 15 | ). GROUP BY (including HAVING and aggregates). ORDER BY (including ASC, DESC). Aggregates (COUNT, SUM ... Databases are also supported by ObjectDB. The combination of Object Database features ... . Up to 9,223,372,036,854,775,808 entity objects per database file. Unlimited database connections (limited only by |
15 | ...]]
[ORDER BY ...]
The first two clauses, SELECT and FROM are required in every retrieval query ... , HAVING and ORDER BY are optional. The structure of JPQL DELETE and UPDATE queries is simpler:
DELETE ... GROUP BY / HAVING (groupBy, having, count, sum, avg, min, max, ...). Criteria ORDER BY (orderBy, Order, asc, desc). |
15 | ) The following method retrieves a Country object from the database by its name:
public Country ... method. The setParameter method supports method chaining (by returning the same TypedQuery instance ... . Named parameters can be easily identified in a query string by their special form, which is a colon |
15 | ) The following method retrieves a Country object from the database by its name:
public Country ... method. The setParameter method supports method chaining (by returning the same TypedQuery instance ... . Named parameters can be easily identified in a query string by their special form, which is a colon |
14 | update collisions resulting from simultaneous updates to the same data by two concurrent users. Locking ... by another transaction. When using ObjectDB, optimistic locking is enabled by default and fully ... is automatically increased by one. Version numbers are managed internally but can be exposed by defining a version |
14 | update collisions resulting from simultaneous updates to the same data by two concurrent users. Locking ... by another transaction. When using ObjectDB, optimistic locking is enabled by default and fully ... is automatically increased by one. Version numbers are managed internally but can be exposed by defining a version |
14 | As demonstrated in this forum thread, a mapped by collection field with lazy fetch mode is not initialized in results of a query that uses JOIN FETCH on that collection field (when enhancement is used). Build 2.4.1_06 fixes this issue (fields are now initialized and the test in the forum passes |
14 | ) The following method retrieves a Country object from the database by its name:
public Country ... method. The setParameter method supports method chaining (by returning the same TypedQuery instance ... . Named parameters can be easily identified in a query string by their special form, which is a colon |
14 | and served by ObjectDB Software Ltd and governs the privacy of its users who choose to use it. The policy ... by Google Analytics which uses cookies to track visitor usage. The software will save a cookie to your computers hard drive in order to track and monitor your engagement and usage of the website |
14 | ObjectDB Enhancer is a post compilation tool that improves performance by modifying the byte code ... (and actually required by JPA but not enforced by ObjectDB) to avoid accessing persistent fields ... . by using the get and set methods). If you follow this practice only user defined persistable |