Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.
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:query"); q.setParameter("query", "%myQuery%"); I don't get any error! The order of the WHERE clauses
of a corrupted ObjectDB database file Repairs a corrupted ObjectDB database file by creating a new ... - if the recovery file is disabled. Using the database file simultaneously by two instances of the ObjectDB ... . Modifying the database file externally not through ObjectDB (e.g. by malicious software such as
(SQL, JDBC, ORM or JPA) is not required in order to follow this guide, but a strong background ... on practical issues in order to make the reader proficient in a short time. After reading this guide you may want to extend your knowledge of JPA by reading a book on JPA.
Existing entity objects can be deleted from the database either explicitly by invoking the remove method or implicitly as a result of a cascade operation. Explicit Remove In order to delete an object ... back and not committed the object is not deleted. An IllegalArgumentException is thrown by remove
") specifies if SSL is used. As shown above, SSL is disabled by default. It could be enabled ... signature. This file is generated from the Keystore file by omitting the private key (it still contains ... machine as long as a valid username and password are provided. If authenticating the client machine by
to the order of the where clouse and the 2.7.4 wasn't. Unfortunatly I was not able to strip ... to the order of the where clause, meaning that the result set differs. As far as I understand there might be some performence issues related to the order but no different result set. Because we have different
) is that in JPA data is represented by classes and objects rather than by tables and records as in JDBC ... programming. A JPA implementation (sometimes referred to as a JPA provider) is needed in order ... Persistence API (JPA). By interacting with ObjectDB using standard JPA you can keep your application
(and a criteria query) is explained by describing the main clauses of JPQL queries (SELECT, FROM, WHERE, GROUP BY, HAVING, ORDER BY): Then the expressions that are used for building JPQL and criteria query
( "SELECT g FROM Guest g ORDER BY g.id", Guest.class); return query ... Operations on the database will be performed by an instance of a Data Access Object (DAO) that we will define in this step as a Spring MVC component: Open the [New Java Class] dialog box by right
declarations separated by commas. Each ordering declaration is the name of the field on which to order ... with a PersistenceManager. Multiple queries might be executed simultaneously by different threads ... , import statements, ordering and grouping specifications, result and result class, the range