[FLINK-40357][table] Add ARRAY_FLATTEN function to Flink SQL - #28945
Open
cytq-123 wants to merge 9 commits into
Open
[FLINK-40357][table] Add ARRAY_FLATTEN function to Flink SQL#28945cytq-123 wants to merge 9 commits into
cytq-123 wants to merge 9 commits into
Conversation
Collaborator
…rrays and single element)
davidradl
reviewed
Aug 28, 2026
| "org.apache.flink.table.runtime.functions.scalar.ArrayConcatFunction") | ||
| .build(); | ||
|
|
||
| public static final BuiltInFunctionDefinition ARRAY_FLATTEN = |
Contributor
There was a problem hiding this comment.
please could you add documentation for this (Chinese and English)
Author
There was a problem hiding this comment.
Done! Added documentation in:
- docs/data/sql_functions.yml (English)
- docs/data/sql_functions_zh.yml (Chinese)
davidradl
reviewed
Aug 28, 2026
|
|
||
| private Stream<TestSetSpec> arrayFlattenTestCases() { | ||
| return Stream.of( | ||
| TestSetSpec.forFunction(BuiltInFunctionDefinitions.ARRAY_FLATTEN) |
Contributor
There was a problem hiding this comment.
Please could you add error cases to the tests.
Author
There was a problem hiding this comment.
Done! Added error validation test case for one-dimensional array input in CollectionFunctionsITCase.java:
- testSqlValidationError for SQL API
- testTableApiValidationError for Table API
- Add English and Chinese documentation in sql_functions.yml and sql_functions_zh.yml - Add error validation test case for one-dimensional array input - Address review feedback from davidradl
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
3 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
What is the purpose of the change
This PR adds the
ARRAY_FLATTENfunction to Flink SQL, which flattens a nested array by one level.Brief change log
ARRAY_FLATTENfunction definition inBuiltInFunctionDefinitionsArrayFlattenFunctionruntime classSpecificTypeStrategiesCollectionFunctionsITCaseVerifying this change
This change added tests and can be verified as follows:
CollectionFunctionsITCase#arrayFlattenTestCases()Does this pull request potentially affect one of the following parts:
Documentation