belliottsmith commented on code in PR #4572: URL: https://github.com/apache/cassandra/pull/4572#discussion_r2731284877
########## doc/modules/cassandra/pages/developing/cql/transactions-examples.adoc: ########## @@ -0,0 +1,418 @@ += Accord Transaction Design Patterns +:page-nav-title: Transaction Patterns + +This page provides advanced design patterns for Accord transactions. These patterns solve common distributed system challenges that were difficult or impossible to address with eventual consistency. + +For basic syntax, getting started, and migration guides, see xref:developing/cql/transactions.adoc[Accord Transactions]. + +== Pattern: Synchronous Unique Constraints + +Cassandra's primary key enforces uniqueness, but what if you need uniqueness on a non-primary-key column like `email` or `username`? This pattern uses sidecar index tables to enforce multiple unique constraints atomically. Review Comment: is sidecar a useful word to use here? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
