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https://issues.apache.org/jira/browse/FLINK-11711?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16773850#comment-16773850
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Flavio Pompermaier edited comment on FLINK-11711 at 9/27/19 7:46 AM:
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We've just published a computation of those statistics on Flink 1.6.2 at
[https://github.com/okkam-it/flink-descriptive-stats].
Maybe there you can find something useful that you didn't take into account
(such as stdDev, kurtosis, skewness, etc)
was (Author: f.pompermaier):
We've just published a computation of those statistics on Flink 1.6.2 at
[https://github.com/okkam-it/flink-descriptive-stats.]
Maybe there you can find something useful that you didn't take into account
(such as stdDev, kurtosis, skewness, etc)
> Add table and column stats
> --------------------------
>
> Key: FLINK-11711
> URL: https://issues.apache.org/jira/browse/FLINK-11711
> Project: Flink
> Issue Type: New Feature
> Components: Table SQL / Planner
> Reporter: godfrey he
> Assignee: godfrey he
> Priority: Major
> Labels: pull-request-available
> Time Spent: 20m
> Remaining Estimate: 0h
>
> We define two structure mode to hold statistics
> 1. TableStats: statistics for table level, contains 2 elements:
> rowCount: Long // the number of row count of table
> colStats: Map[String, ColumnStats] // map each column to its ColumnStats
> 2. ColumnStats: statistics for column level, contains 6 elements:
> ndv: Long // number of distinct values
> nullCount: Long // number of null values
> avgLen: Double // average length of column values
> maxLen: Integer // max length of column values
> max: Any // max value of column values
> min: Any // min value of column values
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