Clickhouse: Clickhouse assume table constraint - #2467
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LucaCappelletti94
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Aug 31, 2026
| pub struct AssumeConstraint { | ||
| /// Optional constraint name. | ||
| pub name: Option<Ident>, | ||
| /// The boolean expression the ASSUME constraint enforces. |
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ClickHouse's ASSUME is an optimizer assertion that is not enforced and may produce incorrect results when false. Not a constraint, when false it may start doing 2+2=3. It is just an optimization hint as far as I can recall, not an enforced rule.
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Yes, updated with a more accurate comment
Co-authored-by: Luca Cappelletti <cappelletti.luca94@gmail.com>
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Resolves: #2466
First time contributing so please let me know if I missed anything!