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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/07/22 02:23:08 UTC
[GitHub] [arrow-rs] liukun4515 opened a new issue, #2126: Support filter for parquet data type
liukun4515 opened a new issue, #2126:
URL: https://github.com/apache/arrow-rs/issues/2126
**Is your feature request related to a problem or challenge? Please describe what you are trying to do.**
Currently, we want to filter a column in parquet file whose logical data type is decimal or string.
In the parquet, the data of decimal and string will be stored as `binary` and `fixed_len_binary`.
parquet-rs doesn't has the `filter` system or the comparison system.
**Describe the solution you'd like**
implement the `filter` system and comparison system in parquet-rs.
**Describe alternatives you've considered**
A clear and concise description of any alternative solutions or features you've considered.
**Additional context**
Add any other context or screenshots about the feature request here.
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[GitHub] [arrow-rs] liukun4515 commented on issue #2126: Support filter for parquet data type
Posted by GitBox <gi...@apache.org>.
liukun4515 commented on issue #2126:
URL: https://github.com/apache/arrow-rs/issues/2126#issuecomment-1192112831
Do you have any opinions and suggestions?
@tustvold @Ted-Jiang @alamb
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[GitHub] [arrow-rs] alamb commented on issue #2126: Support filter for parquet data type
Posted by GitBox <gi...@apache.org>.
alamb commented on issue #2126:
URL: https://github.com/apache/arrow-rs/issues/2126#issuecomment-1192719943
Are you thinking about something like "apply some predicate on a parquet binary column and then only decode pages from other columns that might have matching positions" 🤔
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[GitHub] [arrow-rs] tustvold commented on issue #2126: Support filter for parquet data type
Posted by GitBox <gi...@apache.org>.
tustvold commented on issue #2126:
URL: https://github.com/apache/arrow-rs/issues/2126#issuecomment-1192571772
Could you perhaps expand a bit on what API you are expecting for this, I'm not entirely sure what you mean by supporting a `filter` or comparison system within parquet-rs?
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[GitHub] [arrow-rs] liukun4515 commented on issue #2126: Support filter for parquet data type
Posted by GitBox <gi...@apache.org>.
liukun4515 commented on issue #2126:
URL: https://github.com/apache/arrow-rs/issues/2126#issuecomment-1196237933
This has been resolved in the datafusion I have found.
we convert the parquet statistic data to arrow array/ arrow data and apply the filter/predication to them.
Thanks @alamb @tustvold
I will close this issue
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[GitHub] [arrow-rs] liukun4515 closed issue #2126: Support filter for parquet data type
Posted by GitBox <gi...@apache.org>.
liukun4515 closed issue #2126: Support filter for parquet data type
URL: https://github.com/apache/arrow-rs/issues/2126
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