FullTextQuery hibQuery = fullTextSession.createFullTextQuery(query, MyBean.class);
  List<MyBean> tmp = hibQuery.list();

org.hibernate.exception.SQLGrammarException: could not execute query
   at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:67)
   at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
   at org.hibernate.loader.Loader.doList(Loader.java:2223)
   at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2104)
   at org.hibernate.loader.Loader.list(Loader.java:2099)
   at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94)
   at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1569)
   at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283)
   at org.hibernate.search.engine.QueryLoader.load(QueryLoader.java:79)
   at org.hibernate.search.query.FullTextQueryImpl.list(FullTextQueryImpl.java:244)
   at com.my.MyDAOImpl.fullTextSearch(MyDAOImpl.java:239)
   ... 166 more
Caused by: java.sql.SQLException: [SQL0104] Token ? was not valid. Valid tokens: (.
   at com.ibm.as400.access.JDError.throwSQLException(JDError.java:650)
   at com.ibm.as400.access.JDError.throwSQLException(JDError.java:621)
   at com.ibm.as400.access.AS400JDBCStatement.commonPrepare(AS400JDBCStatement.java:1557)
   at com.ibm.as400.access.AS400JDBCPreparedStatement.<init>(AS400JDBCPreparedStatement.java:193)
   at com.ibm.as400.access.AS400JDBCConnection.prepareStatement(AS400JDBCConnection.java:2025)
   at com.ibm.as400.access.AS400JDBCConnection.prepareStatement(AS400JDBCConnection.java:1824)
   at com.mchange.v2.c3p0.impl.NewProxyConnection.prepareStatement(NewProxyConnection.java:213)
   at org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:505)
   at org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:423)
   at org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:139)
   at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1547)
   at org.hibernate.loader.Loader.doQuery(Loader.java:673)
   at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)
   at org.hibernate.loader.Loader.doList(Loader.java:2220)
   ... 174 more

  FullTextQuery hibQuery = fullTextSession.createFullTextQuery(query);
  List<MyBean> tmp = hibQuery.list();

@Entity
@Table(name = "myTable")
@Indexed(index = "indexes/mybean")
public class MyBean implements Serializable {

    private MyBeanId myBeanId;

    // other fields

    @EmbeddedId
    @DocumentId
    @FieldBridge(impl = MyBeanIdFieldBridge.class)
    public MyBeanId getMyBeanId() {
        return myBeanId;
    }

    public void setMyBeanId(MyBeanId myBeanId) {
        this.myBeanId= myBeanId;
    }

    // other getters/setters
}

@SuppressWarnings("serial")
@Embeddable
public class MyBeanId implements Serializable, Comparable<MyBeanId> {

    private long id;
    private long secondId;

    @Field(index = Index.TOKENIZED, store = Store.NO)
    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public long getSecondId() {
        return secondId;
    }

    public void setSecondId(long secondId) {
        this.secondId= secondId;
    }

    @Override
    public String toString() {
        return "" + id;
    }

    @Override
    public boolean equals(Object in) {
        return EqualsBuilder.reflectionEquals(this, in);
    }

    @Override
    public int hashCode() {
        return HashCodeBuilder.reflectionHashCode(this);
    }

    public int compareTo(MyBeanId o) {
        return ((Long) id).compareTo(o.getId());
    }
}

select this_.id as id7_16_, this_.secondId as second2_7_16_, /*other stuff*/ from myTable this_ left outer join /*other stuff*/ where ((this_.id, this_.secondId) in ((?, ?), (?, ?), (?, ?), (?, ?), (?, ?), (?, ?), (?, ?), (?, ?), (?, ?), (?, ?), (?, ?), (?, ?), (?, ?), (?, ?), (?, ?), (?, ?), (?, ?), (?, ?), (?, ?)))