How to Limit Query Results in JPQL/HQL?

JPQL/HQL Limit Queries

In Hibernate 3, you may encounter the need to perform a limit query, similar to MySQL's LIMIT clause. While the setMaxResults() method can be used, you seek an HQL alternative.

Historical Functionality

Older versions of Hibernate/HQL allowed for the use of the LIMIT clause within HQL queries. However, this feature was not officially supported and has been eliminated in subsequent versions.

Current Solution

The recommended approach for limit queries in JPQL or HQL is to use the Query.setMaxResults() method. This method sets the maximum number of results that will be returned by the query and effectively limits the number of records retrieved.

Consider the following HQL query using setMaxResults():

Query query = session.createQuery("from ATable order by aTableColumn desc");
query.setMaxResults(20);
List results = query.list();

This query retrieves a maximum of 20 rows from the ATable, ordering them in descending order by the aTableColumn field.

In summary, the use of the LIMIT clause in JPQL or HQL was never officially supported and has been removed in newer versions. The recommended alternative is to utilize the Query.setMaxResults() method for limiting the number of results returned by a query.

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