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  1. OpenJPA
  2. OPENJPA-281

EAGER not the default fetch type without the @Basic annotation



    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • 0.9.7
    • 1.0.0
    • jpa
    • None


      There's an on-going discussion on the dev mailing list concerning this problem (http://www.nabble.com/Eager-fetching-not-working-with-enums-and-lobs-tf4037105.html). Since I've gotten agreement on at least one aspect of the problem, I decided to open this JIRA Issue to document the problem.

      Here's a summary of the problem:

      I am finding that the supposed default action of Eager fetching is not happening with @Enumerated and @Lob fields. If I explicitly specify the @Basic annotation, then the fields are eagerly fetched. But, without this extraneous @Basic, these fields are lazily loaded. This action does not seem to be consistent with the spec. Nor, can I find any mention of this alternate behavior in our OpenJPA manual. Sounds like a bug to me. Any other insights?

      This works (eager loading kicks in):

      @Basic @Enumerated(EnumType.STRING)
      private Gender gender;

      This does not work (lazy loading kicks in):

      private Gender gender;

      I have also tried to use defaults (without any annotations), and lazy loading still kicks in:

      private Gender gender;

      The JPA spec attempts to address this situation in section 9.1.18... Section 9.1.8 of the JPA spec indicates that @Basic is optional and applies to the following types:

      "..Java primitive types, wrappers of the primitive types, java.lang.String, java.math.BigInteger,
      java.math.BigDecimal, java.util.Date, java.util.Calendar, java.sql.Date,
      java.sql.Time, java.sql.Timestamp, byte[], Byte[], char[], Character[],
      enums, and any other type that implements Serializable."

      And, since the default fetch type for @Basic is EAGER, it looks like we need to do eager fetching for both @Enumerated and @Lob fields unless otherwise overridden by a LAZY fetch type (ie. @Basic(fetch=LAZY)). Agree?

      We're still working on the agreement...



        1. openjpa-281.patch
          15 kB
          Kevin W. Sutter



            kwsutter Kevin W. Sutter
            kwsutter Kevin W. Sutter
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