[
https://issues.apache.org/jira/browse/CALCITE-4223?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17192361#comment-17192361
]
Julian Hyde commented on CALCITE-4223:
--------------------------------------
[~Chunwei Lei] wrote:
bq. RelOptTable does not provide a method to get Statistic.
Now that I've told you about {{Wrapper.unwrap}}, can you reconsider this
request to modify {{RelOptTable}}?
> 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
>
> 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?
>
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
