hanyuzheng7 opened a new pull request, #23171:
URL: https://github.com/apache/flink/pull/23171
## What is the purpose of the change
This is an implementation of ARRAY_INTERSECT function
Returns an array of the elements in the intersection of array1 and array2,
without duplicates.
## Brief change log
ARRAY_INTERSECT for Table API and SQL
## Syntax:
`ARRAY_INTERSECT(array1, array2)`
## Arguments:
array: An ARRAY to be handled.
## Returns:
Returns an array of the elements in the intersection of array1 and array2,
without duplicates..
## Examples:
`SELECT array_intersect(array(1, 2, 3), array(1, 3, 5));
[1,3]
`
## Verifying this change
CollectionFunctionsITCase
## see also:
spark https://spark.apache.org/docs/latest/api/sql/index.html#array_intersect
presto https://prestodb.io/docs/current/functions/array.html
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (yes / no)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (yes / no)
- The serializers: (yes / no / don't know)
- The runtime per-record code paths (performance sensitive): (yes / no /
don't know)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (yes / no / don't know)
- The S3 file system connector: (yes / no / don't know)
## Documentation
- Does this pull request introduce a new feature? (yes / no)
- If yes, how is the feature documented? (not applicable / docs / JavaDocs
/ not documented)
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