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Unexpected query token 'delete' (SELECT is expected) (error 752)

simple codes(see attachment), failed. gzdillon Lai Yang DELETE queries should not be run with getSingleResult (which is for SELECT queries). Use executeUpdate instead. See this manual page. support Support

How to delete M2M relationship?

.ALL)     private Set timeslots = new HashSet(); And i would like to delete the timeslots..i've tried

cannot delete objects after crash (see issue 2283)

after the crash we cannot delete specific objects, see screenshots of explorer. Database will be soon available (size 5.561.119 KB) on hummingbird-systems.com, user/pw your db name, main menu option objectdb hgzwicker Hans-Georg Zwicker meanwhile the database became completely unusable

delete of a collection in explorer changes type

accidently we used the option delete on a collection of type ArrayList<ObjectNode>. On doing so the type changed to List<ObjectNode>. we are using explorer version 2.7.1_02 How can we change that back again ? hgzwicker Hans-Georg Zwicker Is it only an issue with the type of the field as shown by

Working with JPA Entity Objects

requires using entity objects for many operations, including storing, retrieving, updating and deleting ... . A managed entity object can also be retrieved from the database and marked for deletion, using ... to Removed, and is physically deleted from the database during commit. More details on object

JPA Query Structure (JPQL / Criteria)

(update and delete queries have a slightly different form). The other JPQL clauses, WHERE, GROUP BY, HAVING and ORDER BY are optional. The structure of JPQL DELETE and UPDATE queries is simpler: DELETE

Database Management Settings

="128mb" /> When enabled, a recovery file is created by ObjectDB when a database is opened and deleted ... (usually in tests). The content of these temporary databases is deleted when using the drop URL

SELECT clause (JPQL / Criteria API)

objects, transparent update detection, support for delete, etc. Query results are not limited to entity ... efficiently. They are less productive with operations that update or delete entity objects, in

[ODB1] Chapter 3 - Persistent Classes

jdoPreDelete() Called during the execution of deletePersistent(...), just before an object is deleted. A possible action is to delete depended persistent objects as demonstrated ... .deletePersistent(p1); pm.deletePersistent(p2); } } When a Line instance is deleted

[ODB1] Chapter 5 - JDO Connections

storing, retrieving, updating and deleting database objects, are provided in the next chapter (Chapter ... , delete) must always be performed within an active transaction. On the other hand, reading from ... $. After the transaction is completed the temporary file is marked as obsolete (and for efficiency, it is deleted

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

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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