[Star Tree] [Search] Nested Bucket Aggregations #17274
Description
Is your feature request related to a problem? Please describe
The following aggregations are already supported/in-flight which can be resolved via star-tree:
- Numeric terms
- Keyword terms
- Date histograms
- Range aggregations
- Metric aggregations
Right now, in these aggregations, the child aggregation is only restricted to metric aggregations. We can actually support nesting of the above aggregations as well with the existing framework.
Describe the solution you'd like
Benchmark the different nested aggregations to see performance improvements with the usage of star-tree resolution.
While setting up star-tree we do a very strict matching on query shapes right now. This should ideally be a recursive query matching to see valid query shapes which can be resolved via star-tree.
Related component
Search:Aggregations
Describe alternatives you've considered
No response
Additional context
No response