Lawrence Chan created ARROW-2296:
------------------------------------
Summary: Add num_rows to file footer
Key: ARROW-2296
URL: https://issues.apache.org/jira/browse/ARROW-2296
Project: Apache Arrow
Issue Type: Improvement
Reporter: Lawrence Chan
Maybe I'm overlooking something, but I don't see something on the API surface
to get the number of rows in a arrow file without reading all the record
batches.
I'd like to propose that we add `num_rows` as a field to the footer so it's
easy to query without reading the whole file.
Meanwhile, before we get that added to the official format fbs, it would be
nice to have a method that iterates over the record batch headers and sums up
the lengths without reading the actual record batch body.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
