Java – hibernate 5: generator class = “sequence” does not work properly

• Java

I have the following mappings:

<id name="id" type="java.lang.Long" column="id">
        <generator class="sequence">
            <param name="sequence">tracksdata_seq</param>
        </generator>
    </id>

When I used it in Hibernate 4.2, everything went well Now I am migrating to hibernate 5 and facing the following problems:

2015-10-06 19:49:50 DEBUG sql:92 - select nextval ('hibernate_sequence')
2015-10-06 19:49:50 DEBUG sqlExceptionHelper:122 - Could not extract ResultSet [n/a]
org.postgresql.util.PsqlException: ERROR: relation "hibernate_sequence" does not exist

How to solve this problem?

Attachment: Hibernate 5.0 2.Final.

Solution

You have two choices:

>You will hibernate id.new_ generator_ Set the mappings configuration property to false and switch back to the old identifier generator > you can change the mapping as follows:

<generator class="sequence">
    <param name="sequence">MY_SEQUENCE</param>
</generator>

To:

<generator class="org.hibernate.id.enhanced.SequenceStyleGenerator">
    <param name="optimizer">none</param>
    <param name="increment_size">1</param>
    <param name="sequence_name">MY_SEQUENCE</param>
</generator>
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