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https://issues.apache.org/jira/browse/DRILL-19?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13561597#comment-13561597
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Ted Dunning commented on DRILL-19:
----------------------------------
Type unions are normally done in protobuf using multiple optional fields,
possibly with a (redundant) type indicator field. This has more generality
than desired, but it serves the purpose. Having a repeated field with these
optional fields would handle the list case.
> Build a JSON scanner that does schema discovery
> -----------------------------------------------
>
> Key: DRILL-19
> URL: https://issues.apache.org/jira/browse/DRILL-19
> Project: Apache Drill
> Issue Type: New Feature
> Reporter: Jacques Nadeau
> Assignee: Timothy Chen
> Attachments: scan-json.patch
>
>
> Build a JSON scanner that reads a file and converts it into two parts: a
> stream of records and a schema which reflects the schema of the records.
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