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Posted to issues@arrow.apache.org by "Wes McKinney (JIRA)" <ji...@apache.org> on 2017/11/26 16:45:00 UTC
[jira] [Created] (ARROW-1860) [C++] Add data structure to "stage" a
sequence of IPC messages from in-memory data
Wes McKinney created ARROW-1860:
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Summary: [C++] Add data structure to "stage" a sequence of IPC messages from in-memory data
Key: ARROW-1860
URL: https://issues.apache.org/jira/browse/ARROW-1860
Project: Apache Arrow
Issue Type: New Feature
Components: C++
Reporter: Wes McKinney
Currently, when you need to pre-allocate space for a record batch or a stream (schema + dictionaries + record batches), you must make multiple passes over the data structures of interest (and use e.g. {{MockOutputStream}} to compute the size of the output buffer). It would be useful to make a single pass to "prepare" the IPC payload for both sizing and writing to prevent having to make multiple passes
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