From f4555be8a5de1bda2bb7cdcb6cef47a9319d51d1 Mon Sep 17 00:00:00 2001 From: Nadav Har'El Date: Sun, 23 Nov 2025 12:34:39 +0200 Subject: [PATCH] docs/alternator: list another unimplemented Alternator feature A new feature was announced this week for Amazon DynamoDB, "multi- attribute composite keys in global secondary indexes", which allows to create GSIs with composite keys (multiple columns). This feature already existed in CQL's materialized views, but didn't exist in DynamoDB until now. So this patch adds a paragraph to our docs/alternator/compatibility.md mentioning that we don't support this DynamoDB feature yet. See also issue #27182 which we opened to track this unimplemented feature. Signed-off-by: Nadav Har'El Closes scylladb/scylladb#27183 --- docs/alternator/compatibility.md | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/docs/alternator/compatibility.md b/docs/alternator/compatibility.md index a5e7be3d8c..a6206bbabf 100644 --- a/docs/alternator/compatibility.md +++ b/docs/alternator/compatibility.md @@ -428,3 +428,7 @@ they should be easy to detect. Here is a list of these unimplemented features: that can be used to achieve consistent reads on global (multi-region) tables. This table option was added as a preview to DynamoDB in December 2024. + +* Alternator does not support multi-attribute (composite) keys in GSIs. + This feature was added to DynamoDB in November 2025. +