[jira] [Comment Edited] (CALCITE-4223) Introducing column statistics to RelOptTable

["Chunwei Lei (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CALCITE-4223?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17567773#comment-17567773 ] 

Chunwei Lei edited comment on CALCITE-4223 at 7/18/22 2:08 AM:
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I would like to merge the PR in the next 48 hours if no objections appear.


was (Author: chunwei lei):
I would like to merge the PR in the next 48hours if no objections appear.

> Introducing column statistics to RelOptTable
> --------------------------------------------
>
>                 Key: CALCITE-4223
>                 URL: https://issues.apache.org/jira/browse/CALCITE-4223
>             Project: Calcite
>          Issue Type: Improvement
>            Reporter: Chunwei Lei
>            Assignee: Chunwei Lei
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 2h 10m
>  Remaining Estimate: 0h
>
> Many systems depend on column statistics to compute more accurate stats, such as NDV, average column size, and so on. It would be nice if Calcite can provide such an interface.
> Column statistics might include NDV, average/max column length, number of nulls, number of trues, number of falses and so on. 
> What do you think?
>  



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