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Manual
9

Numbers in JPQL and Criteria Queries

- when the return value is numeric, e.g. INDEX, SIZE. as string functions - when the return value is numeric, e
Manual
9

ORDER BY clause (JPQL / Criteria API)

The ORDER BY clause specifies a required order for the query results. Any JPQL query that does not include an ORDER BY clause produces results in an undefined and non-deterministic order. ORDER BY Expressions The following query returns names of countries whose population size
Manual
9

Paths and Types in JPQL and Criteria API

as one group, and COUNT calculates its size). Criteria Query Paths and Types Paths and navigations
Manual
9

Setting and Tuning of JPA Queries

is used to specify the result window size. Any result after hitting that specified maximum is ignored
Result
9

What is new in ObjectDB 2.0?

ObjectDB 2.0 supports many new features and improvements, including: Most of the features of the new JPA 2.0 and JDO 2.2 APIs. User defined IDs (primary key) and sequences. Support of unlimited index keys size. SQL like queries ("select from ... where ..."). Real non blocking multithreading in
Manual
9

SELECT clause (JPQL / Criteria API)

, depending on the size of the query result list and other factors. SELECT in Criteria Queries The criteria
Issue
9

Best practise loading big data

caches Entity caches You may use the above links to the see default sizes of caches ... . the EntityManagerFactory). If you need an advice regarding tuning cache sizes to reduce RAM please provide ... the unused entities. When reading further, the cache size and the number of weak references still grows
JPA Doc
8

javax.persistence.criteria.CriteriaBuilder

Returns: simple case expression Since: JPA 2.0 Expression size(C collection) Create an expression that tests the size of a collection. Create an expression that tests the size of a collection. Parameters: collection - collection Returns: size expression Since: JPA 2.0 Expression
JDO Doc
5

getFetchSize()

Method javax.jdo.FetchPlan int getFetchSize() Return the fetch size, or FETCH_SIZE_OPTIMAL if not set, or FETCH_SIZE_GREEDY to fetch all. Returns: the fetch size Since: JDO 2.0
JDO Doc
5

setFetchSize(fetchSize)

Method javax.jdo.FetchPlan FetchPlan setFetchSize(   int fetchSize ) Set the fetch size for large result set support. Use FETCH_SIZE_OPTIMAL to unset, and FETCH_SIZE_GREEDY to force loading of everything. Parameters: fetchSize - the fetch size Returns: the FetchPlan Since: JDO 2.0