Distributed SQL Surface Area

SingleStore DB supports a large subset of the SQL surface area, with the following limitations:

• Reference tables must have explicit primary keys.
• An AUTO_INCREMENT column in a distributed table must be a BIGINT. Auto-increment values are monotonically increasing on each aggregator but not consecutive across the cluster.
• Sharded tables do not support unique keys (unless the unique key is a superset of the shard key).
• Sharded tables do not support UPDATE queries that modify the shard key.
• Sharded tables do not support UPDATE...LIMIT.

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