PyRSA opened a new pull request, #8048:
URL: https://github.com/apache/paimon/pull/8048
[core] Support nested sequence fields in FieldNestedUpdateAgg operator
### Purpose
[Feature] Add field.{fieldName}.nested-sequence-field configuration for
nested_update function
[Feature] Support sequence fields in FieldNestedUpdateAgg operator to ensure
correct data updates
Expected behavior:
| **case** | **Input A**
| **Input B**
| **Current Output**
| **Expected Output** |
| ---------------------------------------------- |
------------------------------------------------------------ |
------------------------------------------------------------ |
------------------------------------------------------------ |
------------------------------------------------------------ |
| Single Seq Out-of-order | [(0, 0, "A", 1), (0, 1,
"b", 3)] | [(0, 1, "B_late", 2)]
| [(0, 0, "A", 1), (0, 1, "B_late", 2)] ❌
| [(0, 0, "A", 1), (0, 1, "b", 3)] |
| Multi Seq Out-of-order - Primary Wins | [(1, 0, "A", 1, ts3), (0,
1, "B", 2, ts1), (1, 1, "C", 1, ts2)] | [(0, 1, "b_ignored", 1, ts3), (1, 1,
"C_updated_by_ts", 1, ts3)] | [(1, 0, "A", 1, ts3), (0, 1, "b_ignored", 1,
ts3), (1, 1, "C_updated_by_ts", 1, ts3)] ❌ | [(1, 0, "A", 1, ts3), (0, 1, "B",
2, ts1), (1, 1, "C_updated_by_ts", 1, ts3)] |
| Multi Seq Out-of-order - Secondary Tie-breaker | [(1, 0, "A", 1, ts2), (0,
1, "B", 2, ts1), (1, 1, "C", 1, ts2)] | [(1, 0, "A_late_updated_by_ts", 1,
ts1)] | [(1, 0, "A_late_updated_by_ts", 1, ts1), (0, 1,
"B", 2, ts1), (1, 1, "C", 1, ts2)] ❌ | [(1, 0, "A", 1, ts2), (0, 1, "B", 2,
ts1), (1, 1, "C", 1, ts2)] |
### Tests
-
org.apache.paimon.mergetree.compact.aggregate.FieldAggregatorTest#testFieldNestedUpdateAggWithSequenceField
-
org.apache.paimon.mergetree.compact.aggregate.FieldAggregatorTest#testFieldNestedUpdateAggWithMultipleSequenceFields
-
org.apache.paimon.mergetree.compact.aggregate.FieldAggregatorTest#testFieldNestedUpdateAggWithSequenceFieldWithoutNestedKey
-
org.apache.paimon.mergetree.compact.aggregate.FieldAggregatorTest#testFieldNestedUpdateAggWithCountLimitWithSequenceFieldWithoutNestedKey
-
org.apache.paimon.mergetree.compact.aggregate.FieldAggregatorTest#testFieldNestedUpdateAggWithCountLimitWithSequenceField
### API and Format
No Changes.
### Documentation
docs/docs/primary-key-table/merge-engine/aggregation.mdx
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