[ https://issues.apache.org/jira/browse/CALCITE-2040?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
hongyu guo resolved CALCITE-2040. --------------------------------- Resolution: Fixed Fixed in [d4e8830|[https://github.com/apache/calcite/commit/d4e88302e367b7f5a3b3da9d2e0f734320cef413].] Thanks all contributors! > 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: hongyu guo > Priority: Major > Labels: pull-request-available > Fix For: 1.37.0 > > Attachments: arrow_data.py > > Time Spent: 1.5h > 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. -- This message was sent by Atlassian Jira (v8.20.10#820010)