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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2021/06/29 05:59:25 UTC
[GitHub] [arrow-datafusion] Dandandan opened a new issue #640: Optimize min/max queries based on table statistics
Dandandan opened a new issue #640:
URL: https://github.com/apache/arrow-datafusion/issues/640
**Is your feature request related to a problem or challenge? Please describe what you are trying to do.**
In #620 a feature has been added to optimize queries like `select count(*) from table`.
We can do the same with `min` / `max` queries (`select min(col) from table`).
**Describe the solution you'd like**
Get the table statistics based on the column name from the table provider.
**Describe alternatives you've considered**
**Additional context**
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[GitHub] [arrow-datafusion] alamb closed issue #640: Optimize min/max queries based on table statistics
Posted by GitBox <gi...@apache.org>.
alamb closed issue #640:
URL: https://github.com/apache/arrow-datafusion/issues/640
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[GitHub] [arrow-datafusion] Dandandan commented on issue #640: Optimize min/max queries based on table statistics
Posted by GitBox <gi...@apache.org>.
Dandandan commented on issue #640:
URL: https://github.com/apache/arrow-datafusion/issues/640#issuecomment-870903170
For it to work on parquet and in-memory data, a bit of work also has to be done there to summarize / expose those statistics.
https://github.com/apache/arrow-datafusion/issues/537
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[GitHub] [arrow-datafusion] Dandandan edited a comment on issue #640: Optimize min/max queries based on table statistics
Posted by GitBox <gi...@apache.org>.
Dandandan edited a comment on issue #640:
URL: https://github.com/apache/arrow-datafusion/issues/640#issuecomment-870903170
For it to work on parquet and in-memory data, a bit of work also has to be done there to summarize / expose those statistics.
see:
https://github.com/apache/arrow-datafusion/issues/537
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[GitHub] [arrow-datafusion] alamb commented on issue #640: Optimize min/max queries based on table statistics
Posted by GitBox <gi...@apache.org>.
alamb commented on issue #640:
URL: https://github.com/apache/arrow-datafusion/issues/640#issuecomment-870813510
Following the example in https://github.com/apache/arrow-datafusion/pull/620 probably makes this PR fairly approachable to anyone who is interested
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[GitHub] [arrow-datafusion] b41sh commented on issue #640: Optimize min/max queries based on table statistics
Posted by GitBox <gi...@apache.org>.
b41sh commented on issue #640:
URL: https://github.com/apache/arrow-datafusion/issues/640#issuecomment-871269286
I'd like to do this.
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[GitHub] [arrow-datafusion] alamb commented on issue #640: Optimize min/max queries based on table statistics
Posted by GitBox <gi...@apache.org>.
alamb commented on issue #640:
URL: https://github.com/apache/arrow-datafusion/issues/640#issuecomment-871711405
Assigning to @b41sh per request. Thank you!
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