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https://issues.apache.org/jira/browse/CALCITE-2933?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16795777#comment-16795777
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Danny Chan commented on CALCITE-2933:
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[~zhztheplayer] May i take this issue, i would fix this if you aggree.
> 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: Improvement
> Affects Versions: 1.18.0
> Reporter: Hongze Zhang
> Priority: Major
>
> 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 the same value as the first one.
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