[7.x][ML] Prevent fetching multi-field from source (#48770) #48797
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Aggregatable mutli-fields are at the moment wrongly mapped as normal doc_value fields and thus they support fetching from source. However, they do not exist in the source. This results to failure to extract such fields. This commit fixes this bug. While a fix could be worked out on top of the existing code, it is evident the extraction logic has become difficult to understand and maintain. As we also want to deduplicate multi-fields for data frame analytics, it seemed appropriate to refactor the code to simplify and better handle the extraction of multi-fields. Relates elastic#48756 Backport of elastic#48770
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Pinging @elastic/ml-core (:ml) |
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run elasticsearch-ci/bwc |
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run elasticsearch-ci/default-distro |
dimitris-athanasiou
deleted the
prevent-fetching-multi-field-from-source-7x
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Aggregatable mutli-fields are at the moment wrongly mapped
as normal doc_value fields and thus they support fetching from
source. However, they do not exist in the source. This results
to failure to extract such fields.
This commit fixes this bug. While a fix could be worked out
on top of the existing code, it is evident the extraction logic
has become difficult to understand and maintain. As we also
want to deduplicate multi-fields for data frame analytics,
it seemed appropriate to refactor the code to simplify and
better handle the extraction of multi-fields.
Relates #48756
Backport of #48770