[FLINK-38520][postgres] Postgres YAML CDC support array with null element#4254
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Pull request overview
This PR enhances PostgreSQL array handling in Flink CDC to properly support arrays containing null elements. The changes refactor error handling for multidimensional arrays and ensure that arrays with null values are correctly deserialized.
Changes:
- Refactored array conversion logic to check for multidimensional arrays upfront and simplified null element handling
- Fixed grammatical error in multidimensional array error message ("Unable convert" → "Unable to convert")
- Added comprehensive test coverage for arrays with null elements including SQL DDL and integration test
Reviewed changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| DebeziumEventDeserializationSchema.java | Refactored convertToArray method to handle null elements correctly and check for multidimensional arrays earlier |
| column_type_test.sql | Added new test table array_types_with_null with sample data containing null elements in arrays |
| PostgresFullTypesITCase.java | Added testArrayTypesWithNull test method and updated error message assertion in existing test |
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This close https://issues.apache.org/jira/browse/FLINK-38520
This pull request improves the handling of PostgreSQL array types in Flink CDC, specifically ensuring that arrays containing
nullelements are correctly deserialized and tested. It also refines error handling for unsupported multidimensional arrays.