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Posted to issues@flink.apache.org by "Leonard Xu (Jira)" <ji...@apache.org> on 2020/08/31 02:59:00 UTC
[jira] [Updated] (FLINK-19094) Revise the description of watermark
strategy in Flink Table document
[ https://issues.apache.org/jira/browse/FLINK-19094?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Leonard Xu updated FLINK-19094:
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Summary: Revise the description of watermark strategy in Flink Table document (was: Revise the description watermark strategy in Flink Table document )
> Revise the description of watermark strategy in Flink Table document
> ---------------------------------------------------------------------
>
> Key: FLINK-19094
> URL: https://issues.apache.org/jira/browse/FLINK-19094
> Project: Flink
> Issue Type: Bug
> Components: Documentation
> Affects Versions: 1.10.0, 1.11.0
> Reporter: Leonard Xu
> Priority: Major
> Fix For: 1.12.0, 1.11.2, 1.10.3
>
>
> The description of watermark strategy is wrong in doc[1]
> * Strictly ascending timestamps: {{WATERMARK FOR rowtime_column AS rowtime_column}}.
> Emits a watermark of the maximum observed timestamp so far. -Rows that have a timestamp smaller to the max timestamp are not late.-
> * Ascending timestamps: {{WATERMARK FOR rowtime_column AS rowtime_column - INTERVAL '0.001' SECOND}}.
> Emits a watermark of the maximum observed timestamp so far minus 1. -Rows that have a timestamp equal and smaller to the max timestamp are not late.-
> [1] [https://ci.apache.org/projects/flink/flink-docs-release-1.10/dev/table/sql/create.html]
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