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Posted to dev@jena.apache.org by "Andy Seaborne (JIRA)" <ji...@apache.org> on 2017/04/26 10:40:04 UTC

[jira] [Updated] (JENA-1329) QueryIterRoot should not be overloaded for initial bindings.

     [ https://issues.apache.org/jira/browse/JENA-1329?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andy Seaborne updated JENA-1329:
--------------------------------
    Summary: QueryIterRoot should not be overloaded for initial bindings.  (was: QueryIterRoot)

> QueryIterRoot should not be overloaded for initial bindings.
> ------------------------------------------------------------
>
>                 Key: JENA-1329
>                 URL: https://issues.apache.org/jira/browse/JENA-1329
>             Project: Apache Jena
>          Issue Type: Improvement
>          Components: ARQ
>    Affects Versions: Jena 3.2.0, Jena 3.3.0
>            Reporter: Andy Seaborne
>            Assignee: Andy Seaborne
>
> {{QueryIterRoot}} is also used for initial bindings but the code sometimes assumes that the root binding is the join identity iterator (one row, no columns).
> {{QueryIterRoot}} should be reserved for for this case.
> {{QueryIterator}} could have a method {{.isJoinIdentity()}} so that an iterator can be tested without peeking and without assuming the java class.



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