[Streams] Add array known limitation (elastic#3674)

mdbirnstiehl · web-flow · commit bd231958b30f · 2025-10-27T17:59:20.000Z
This PR closes elastic#3659 and documents limitations when working with arrays.
diff --git a/solutions/observability/streams/management/extract.md b/solutions/observability/streams/management/extract.md
@@ -185,3 +185,4 @@ You can still add your own processors manually to the `@custom` pipeline if need
 
 - Streams does not support all processors. More processors will be added in future versions.
 - The data preview simulation may not accurately reflect the changes to the existing data when editing existing processors or re-ordering them. Streams will allow proper simulations using original documents in a future version.
+- Streams can't properly handle arrays. While it supports basic actions like appending or renaming, it can't access individual array elements. For classic streams, the workaround is to use the [manual pipeline configuration](./extract/manual-pipeline-configuration.md) that supports Painless scripting and all ingest processors.

Original file line number	Diff line number	Diff line change
@@ -185,3 +185,4 @@ You can still add your own processors manually to the `@custom` pipeline if need
`185`	`185`
`186`	`186`	`- Streams does not support all processors. More processors will be added in future versions.`
`187`	`187`	`- The data preview simulation may not accurately reflect the changes to the existing data when editing existing processors or re-ordering them. Streams will allow proper simulations using original documents in a future version.`
	`188`	`+- Streams can't properly handle arrays. While it supports basic actions like appending or renaming, it can't access individual array elements. For classic streams, the workaround is to use the [manual pipeline configuration](./extract/manual-pipeline-configuration.md) that supports Painless scripting and all ingest processors.`