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https://issues.apache.org/jira/browse/MRQL-96?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Leonidas Fegaras closed MRQL-96.
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Resolution: Fixed
> Develop a MRQL debugger
> -----------------------
>
> Key: MRQL-96
> URL: https://issues.apache.org/jira/browse/MRQL-96
> Project: MRQL
> Issue Type: New Feature
> Components: Evaluation, Query Translation
> Affects Versions: 0.9.8
> Reporter: Leonidas Fegaras
> Assignee: Leonidas Fegaras
> Priority: Minor
>
> This patch introduces a novel query debugger based on the how-provenance
> information provided by the Provenance component addressed in MRQL-93. The
> debugger is a GUI based on JTree that allows to navigate through the
> provenance data associated with the query results in both forward and
> backward directions. The command to debug an MRQL query e is {{debug e}} for
> coarse-grain debugging or {{debug all e}} for fine-grain debugging. The GUI
> allows you to filter out the output or the input data to reduce the amount of
> information on screen.
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