174 words
getSingleResult() - JPA TypedQuery's method
Methodjavax.persistence.TypedQuery
X getSingleResult()
Execute a SELECT query that returns a single result.
- Returns:
- the result
- Throws:
NoResultException- if there is no resultNonUniqueResultException- if more than one resultIllegalStateException- if called for a Java Persistence query language UPDATE or DELETE statementQueryTimeoutException- if the query execution exceeds the query timeout value set and only the statement is rolled backTransactionRequiredException- if a lock mode has been set and there is no transactionPessimisticLockException- if pessimistic locking fails and the transaction is rolled backLockTimeoutException- if pessimistic locking fails and only the statement is rolled backPersistenceException- if the query execution exceeds the query timeout value set and the transaction is rolled back
- Since:
- JPA 2.0
This documentation page is derived (with some adjustments) from the open source JPA 2 RI (EclipseLink)
and is available under the terms of the Eclipse Public License, v. 1.0 and Eclipse Distribution License, v. 1.0.
and is available under the terms of the Eclipse Public License, v. 1.0 and Eclipse Distribution License, v. 1.0.
Object Relational Mapping (ORM) JPA 2 providers include Hibernate, EclipseLink, TopLink, OpenJPA and DataNucleus.
Object DB is not an ORM JPA implementation but an Object Database for Java with built in JPA 2 support.
Which JPA is Faster?
See a comparison of Hibernate, EclipseLink, OpenJPA, DataNucleus, MySQL, PostgreSQL, Derby, HSQLDB, DB4O by Versant, H2 Database, SQLite and ObjectDB
in the JPA Benchmark.
