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Posted to jira@arrow.apache.org by "Joris Van den Bossche (Jira)" <ji...@apache.org> on 2020/07/14 08:46:00 UTC
[jira] [Updated] (ARROW-9459) [C++][Dataset] Make
collecting/parsing statistics optional for ParquetFragment
[ https://issues.apache.org/jira/browse/ARROW-9459?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Joris Van den Bossche updated ARROW-9459:
-----------------------------------------
Description:
See some timing checks here: https://github.com/dask/dask/pull/6346#issuecomment-656548675
Parsing all statistics, even from a centralized {{_metadata}} file, can be quite expensive. If you know in advance that you are not going to use them (eg you are only going to do filtering on the partition fields, and otherwise read all data), it could be nice to have an option to disable parsing statistics.
cc [~rjzamora] [~bkietz] [~fsaintjacques]
was:
See some timing checks here: https://github.com/dask/dask/pull/6346#issuecomment-656548675
Parsing all statistics, even from a centralized {{_metadata}} file can be quite expensive. If you know in advance that you are not going to use them (eg you are only going to do filtering on the partition fields, and otherwise read all data), it could be nice to have an option to disable parsing statistics.
cc [~rjzamora] [~bkietz] [~fsaintjacques]
> [C++][Dataset] Make collecting/parsing statistics optional for ParquetFragment
> ------------------------------------------------------------------------------
>
> Key: ARROW-9459
> URL: https://issues.apache.org/jira/browse/ARROW-9459
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Joris Van den Bossche
> Priority: Major
> Labels: dataset, dataset-dask-integration
>
> See some timing checks here: https://github.com/dask/dask/pull/6346#issuecomment-656548675
> Parsing all statistics, even from a centralized {{_metadata}} file, can be quite expensive. If you know in advance that you are not going to use them (eg you are only going to do filtering on the partition fields, and otherwise read all data), it could be nice to have an option to disable parsing statistics.
> cc [~rjzamora] [~bkietz] [~fsaintjacques]
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