exists method
Check if any rows exists using the built statement
Implementation
Future<bool> exists() async {
final BaseSelectStatement statement = buildSelectStatement();
final query = existsQuery(statement);
final existsStatement = db.selectOnly(_tableAsTableInfo)
..addColumns([query]);
return (await existsStatement
.map((p0) => p0.read(query))
.get()
.then((value) {
return value.firstOrNull ?? false;
}));
}