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OLake Go (v0.4.0 - v0.4.2)

February 21, 2026 – March 5, 2026

What's New​

Sources​

  1. Column selection -
    Added column-level selection for streams to allow users to select specific columns to sync, with a sync_new_columns parameter to control whether newly added source columns are auto-included.

Bug Fixes & Stability​

  1. MySQL UNSIGNED integer overflow fix -
    Fixed CDC values for large MySQL UNSIGNED columns by reinterpreting signed integers from the binlog parser as the correct unsigned type before processing, preventing overflow/negative outputs.

  2. Chunk-scan query performance improvement -
    Replaced tuple-based range predicates with explicit lexicographic predicates and moved the logic into a shared builder, improving MySQL chunk-scan plans and performance. ​

  3. MSSQL uniqueidentifier chunk + CDC capture-instance stability -
    Normalized uniqueidentifier (GUID) byte values for consistent chunk split/scan boundaries, and added optional manage_capture_instances to manage CDC capture instances during schema evolution.