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https://issues.apache.org/jira/browse/CALCITE-471?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14221154#comment-14221154
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Julian Hyde commented on CALCITE-471:
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The new file adapter should make access (e.g. regular file system, zipped
files, jars, HDFS, HTTP) and format (csv, json) orthogonal. A table or schema
specification should include a URL (where to find the file) and a format
adapter (something like a serde).
> Create a "file" adapter, copying the demo CSV adapter
> ------------------------------------------------------
>
> Key: CALCITE-471
> URL: https://issues.apache.org/jira/browse/CALCITE-471
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Assignee: Julian Hyde
>
> The CSV adapter was intended as a demo. We should create a real,
> product-quality file adapter, by copying the CSV adapter, then letting people
> add features.
> [~lmccay] already suggested adding HDFS capabilities.
> Then the CSV adapter can remain simple enough to serve as a demo. We might
> even remove from it some recently added features, such as handling JSON and
> GZ files.
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