What is SQL to Android Room Entity Generator?
This tool converts SQL CREATE TABLE statements to Kotlin Android Room Entity classes. Room is Android's recommended persistence library, providing an abstraction layer over SQLite with compile-time SQL verification, convenient annotations for database operations, and seamless integration with LiveData and Flow for reactive data observation.
How to Use
- Paste your SQL CREATE TABLE statements
- Select your database dialect (PostgreSQL, MySQL, or SQLite)
- Configure generation options (@Entity annotation, @Dao interface, TypeConverters)
- Click "Generate" and copy the Room Entity Kotlin code
Why Use This Tool?
Tips & Best Practices
- Room requires @PrimaryKey on at least one column per entity
- Use TypeConverters for custom types like Date that Room cannot natively handle
- Nullable columns are automatically mapped to Kotlin nullable types (Type?)
- Add the Room dependency: implementation "androidx.room:room-runtime:2.6.1" and ksp "androidx.room:room-compiler:2.6.1"
Frequently Asked Questions
What is Android Room?
Android Room is a persistence library that provides an abstraction layer over SQLite. It consists of three major components: Database, Entity (representing tables), and DAO (Data Access Object for queries). Room provides compile-time SQL query verification and convenient annotations for database operations.
How are SQL types mapped to Kotlin types?
SQL types are mapped to Kotlin types suitable for Room. INTEGER maps to Int, BIGINT maps to Long, VARCHAR/TEXT map to String, BOOLEAN maps to Boolean, TIMESTAMP maps to Long (or Date with TypeConverters), DATE maps to Long, REAL/FLOAT maps to Float, DOUBLE maps to Double, BLOB maps to ByteArray, and nullable columns use Type? (nullable Kotlin types).
What annotations are generated?
The tool generates @Entity(tableName = "...") for the class, @PrimaryKey for primary key columns, @ColumnInfo(name = "...") for each field, and @ForeignKey annotations for referenced tables. Optional @Dao interface with @Query, @Insert, @Update, @Delete methods can also be generated.
How are foreign keys handled?
Foreign key references in SQL are converted to Room @ForeignKey annotations in the @Entity declaration. The tool generates the foreignKeys parameter with parent entity class, parent columns, and child columns properly mapped.
Is my SQL data sent to a server?
No, all processing happens entirely in your browser. Your SQL schema never leaves your device. The conversion is performed client-side using a regex-based parser.