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

Just to complete the answer: I had the same problem, but using the criteria builder. This is how you can get around the limitations in the standart implementation, if you are using EclipseLink:

1. Cast JPA expression to EclipseLink expression
2. Use the sql method
3. If you match against a compound index, create it using the function method

Example:

    JpaCriteriaBuilder cb = (JpaCriteriaBuilder) cb;

    List args = new ArrayList();
    args.add("Keyword");

    Expression expr = cb.fromExpression (
      cb.toExpression(
         cb.function("", String.class,
           table.get(Table_.text1), table.get(Table_.text2)) 
      )                          
       .sql("MATCH ? AGAINST (?)", args)
     );

    query.where(expr);

If you need to cast the expression to a predicate use the following:

query.where( cb.gt(expr, 0));