在大文件上，偏移量落在事件中间会导致解析错误，LastEventAt 留零——在最需要过滤的场景下反而无效。新方法只探测每个文件的 FirstEventAt（从 offset 0 开始，可靠），然后从 FirstEventAt[N+1] 推断 LastEventAt[N]。由于 binlog 文件按序写入且时间戳单调递增，这个推断始终可靠。序列中最后一个文件的 LastEventAt 保持为零（planner 保守包含）。全量解析的 fallback 路径不变，仍然设置精确的 LastEventAt。

Bug 修复

无。

破坏性变更

无。