EmptyResultSetException

public final class EmptyResultSetException extends 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.

Inherited methods

From java.lang.Throwable
synchronized final void
synchronized Throwable
synchronized Throwable
String
String
StackTraceElement[]
synchronized final Throwable[]
synchronized Throwable
void
void
setStackTrace(StackTraceElement[] stackTrace)
String

Public constructors

EmptyResultSetException

Added in 2.3.0
public EmptyResultSetException(@NonNull String message)

Constructs a new EmptyResultSetException with the exception.

Parameters
@NonNull String message

The SQL query which didn't return any results.