Distributed SQL Surface Area

SingleStore 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 contains all columns of the shard key).

• Sharded tables do not support UPDATE queries that modify the shard key.

• Sharded tables do not support UPDATE...LIMIT.