EmptyResultSetException

class EmptyResultSetException : RuntimeException


Thrown by Room when the query in a Single DAO method needs to return a result but the returned result from the database is empty.

Since a Single must either emit a single non-null value or an error, this exception is thrown instead of emitting a null value when the query resulted empty. If the Single contains a type argument of a collection (e.g. Single>) then this exception is not thrown an an empty collection is emitted instead.

Summary

Public constructors

Constructs a new EmptyResultSetException with the exception.

Public constructors

EmptyResultSetException

Added in 2.3.0
EmptyResultSetException(message: String)

Constructs a new EmptyResultSetException with the exception.

Parameters
message: String

The SQL query which didn't return any results.