[ https://issues.apache.org/jira/browse/ARROW-8074?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Neal Richardson reassigned ARROW-8074: -------------------------------------- Assignee: Ben Kietzman (was: Neal Richardson) > [C++][Dataset] Support for file-like objects (buffers) in FileSystemDataset? > ---------------------------------------------------------------------------- > > Key: ARROW-8074 > URL: https://issues.apache.org/jira/browse/ARROW-8074 > Project: Apache Arrow > Issue Type: Improvement > Components: C++ - Dataset, Python > Reporter: Joris Van den Bossche > Assignee: Ben Kietzman > Priority: Major > Labels: pull-request-available > Time Spent: 0.5h > Remaining Estimate: 0h > > The current {{pyarrow.parquet.read_table}}/{{ParquetFile}} can work with > buffer (reader) objects (file-like objects, pyarrow.Buffer, > pyarrow.BufferReader) as input when dealing with single files. This > functionality is for example being used by pandas and kartothek (in addition > to being extensively used in our own tests as well). > While we could keep the old implementation to handle single files (which is > different from the ParquetDataset logic), there are also some advantages of > being able to handle this in the Datasets API. > For example, this would enable to filtering functionality of the datasets > API, also for this single-file buffers use case, which would be a nice > enhancement (currently, {{read_table}} does not support {{filters}} in case > of single files, which is eg why kartothek implements this themselves). > Would this be possible to support? > The {{arrow::dataset::FileSource}} already has PATH and BUFFER enum types > (https://github.com/apache/arrow/blob/08f8bff05af37921ff1e5a2b630ce1e7ec1c0ede/cpp/src/arrow/dataset/file_base.h#L46-L49), > so it seems in principle possible to create a FileSource (for a > FileSystemDataset / FileFragment) from a buffer instead of from a path? -- This message was sent by Atlassian Jira (v8.3.4#803005)