load-group

Use eclipselink.load-group to configures a query to use the load group object.

Values

Table 4-23 describes this persistence property's values.

Table 4-23 Valid Values for load-group

Value	Description
	An instance of `LoadGroup`

Usage

With load groups, EclipseLink ensures that all relational attributes for a group are loaded. LoadGroups are only supported for queries returning objects (only a single alias can be the select clause).

Examples

Example 4-46 Using load-group in a JPA Query

import org.eclipse.persistence.config.HintValues;
 import org.eclipse.persistence.config.QueryHints;
 query.setHint("eclipselink.LOAD_GROUP", lg);

Example 4-47 Using load-group in a @QueryHint Annotation

import org.eclipse.persistence.config.HintValues;
 import org.eclipse.persistence.config.QueryHints;
 @QueryHint(name=QueryHints.LOAD_GROUP, value="lg");

See Also

For more information, see:

"load-group.attribute"
"AttributeGroup Types and Operations" in Understanding EclipseLink
EclipseLink Attribute Group example:
http://wiki.eclipse.org/EclipseLink/Examples/JPA/AttributeGroup