OLake (v0.3.14 - v0.3.15)

January 13, 2026 – January 20, 2026

🎯 What's New

Sources

1. New Source Introduction -
   Introduced MSSQL as new source connector for OLake.

2. New Source Introduction -
   Introduced DB2 LUW as new source connector for OLake.

Platform Features

1. OLake full refresh sync performance -
   Improved OLake sync performance for full refresh operations.

Destinations

1. Dedup handled by Iceberg Java engine -
   Removed Go-side de-duplication logic since the Iceberg Java writer already handles row-level changes via positional delete files.

🔧 Bug Fixes & Stability

1. Dynamic RPS benchmarking -
   Improved performance tests to compare requests-per-second (RPS) against the average of the last 5 runs instead of static benchmarks for more reliable performance tracking.

2. Parquet schema field name normalization -
   Normalized schema field names to lowercase before Parquet schema creation so mixed-case definitions like COL_INTEGER and col_integer map deterministically to a single destination column, preventing non-deterministic type overrides and intermittent Parquet write failures during schema evolution.

3. compare.go unit test coverage -
   Added unit tests for olake/utils/typeutils/compare.go, covering comparisons across nil, signed/unsigned integers, floats, booleans, time.Time, custom time types, and fallback string comparisons to harden core comparison logic used in incremental sync, backfill, and binlog processing.

4. MongoDB connection extra parameters -
   Allowed passing arbitrary key–value connection options via the MongoDB config so they are appended to the MongoDB URI as additional parameters.