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https://issues.apache.org/jira/browse/FLINK-25558?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paul Lin resolved FLINK-25558.
------------------------------
Resolution: Fixed
> TableResult OK may be empty if returned by multiple queries
> -----------------------------------------------------------
>
> Key: FLINK-25558
> URL: https://issues.apache.org/jira/browse/FLINK-25558
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / API
> Affects Versions: 1.14.0
> Reporter: Paul Lin
> Priority: Major
>
> Many queries return `TABLE_RESULT_OK`, which is a static member for reducing
> memory overhead. However, TableResult contains an iterator that can be read
> once. That means if a query returns `TABLE_RESULT_OK` and it is read,
> then`TABLE_RESULT_OK` returned by the following queries would be considered
> empty.
> It can be reproduced by simply printing two query results.
> ```
> tEnv.executeSql("create table tbl_a (a string)").print();
> tEnv.executeSql("create table tbl_b (a string)").print();
> ```
> The output would be
> ```
> +--------+
> | result |
> +--------+
> | OK |
> +--------+
> 1 row in set
> Empty set
> ```
>
>
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