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https://issues.apache.org/jira/browse/DRILL-5324?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paul Rogers updated DRILL-5324:
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Labels: ready-to-commit (was: )
> Provide simplified column reader/writer for use in tests
> --------------------------------------------------------
>
> Key: DRILL-5324
> URL: https://issues.apache.org/jira/browse/DRILL-5324
> Project: Apache Drill
> Issue Type: Sub-task
> Components: Tools, Build & Test
> Affects Versions: 1.11.0
> Reporter: Paul Rogers
> Assignee: Paul Rogers
> Labels: ready-to-commit
> Fix For: 1.11.0
>
>
> In support of DRILL-5323, we wish to provide a very easy way to work with row
> sets. See the comment section for examples of the target API.
> Drill provides over 100 different value vectors, any of which may be required
> to perform a specific unit test. Creating these vectors, populating them, and
> retrieving values, is very tedious. The work is so complex that it acts to
> discourage developers from writing such tests.
> To simplify the task, we wish to provide a simplified row set reader and
> writer. To do that, we need to generate the corresponding column reader and
> writer for each value vector. This ticket focuses on the column-level readers
> and writers, and the required code generation.
> Drill already provides vector readers and writers derived from
> {{FieldReader}}. However, these readers do not provide a uniform get/set
> interface that is type independent on the application side. Instead,
> application code must be aware of the type of the vector, something we seek
> to avoid for test code.
> The reader and writer classes are designed to be used in many contexts, not
> just for testing. As a result, their implementation makes no assumptions
> about the broader row reader and writer, other than that a row index and the
> required value vector are both available.
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