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https://issues.apache.org/jira/browse/CALCITE-2699?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16696474#comment-16696474
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xuqianjin commented on CALCITE-2699:
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I want to try to fix it

> The bug of timestampadd  handles time
> -------------------------------------
>
>                 Key: CALCITE-2699
>                 URL: https://issues.apache.org/jira/browse/CALCITE-2699
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.17.0, 1.18.0
>            Reporter: xuqianjin
>            Assignee: Julian Hyde
>            Priority: Major
>
> Two errors occur when {{timestampadd(MINUTE, 1, time '01:00:00')}} is 
> executed:
>  # The return result can only be of {{TimeStamp}} type and is expected to be 
> of {{Time}} type
>  # The return value is {{1970-01-01 01:01:00}}, and the expectation is 
> {{01:01:00}}
>  # Compared with {{mysql}} database, I think it should meet the following 
> conditions:
> ||expression||Expect the result||
> |timestampadd(MINUTE, -1, time '00:00:00')|NULL|
> |timestampadd(MINUTE, 1, time '00:00:00')|00:01:00|
> |timestampadd(MINUTE, 1, time '23:59:59')|00:00:59|
> |timestampadd(SECOND, 1, time '23:59:59')|00:00:00|
> |timestampadd(HOUR, 1, time '23:59:59')|00:59:59|



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