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https://issues.apache.org/jira/browse/CALCITE-2040?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17325314#comment-17325314
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Julian Hyde commented on CALCITE-2040:
--------------------------------------
It seems that ARROW-11135 is not going to make it into Arrow 4.0 (they are just
rolling out the first release candidate). No one seems interested in working on
it. This case is blocked until that bug is fixed.
If anyone is willing and able to fix ARROW-11135, I would be grateful.
> Create adapter for Apache Arrow
> -------------------------------
>
> Key: CALCITE-2040
> URL: https://issues.apache.org/jira/browse/CALCITE-2040
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Assignee: Julian Hyde
> Priority: Major
> Labels: pull-request-available
> Attachments: arrow_data.py
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> Create an adapter for [Apache Arrow|http://arrow.apache.org/]. This would
> allow people to execute SQL statements, via JDBC or ODBC, on data stored in
> Arrow in-memory format.
> Since Arrow is an in-memory format, it is not as straightforward as reading,
> say, CSV files using the file adapter: an Arrow data set does not have a URL.
> (Unless we use Arrow's
> [Feather|https://blog.cloudera.com/blog/2016/03/feather-a-fast-on-disk-format-for-data-frames-for-r-and-python-powered-by-apache-arrow/]
> format, or use an in-memory file system such as Alluxio.) So we would need
> to devise a way of addressing Arrow data sets.
> Also, since Arrow is an extremely efficient format for processing data, it
> would also be good to have Arrow as a calling convention. That is,
> implementations of relational operators such as Filter, Project, Aggregate in
> addition to just TableScan.
> Lastly, when we have an Arrow convention, if we build adapters for file
> formats (for instance the bioinformatics formats SAM, VCF, FASTQ discussed in
> CALCITE-2025) it would make a lot of sense to translate those formats
> directly into Arrow (applying simple projects and filters first if
> applicable). Those adapters would belong as a "contrib" module in the Arrow
> project better than in Calcite.
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