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docs/alternator: list another unimplemented Alternator feature

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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 <nyh@scylladb.com>

Closes scylladb/scylladb#27183
This commit is contained in:
Nadav Har'El
2025-11-23 12:34:39 +02:00
committed by Botond Dénes
parent 943350fd35
commit f4555be8a5
1 changed files with 4 additions and 0 deletions
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docs/alternator/compatibility.md
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@@ -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.
<https://github.com/scylladb/scylladb/issues/21852>
* Alternator does not support multi-attribute (composite) keys in GSIs.
This feature was added to DynamoDB in November 2025.
<https://github.com/scylladb/scylladb/issues/27182>