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https://issues.apache.org/jira/browse/FLINK-14599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16970121#comment-16970121
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Zhenghua Gao commented on FLINK-14599:
--------------------------------------

Reminder:
 * Tables defined by DDL is not supported in this PR since de/serializing 
DataTypes lost precision information. Would open another ticket to cover.
 * Built-in time functions/operators which use long to compute is not supported 
in this PR too. Would open another ticket to cover.

> Support precision of TimestampType in blink planner
> ---------------------------------------------------
>
>                 Key: FLINK-14599
>                 URL: https://issues.apache.org/jira/browse/FLINK-14599
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Table SQL / Planner
>            Reporter: Zhenghua Gao
>            Priority: Major
>
> Since FLINK-14080 introduced an internal representation(SqlTimestamp) of 
> TimestampType with precision. This subtask will replace current long with 
> SqlTimestamp, and let blink planner support precision of TimestampType.



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