use-db-constraint

Constraint references, kinds, metadata, check labels, status, and deferrability.

This crate is part of the use-database facade workspace. It provides small, engine-neutral vocabulary types and metadata containers. It does not connect to databases, execute queries, run migrations, parse SQL, or model engine-specific behavior.

Example

use use_db_constraint::CheckExpressionLabel;

let label = CheckExpressionLabel::new("positive balance").expect("valid label");
assert_eq!(label.as_str(), "positive balance");