[jira] [Resolved] (CALCITE-2933) In Druid adapter, expression like "cast(cast(\"timestamp\" as timestamp) as varchar)" returns as epoch millisecond

["Danny Chan (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-2933?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Danny Chan resolved CALCITE-2933.
---------------------------------
       Resolution: Fixed
    Fix Version/s: 1.20.0

> In Druid adapter, expression like "cast(cast(\"timestamp\" as timestamp) as varchar)" returns as epoch millisecond
> ------------------------------------------------------------------------------------------------------------------
>
>                 Key: CALCITE-2933
>                 URL: https://issues.apache.org/jira/browse/CALCITE-2933
>             Project: Calcite
>          Issue Type: Bug
>    Affects Versions: 1.18.0
>            Reporter: Hongze Zhang
>            Assignee: Danny Chan
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.20.0
>
>          Time Spent: 1h 10m
>  Remaining Estimate: 0h
>
> SQL 1:
> {code}
> select cast("timestamp" as timestamp) as t from "foodmart" order by t limit 1
> {code}
> Result:
> {code}
> T=1997-01-01 00:00:00
> {code}
> SQL 2:
> {code}
> select cast(cast("timestamp" as timestamp) as varchar) as t from "foodmart" order by t limit 1
> {code}
> Result:
> {code}
> T=852076800000
> {code}
> The second query should returns with the same format as the first one.
> See test case:
> https://github.com/apache/calcite/blob/1229ef27094ea73ad9c7a397f442285c7e1df9b0/druid/src/test/java/org/apache/calcite/test/DruidAdapterIT2.java#L3930



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