class AddDefaultValueGeneratorDerby extends AddDefaultValueGenerator {
    @Override
    public int getPriority() {
        return PRIORITY_DATABASE;
    }

    @Override
    public boolean supports(AddDefaultValueStatement statement, Database database) {
        return database instanceof DerbyDatabase;
    }

    @Override
    public Sql[] generateSql(AddDefaultValueStatement statement, Database database, SqlGeneratorChain sqlGeneratorChain) {<FILL_FUNCTION_BODY>}
}

        Object defaultValue = statement.getDefaultValue();
        return new Sql[]{
                new UnparsedSql("ALTER TABLE " + database.escapeTableName(statement.getCatalogName(), statement.getSchemaName(), statement.getTableName()) + " ALTER COLUMN  " + database.escapeColumnName(statement.getCatalogName(), statement.getSchemaName(), statement.getTableName(), statement.getColumnName()) + " WITH DEFAULT " + DataTypeFactory.getInstance().fromObject(defaultValue, database).objectToSql(defaultValue, database),
                        getAffectedColumn(statement))
        };
    
<methods>public non-sealed void <init>() ,public liquibase.sql.Sql[] generateSql(liquibase.statement.core.AddDefaultValueStatement, liquibase.database.Database, SqlGeneratorChain#RAW) ,public liquibase.exception.ValidationErrors validate(liquibase.statement.core.AddDefaultValueStatement, liquibase.database.Database, SqlGeneratorChain#RAW) ,public liquibase.exception.Warnings warn(liquibase.statement.core.AddDefaultValueStatement, liquibase.database.Database, SqlGeneratorChain#RAW) <variables>