[
https://issues.apache.org/jira/browse/FLINK-13611?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17239041#comment-17239041
]
Zou commented on FLINK-13611:
-----------------------------
Big +1 for this feature, it is a very important feature for batch SQL, any
progress on this ticket? [~godfreyhe]
> Introduce analyze statistic utility to generate table & column statistics
> -------------------------------------------------------------------------
>
> Key: FLINK-13611
> URL: https://issues.apache.org/jira/browse/FLINK-13611
> Project: Flink
> Issue Type: New Feature
> Components: Table SQL / Planner
> Reporter: godfrey he
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> this issue aims to introduce a utility class to generate table & column
> statistics, the main steps include:
> 1. generate sql, like
> {code:sql}
> select approx_count_distinct(a) as ndv, count(1) - count(a) as nullCount,
> avg(char_length(a)) as avgLen, max(char_lenght(a)) as maxLen, max(a) as
> maxValue, min(a) as minValue, ... from MyTable
> {code}
> 2. execute the query
> 3. convert to the result to {{TableStats}} (maybe the source table is not a
> {{ConnectorCatalogTable}})
> 4. convert to {{TableStats}} to {{CatalogTableStatistics}} if needed
> This issue does not involve DDL(like {{ANALYZE TABLE XXX}}), however the DDL
> could use this utility class once it's supported.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
