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goose
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database/store_extended.go
33 строки
1 KB
Michael Fridman
feat: postgres migration table existence check (#860)
24 ноя 2024, 04:31
Не верифицирован
24 ноя 2024, 04:31
48c4946
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package database import "context" // StoreExtender is an extension of the Store interface that provides optional optimizations and // database-specific features. While not required by the core goose package, implementing these // methods can improve performance and functionality for specific databases. // // IMPORTANT: This interface may be expanded in future versions. Implementors MUST be prepared to // update their implementations when new methods are added, either by implementing the new // functionality or returning [errors.ErrUnsupported]. // // The goose package handles these extended capabilities through a [controller.StoreController], // which automatically uses optimized methods when available while falling back to default behavior // when they're not implemented. // // Example usage to verify implementation: // // var _ StoreExtender = (*CustomStoreExtended)(nil) // // In short, it's exported to allows implementors to have a compile-time check that they are // implementing the interface correctly. type StoreExtender interface { Store // TableExists checks if the migrations table exists in the database. Implementing this method // allows goose to optimize table existence checks by using database-specific system catalogs // (e.g., pg_tables for PostgreSQL, sqlite_master for SQLite) instead of generic SQL queries. // // Return [errors.ErrUnsupported] if the database does not provide an efficient way to check // table existence. TableExists(ctx context.Context, db DBTxConn) (bool, error) }