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[DOCS] Adds limitation on deprecated painless scripts and edits limitation regarding spaces in Transform docs (#86397)

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Co-authored-by: Lisa Cawley <lcawley@elastic.co>
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István Zoltán Szabó 2022-05-05 13:31:16 +02:00 • committed by GitHub
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docs/reference/transform/limitations.asciidoc
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@ -57,7 +57,18 @@ in {transforms}:
* {transforms-cap} cannot optimize queries when you use scripts for all the
groupings defined in `group_by`, you will receive a warning message when you
use scripts this way.
[discrete]
[[transform-painless-warning-limitation]]
=== Deprecation warnings for Painless scripts in {transforms}
If a {transform} contains Painless scripts that use deprecated syntax,
deprecation warnings are displayed when the {transform} is previewed or started.
However, it is not possible to check for deprecation warnings across all
{transforms} as a bulk action because running the required queries might be a
resource intensive process. Therefore any deprecation warnings due to deprecated
Painless syntax are not available in the Upgrade Assistant.
[discrete]
[[transform-runtime-field-limitation]]
=== {transforms-cap} perform better on indexed fields
@ -277,8 +288,11 @@ documents if your {transform} contains a `group_by` based on `date_histogram`.
{kibana-ref}/xpack-spaces.html[Spaces] enable you to organize your source and
destination indices and other saved objects in {kib} and to see only the objects
that belong to your space. However, this limited scope does not apply to
{transforms}; they are visible in all spaces.
that belong to your space. However, a {transform} is a long running task which
is managed on cluster level and therefore not limited in scope to certain
spaces. Space awareness can be implemented for a {data-source} under
**Stack Management > Kibana** which allows privileges to the {transform}
destination index.
[discrete]
[[transform-kibana-limitations]]