How to use MySQL's full text search from JPA

Question

I want to use MySQL\'s full text search features using JPA, without having to use a native query.

I am using EclipseLink, which has a function to support native SQL

Answer 1

An improved answer of @Markus Barthlen which works for Hibernate.

Create custom dialect

public class MySQLDialectCustom extends MySQL5Dialect {
  public MySQLDialect() {
    super();
    registerFunction("match", new SQLFunctionTemplate(StandardBasicTypes.DOUBLE,
        "match(?1) against  (?2 in boolean mode)"));
  }
}

and register it by setting hibernate.dialect property.

Use it

in JPQL:

Query query = entityManager
    .createQuery("select an from Animal an " +
             "where an.type = :animalTypeNo " +
             "and match(an.name, :animalName) > 0", Animal.class)
    .setParameter("animalType", "Mammal")
    .setParameter("animalName", "Tiger");
List result = query.getResultList();
return result;

or with Criteria API:

CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
CriteriaQuery criteriaQuery = criteriaBuilder.createQuery(Animal.class);
Root root = criteriaQuery.from(Animal.class);

List predicates = new ArrayList<>();

Expression match = criteriaBuilder.function("match", Double.class, root.get("name"),
criteriaBuilder.parameter(String.class, "animalName"));

predicates.add(criteriaBuilder.equal(root.get("animalType"), "Mammal"));
predicates.add(criteriaBuilder.greaterThan(match, 0.));

criteriaQuery.where(predicates.toArray(new Predicate[]{}));

TypedQuery query = entityManager.createQuery(criteriaQuery);
List result = query.setParameter("animalName", "Tiger").getResultList();

return result;

Some more details in this blog post: http://pavelmakhov.com/2016/09/jpa-custom-function