PyRSA opened a new pull request, #8461:
URL: https://github.com/apache/paimon/pull/8461
### Purpose
[Feature] Add `fields.{fieldName}.nested-key-null-strategy` configuration
for `nested_partial_update` function
[Feature] Support nested-key null handling strategies in
`FieldNestedPartialUpdateAgg` operator to control behavior when nested-key does
not satisfy primary key semantics
### Tests
org.apache.paimon.mergetree.compact.aggregate.FieldAggregatorTest#testFieldNestedPartialUpdateAgg
org.apache.paimon.mergetree.compact.aggregate.FieldAggregatorTest#testFieldNestedPartialUpdateAggWithNestedKeyNullUseIgnoreStrategy
org.apache.paimon.mergetree.compact.aggregate.FieldAggregatorTest#testFieldNestedPartialUpdateAggWithNestedKeyNullUseThrowErrorStrategy
### API and Format
No Changes.
### Documentation
docs/docs/primary-key-table/merge-engine/aggregation.mdx
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