leonardBang opened a new pull request #15374:
URL: https://github.com/apache/flink/pull/15374
## What is the purpose of the change
Currently we has supported the cast conversion between Numeric type and
TIMESTAMP_LTZ type, we suppose the numeric value e.g `Long type 1000L` as epoch
seconds and then cast to TIMESTAMP_LTZ, but the java.lang.Long is a conversion
class of `LocalZonedTimestampType` and treats as milliseconds.
To avoid the inconsistency, we disable it and encourage user to use
`TO_TIMESTAMP_LTZ(numeric, precision)`.
## Brief change log
- Disable the cast conversion between Numeric type and TIMESTAMP_LTZ
- Improve `TO_TIMESTAMP_LTZ` that requires two parameters
## Verifying this change
Add unit test to cover the cast conversion and function
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (no)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (no)
- The serializers: (no)
- The runtime per-record code paths (performance sensitive): ( no)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Yarn/Mesos, ZooKeeper: (no)
- The S3 file system connector: (no)
## Documentation
- Does this pull request introduce a new feature? (no)
- If yes, how is the feature documented? (not applicable / docs / JavaDocs
/ not documented)
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