SQL Queries v25.4 known limitations #20811
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michae2
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Oct 29, 2025
| - Multi-column-family checks during updates are not supported under `READ COMMITTED` isolation. [#112488](https://github.com/cockroachdb/cockroach/issues/112488) | ||
| - Because locks acquired by [foreign key]({% link {{ page.version.version }}/foreign-key.md %}) checks, [`SELECT FOR UPDATE`]({% link {{ page.version.version }}/select-for-update.md %}), and [`SELECT FOR SHARE`]({% link {{ page.version.version }}/select-for-update.md %}) are fully replicated under `READ COMMITTED` isolation, some queries experience a delay for Raft replication. | ||
| - [Foreign key]({% link {{ page.version.version }}/foreign-key.md %}) checks are not performed in parallel under `READ COMMITTED` isolation. | ||
| - Mixed-isolation-level workloads must enable foreign-key check locking for `SERIALIZABLE` transactions to avoid race conditions. [#151663](https://github.com/cockroachdb/cockroach/issues/151663) |
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Would it be possible to link directly to this comment? cockroachdb/cockroach#151663 (comment)
I think it's a little more specific about the conditions and the locking required.
| ### Mixed-isolation workloads | ||
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| {% include {{ page.version.version }}/known-limitations/geospatial-heterogeneous-architectures.md %} | ||
| - Mixed-isolation-level workloads must enable foreign-key check locking for `SERIALIZABLE` transactions to avoid race conditions. [#151663](https://github.com/cockroachdb/cockroach/issues/151663) |
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Same comment here about linking directly to comment cockroachdb/cockroach#151663 (comment)
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