About getSingleResult
Running JPA Queries
Explains how to use JPA to run Java Persistence Query Language (JPQL) queries.... for running SELECT queries: Query.getSingleResult getSingleResult() Query's method Execute a SELECT query that ...
getSingleResult()
Execute a SELECT query that returns a single untyped result.(Method of javax.persistence.Query)
getSingleResult()
Execute a SELECT query that returns a single result.(Method of javax.persistence.TypedQuery)
Query Parameters in JPA
Explains how to use parameters (named parameters and ordinal parameters) in JPA queries.... Page... ( "name" , name ) . getSingleResult getSingleResult() TypedQuery's method Execute a SELECT query that ...
CRUD Database Operations with JPA
Shows how to use Java/JPA to store, retrieve, update & delete.... out . println ( "Total Points: " + q1. getSingleResult getSingleResult() Query's method Execute a SELECT query that ...
Setting and Tuning of JPA Queries
Explains various JPA query settings - result range, flush and lock.... typed List. See JavaDoc Reference Page... or getSingleResult getSingleResult() TypedQuery's method Execute a SELECT query that ...
javax.persistence.TypedQuery
Interface used to control the execution of typed queries.(Interface of JPA)
Online Backup
Online Backup enables backing up an ObjectDB database while it is in active use by applications. The ability to create a backup while the system is running is essential in applications and services that have to be available 24/7/365.... createQuery ( "objectdb backup" ) . getSingleResult ( ) ; The backup query string is ... \\ backup" ) ) ; backupQuery. getSingleResult ( ) ; The code above, for ...
Join performance in Objectdb
select count(e) from Meta e, ImageNet i, Page p where e.idImage=i.id and e.idPage=p.id; So simple a command cause me half an hour and is running now! Each table has about 160K records. What formula can predict the time for such counting? TIA ... , Long. class ) ; result = q1. getSingleResult ( ) ; elapsedTime = System. ... , Long. class ) ; result = q2. getSingleResult ( ) ; elapsedTime = System. ...
Possible issue with timestamps
Hi, If I query doing something like: select c from CDI c where c.creationDate > {ts '2012-03-29 11:00:00} and c.creationDate < {ts '2012-03-29 12:00:00'} the test fails. Its ONLY for 12:00:00. When I started digging I found that if I queried 00:00:00 to 00:25:00 and then did 12:00:00 to 12:25:00 I got IDENTICAL results. For some reason 12:00:00 is being treated the same as 00:00:00. All other hours seem to be fine. ... class ) ; Long cdiCount = query. getSingleResult ( ) ; assertEquals ( 22 , ... class ) ; cdiCount = query. getSingleResult ( ) ; assertEquals ( 3 , ...
