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11

CRUD Database Operations with JPA

) require an active transaction. In the example above, every Point object is first constructed as ... when exactly one result value is expected (a single Long object in the query above). Let's see another example ... ); // update entity } } em.getTransaction().commit(); In the above example all the Point
Result
11

Posting to ObjectDB Website - Important Instructions

. Avoid overflow of published source code examples by breaking long lines. Long stack traces (> 50 lines) and complex source examples (> 100 lines) should be posted as attachments. 3. Sample Code ... ). You may use the following example as an initial template for your test case: package test
Manual
9

Chapter 1 - Quick Tour

This chapter demonstrates basic ObjectDB and JPA concepts by introducing a simple example program. After reading this chapter you should be able to write basic programs that create, open and close ... ) on ObjectDB databases. The example program that this chapter presents manages a simple database
JPA Doc
9

Criteria Query From Elements

and its descendant interfaces: See the FROM in Criteria Queries section for more details and examples. Join Fetch Elements Join Fetch is managed in criteria queries by the following interfaces: See the FROM in Criteria Queries section for more details and an example.
Manual
9

Database Explorer

there is a log panel that displays the selected query execution plan. This is useful, for example ... ). For example, an entity object can be selected and copied as a reference into the clipboard (in any viewer
Manual
9

Database Server

, which is much more efficient. As a result, embedded mode should be preferred when possible. For example ... server commands). For example: > server.exe -client -Xmx256m -port 6666 Explicitly specified
Manual
9

Detached Entity Objects

address; : } In the example above, the Employee entity class contains an address field ... address; : } In the example above, the Employee entity class contains an address field
FAQ
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Is ObjectDB better than competing object databases?

supporting features that are usually available only in relational databases. For example, most object ... that an essential feature is missing. For example, some competing products do not support aggregate
Manual
9

JPA Criteria API Queries

may be preferred. For example, building a dynamic query based on fields that a user fills at runtime ... (both methods are equivalent). In the example above a CriteriaQuery instance is created for representing
Manual
9

JPA Entity Fields

provider (such as Hibernate) or to change default field settings. For example: @Entity public class ... (the Employee class in our example) is the owner. Only changes to the owner side affect the database