HarmonyOS developers often face tough choices when adopting relationalStore for local data persistence. This case study from a real project reveals five key decisions: choosing between relationalStore and KVStore, designing efficient schemas for complex queries, handling concurrent transactions safely, optimizing read performance with indexes, and managing data migration across app updates. Each decision is backed by concrete trade-offs and outcomes. For teams building data-intensive HarmonyOS apps, these insights can save weeks of trial and error. The article emphasizes that relationalStore is not a drop-in replacement for SQLite but offers tighter integration with HarmonyOS lifecycle and security models. Developers should evaluate their query patterns and data relationships before committing to a storage strategy.
A practical guide to five critical decisions when implementing HarmonyOS relationalStore in a production app, covering schema design, transactions, and performance.