feat: ingest support for numeric typed ExpressionLambdaAggregatorFactory#19508
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gianm
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May 23, 2026
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Description
This PR adds an
AggregateCombinerimplementation forExpressionLambdaAggregatorFactory, allowing it to be used at ingestion time for the two primitive numeric types (LONGandDOUBLE) when both fold and combine expressions are the same type (by examininginitialValue/initialCombineValue). Other types (strings, arrays, complex types) continue to fall through to the baseUOE, supporting those is more complicated and is left for a follow-up.Release note
The expression aggregator can now be used at ingestion time for expressions which produce a
LONGorDOUBLEfor bothfoldandcombineexpressions.