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6

Calculating age in query?

? thanks! Alex quasado Alexander Adam You can use a JPQL query with a simple date comparison: SELECT p
6

Multi-Threading/Distributed-Database Questions...

Greetings ObjectDB team, All below questions assume a very large database (~1,000,000,000 objects): Q1: In what cases would ObjectDB utilize multi-threading ? how about in JOIN operations ? Q2: Is it true that two read-only JPQL queries accessing the same database file actually run simultaneously
6

Reporting Engine?

New to java and objectdb - I am looking for a reporting engine to use with objectdb. Would birt work or is there something better matched? I am ideally looking for something template based with external template designer to customize the template. kevine Kevin Elbury Basic support of JPQL / EJB QL
6

Object comparation never matches

/jpa/query/jpql/comparison Section "Comparable Data Types" Comparison is supported for values
6

Navigation through Path to evaluate collection

this (not valid JPQL but may be supported by ObjectDB): SELECT item FROM ProductData item WHERE item
6

Spatial queries with ObjectDB

queries to provide your own spatial extension to JPQL. Obviously this is not a complete solution but it could be considered for minor spatial needs. support Support
6

Is named-query supported in orm.xml

I prefer to keep custom JPQL named queries in an external file, e.g. orm.xml, rather than in the entity classes, for example: <named-query name= "DataValue.deleteByCapabilityAndCreationtime"> <query>delete from DataValue d where d.capabilityId = :capabilityId
6

Criteria query error: Unexpected query token

is expected) A query with no SELECT may be valid in Hibernate HQL but not in JPQL and JPA Criteria
6

Handling "is null" in where clause

Greetings, I was playing aroung with JPQL and have found that there is a problem with "is null" queries. When you use "is null" in where clause, query runs correctly, but results are incorrect. Let me show you an example: - entity @Entity public class EntityA {     @Id     Integer id
1

Update query bug

.Main.main(Main.java:22) Martynas Martynas This UPDATE query is invalid because JPQL UPDATE queries

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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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