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Posted to issues@flink.apache.org by "Fabian Hueske (JIRA)" <ji...@apache.org> on 2017/02/14 14:37:42 UTC

[jira] [Closed] (FLINK-5566) Introduce structure to hold table and column level statistics

     [ https://issues.apache.org/jira/browse/FLINK-5566?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Fabian Hueske closed FLINK-5566.
--------------------------------
       Resolution: Fixed
    Fix Version/s: 1.3.0

Implemented with 663c1e3f773ab1a19f8fb87a8fb5a7f95496cc36

> Introduce structure to hold table and column level statistics
> -------------------------------------------------------------
>
>                 Key: FLINK-5566
>                 URL: https://issues.apache.org/jira/browse/FLINK-5566
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Table API & SQL
>            Reporter: Kurt Young
>            Assignee: zhangjing
>             Fix For: 1.3.0
>
>
> We define two structure mode to hold statistics
> 1. TableStats: contain stats for table level, now only one element: rowCount
> 2. ColumnStats: contain stats of column level. 
> for numeric column type: including ndv, nullCount, max, min, histogram
> for string type: including ndv, nullCount, avgLen,maxLen
> for boolean:including ndv, nullCount, trueCount, falseCount
> for date/time/timestamp:  including ndv, nullCount, max, min, histogram 



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