#utf8mb4
Build APM on Windows, Part 4: Compile MariaDB 11.8 LTS
Part 4 of the Build APM on Windows series walks through compiling MariaDB 11.8.9 from source with CMake and Ninja, from preparing the tools and running the script to testing on port 3399 and explaining why collation must be pinned to utf8mb4_unicode_ci
Charset Mismatch Silently Kills JOIN Indexes — an utf8mb4 Mirror
The old database uses tis620 and the new one uses utf8mb4. JOIN across databases, and every index immediately becomes decorative without a single error — how to prove it with EXPLAIN and build a mirror that converts tis620 to utf8mb4 during the dump, plus the sed trap that silently breaks tables.
Thai Data Migration Traps: VARCHAR, Idempotency, and OCR Vowels
Lessons from importing and migrating hundreds of thousands of Thai data rows — undersized VARCHAR columns silently truncating synthetic keys into collisions, idempotency requiring DELETE before INSERT to stop totals reaching 200%, collation treating su001 and SU001 as equal while storing both, and Thai vowels corrupted by OCR that need a normalization map before insert