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RockStream v1.0 Known Limitations

The following architectural and SQL limitations are documented for the RockStream v1.0 release:

1. Single-Region Cluster Boundary

RockStream v1.0 is engineered and release-qualified for single-region deployments. Cross-region active-active replication and multi-region quorum consensus are not supported in v1.0.

2. Retraction-Producing Temporal Filters

Temporal sliding-window queries with dynamic wall-clock predicates (e.g. WHERE occurred_at > NOW() - INTERVAL '1 hour') that require proactive timer-driven retractions without incoming records are not supported in Core SQL and are scheduled for post-v1 releases.

3. Quarantined Third-Party Sinks

Kafka source and PostgreSQL CDC source are Core. The Kafka sink is Experimental: its runtime view adapter emits snapshot/change envelopes up to 900 KiB and reads retained view logs up to 64 MiB. SQL sink wiring, chunked snapshots, and automatic log compaction are unsupported. Legacy or unmaintained third-party connectors are rejected at admission with RS-4017.

4. Key Type Restrictions in Specific Non-Equi Joins

Floating-point join keys and complex nested structured keys in full outer joins are restricted to prevent IEEE-754 precision mismatches in incremental delta state indexes.