#6583 and #40206 added support for SELECT FOR UPDATE. There is additional syntax to support: SKIP LOCKED and NOWAIT. See an example of the syntax here: https://www.postgresql.org/docs/current/sql-select.html

Update, Feb 2021: CockroachDB v20.2 supports the NO WAIT syntax. SKIP LOCKED is still not supported at the time of this writing.

Epic CRDB-11976

Jira issue: CRDB-5535