Neal Richardson created ARROW-10406:
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Summary: [C++] Support dictionary replacement when writing IPC
files
Key: ARROW-10406
URL: https://issues.apache.org/jira/browse/ARROW-10406
Project: Apache Arrow
Issue Type: New Feature
Components: C++
Reporter: Neal Richardson
Assignee: Antoine Pitrou
Fix For: 3.0.0
I read a big (taxi) csv file and specified that I wanted to dictionary-encode
some columns. The resulting Table has ChunkedArrays with 1604 chunks. When I go
to write this Table to the IPC file format (write_feather), I get an error:
{code}
Invalid: Dictionary replacement detected when writing IPC file format. Arrow
IPC files only support a single dictionary for a given field accross all
batches.
{code}
I can write this to Parquet and read it back in, and the roundtrip of the data
is correct. We should be able to do this in IPC too.
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