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[DOCS] Add transform limitation for underscore field names (#86195)

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Lisa Cawley 2022-04-26 12:44:14 -07:00 • committed by GitHub
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docs/reference/transform/limitations.asciidoc
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@ -22,6 +22,14 @@ categories:
[[transform-config-limitations]] [[transform-config-limitations]]
== Configuration limitations == Configuration limitations
[discrete]
[[transforms-underscore-limitation]]
=== Field names prefixed with underscores are omitted from latest {transforms}
If you use the `latest` type of {transform} and the source index has field names
that start with an underscore (_) character, they are assumed to be internal
fields. Those fields are omitted from the documents in the destination index.
[discrete] [discrete]
[[transforms-ccs-limitation]] [[transforms-ccs-limitation]]
=== {transforms-cap} support {ccs} if the remote cluster is configured properly === {transforms-cap} support {ccs} if the remote cluster is configured properly