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Posted to dev@flink.apache.org by "Jark Wu (Jira)" <ji...@apache.org> on 2020/03/31 17:12:00 UTC
[jira] [Created] (FLINK-16889) Support converting BIGINT to
TIMESTAMP for TO_TIMESTAMP function
Jark Wu created FLINK-16889:
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Summary: Support converting BIGINT to TIMESTAMP for TO_TIMESTAMP function
Key: FLINK-16889
URL: https://issues.apache.org/jira/browse/FLINK-16889
Project: Flink
Issue Type: New Feature
Components: Table SQL / API, Table SQL / Planner
Reporter: Jark Wu
Fix For: 1.11.0
Many users reported that it is not possible for now to define an event-time field or watermark on a BIGINT column.
Impala supports to convert BIGINT into TIMESTAMP value using TO_TIMESTAMP() function [1]. The BIGINT argument represents the number of seconds past the epoch.
I think it makes sense to support this for Flink's TO_TIMESTAMP(). It is the converse of the UNIX_TIMESTAMP() function, which produces a BIGINT representing the number of seconds past the epoch.
[1]: https://impala.apache.org/docs/build/html/topics/impala_datetime_functions.html#datetime_functions__to_timestamp
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