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From "Pinaki Poddar (JIRA)" <>
Subject [jira] Created: (OPENJPA-1276) Support CQL for Criteria Query
Date Tue, 01 Sep 2009 18:04:33 GMT
Support CQL for Criteria Query

                 Key: OPENJPA-1276
             Project: OpenJPA
          Issue Type: New Feature
          Components: jpa, query, tooling
    Affects Versions: 2.0.0-M3, 2.0.0-M4, 2.0.0
            Reporter: Pinaki Poddar
            Assignee: Pinaki Poddar
             Fix For: 2.0.0-M3, 2.0.0-M4, 2.0.0

Support a mechanism to translate a Criteria Query instance into a String.

The string syntax should be *almost* JPQL but not exactly. Because some Criteria Query expressions
do not have a direct JPQL representation.
I will refer this almost JPQL-like syntax as Criteria Query Language or CQL -- which will
provide ample scope of confusion being homophonic with SQL.

>From a technical perspectives, conversion to a string format should address the following
1. the string should look more like JPQL than a mere translation of internal expressions (say
BETWEEN in two EQUAL nodes ANDed together internally)
2. the criteria query may be incomplete. This will be useful for the IDE tools to display
the string as an user constructs the query.

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