ES|QL: Set FUSE to execute on coordinator#135515
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ioanatia merged 4 commits intoelastic:mainfrom Sep 26, 2025
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Pinging @elastic/es-search-relevance (Team:Search Relevance) |
carlosdelest
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Sep 26, 2025
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carlosdelest
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This is nice. 👍
TIL about PipelineBreaker and ExecutesOn.
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| ROW _id = ["a", "b", "c"], _score = 0.0, _index = "my_index", my_fork = "foo" | ||
| | MV_EXPAND _id | ||
| | LIMIT 10 |
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Nit - I understand why this is needed, but probably makes no sense in practice. Maybe we can check that there's a ROW at the top and avoid the need for LIMIT in that case, as input will be already limited?
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I guess the usage of ROW is limited in practice, especially in combination with FUSE, but I added a note in #123389 and will definitely look into this as a follow up.
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Tracked in #123389
FUSE supports RRF and linear combination as the two method to assign new relevance scores.
FUSE cannot be pushed down to the data nodes, it needs to see the whole result set in order to assign new scores.
Because of this we need to:
ExecutesOn.CoordinatorandPipelineBreakertoFuseScoreEval.What this means practically is that the we are looking for another
PipelineBreakerexists before FUSE.