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chrislu
6aba7e6620
- Design comprehensive SQL schema for offset storage with future _index column support - Implement SQLOffsetStorage with full database operations: - Partition offset checkpoints with UPSERT functionality - Detailed offset mappings with range queries and statistics - Database migration system with version tracking - Performance optimizations with proper indexing - Add database migration manager with automatic schema updates - Create comprehensive test suite with 11 test cases covering: - Schema initialization and table creation - Checkpoint save/load operations with error handling - Offset mapping storage and retrieval with sorting - Range queries and highest offset detection - Partition statistics with NULL value handling - Cleanup operations for old data retention - Concurrent access safety and database vacuum - Extend BrokerOffsetManager with SQL storage integration: - NewBrokerOffsetManagerWithSQL for database-backed storage - Configurable storage backends (in-memory fallback, SQL preferred) - Database connection management and error handling - Add SQLite driver dependency and configure for optimal performance - Support for future database types (PostgreSQL, MySQL) with abstraction layer Key TODOs and Assumptions: - TODO: Add _index as computed column when database supports it - TODO: Implement database backup and restore functionality - TODO: Add configuration for database path and connection parameters - ASSUMPTION: Using SQLite for now, extensible to other databases - ASSUMPTION: WAL mode and performance pragmas for production use - ASSUMPTION: Migration system handles schema evolution gracefully All 11 SQL storage tests pass, providing robust persistent offset management.