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https://issues.apache.org/jira/browse/FLINK-28620?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17733900#comment-17733900
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Sergey Nuyanzin commented on FLINK-28620:
-----------------------------------------
[~jark] it looks like it was fixed at some point of time
currently i can not reproduce it...
should we still have it opened?
> SQL Client doesn't properly print values of INTERVAL type
> ---------------------------------------------------------
>
> Key: FLINK-28620
> URL: https://issues.apache.org/jira/browse/FLINK-28620
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Client
> Reporter: Jark Wu
> Assignee: Jark Wu
> Priority: Major
> Fix For: 1.18.0
>
>
> The display of values of interval type should follow the CAST rules. However,
> currently, SQL Client prints it using {{Period.toString()}} and
> {{Duration.toString()}} which is not SQL standard compliant.
> {code}
> Flink SQL> select interval '9-11' year to month;
> +--------+
> | EXPR$0 |
> +--------+
> | P119M |
> +--------+
> 1 row in set
> Flink SQL> select cast(interval '9-11' year to month as varchar);
> +--------+
> | EXPR$0 |
> +--------+
> | +9-11 |
> +--------+
> 1 row in set
> Flink SQL> select interval '2 1:2:3' day to second;
> +-----------+
> | EXPR$0 |
> +-----------+
> | PT49H2M3S |
> +-----------+
> 1 row in set
> Flink SQL> select cast(interval '2 1:2:3' day to second as varchar);
> +-----------------+
> | EXPR$0 |
> +-----------------+
> | +2 01:02:03.000 |
> +-----------------+
> 1 row in set
> {code}
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