Unconference: OpenSearch is not a database!
summary
Argument: OpenSearch lacks no integrity enforcement and data independence, so schemas changing force app updates. Evidence: customers repeatedly hit join limits when migrating relational workloads, rejected a Flink-based flattening because it moves business logic; one product uses OpenSearch with PPL joins since 3.1 and five indexes under the covers to act like a database. Result: joins exist and are being optimized (planned 3.3), but treating OpenSearch as a drop-in relational DB remains risky.
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