query-results-cache.ignore-null

Use eclipselink.query-results-cache.ignore-null to specify if EclipseLink caches null query results

Values

Table 4-30 describes this query hint's values.

Table 4-30 Valid Values for query-results-cache.ignore-null

Value	Description
`true`	Ignore null results (that is, do not cache results)
`false`	(Default) Do not ignore `null` results (that is, do cache results)

Usage

You can use this query hint to use query cache as a secondary key index, and allow inserts of new objects.

Examples

Example 4-61 Using query-results-cache.ignore-null in a JPA Query

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

Example 4-62 Using query-results-cache.ignore-null in a @QueryHint Annotation

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

See Also

For more information, see:

"query-results-cache"