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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