From dd885e28faa92c8e38d2df4b6860ee7abe374b3b Mon Sep 17 00:00:00 2001 From: Lisa Cawley Date: Tue, 26 Apr 2022 12:44:14 -0700 Subject: [PATCH] [DOCS] Add transform limitation for underscore field names (#86195) --- docs/reference/transform/limitations.asciidoc | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/docs/reference/transform/limitations.asciidoc b/docs/reference/transform/limitations.asciidoc index 0e813a81f39d..e0ab92db1d25 100644 --- a/docs/reference/transform/limitations.asciidoc +++ b/docs/reference/transform/limitations.asciidoc @@ -22,6 +22,14 @@ categories: [[transform-config-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] [[transforms-ccs-limitation]] === {transforms-cap} support {ccs} if the remote cluster is configured properly