createTable method
Creates a new table if it doesn't exist (manual verification can be done by the caller beforehand).
ddlBody should contain the definition body, e.g., "(Id INT, Nome VARCHAR(100))"
Implementation
Future<Result<Unit>> createTable(String tableName, String ddlBody) async {
return (await driver.execute('CREATE TABLE $tableName $ddlBody')).map((_) => unit);
}