[jira] [Resolved] (FLINK-40481) SHOW CREATE MATERIALIZED TABLE displays a future timestamp for FROM_NOW() instead of past

["Arvid Heise (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-40481?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Arvid Heise resolved FLINK-40481.
---------------------------------
    Fix Version/s: 2.4.0
       Resolution: Fixed

> SHOW CREATE MATERIALIZED TABLE displays a future timestamp for FROM_NOW(<interval>) instead of past
> ---------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-40481
>                 URL: https://issues.apache.org/jira/browse/FLINK-40481
>             Project: Flink
>          Issue Type: Bug
>          Components: Table SQL / API
>    Affects Versions: 2.3.0
>            Reporter: Arvid Heise
>            Assignee: Arvid Heise
>            Priority: Minor
>              Labels: pull-request-available
>             Fix For: 2.4.0
>
>
> {noformat}
> CREATE MATERIALIZED TABLE mt
> START_MODE = FROM_NOW(INTERVAL '3' MINUTE)
> AS SELECT ...
> SHOW CREATE TABLE mt;
> -- START_MODE = FROM_NOW(INTERVAL '3' MINUTE) /* Evaluated to FROM_TIMESTAMP(TIMESTAMP '2026-08-27 09:43:12') at execution */
> {noformat}
> Statement created at {{2026-08-27 09:40:12}}. The comment claims resolution to {{09:43:12}} — three minutes in the future. The actual runtime resolution of {{FROM_NOW(<interval>)}} reads from three minutes in the past (documented semantics, matching Kafka's relative-offset behavior); only the {{SHOW CREATE}} annotation is wrong.
> {{ShowCreateUtil.extractStartMode}} builds the comment with:
> {code:java}
> LocalDateTime.now().plus(amount).toInstant(ZoneOffset.UTC)
> {code}
> which should be {{.minus(amount)}}. Introduced in FLINK-39323.



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