Function validate_unique_keys_generic

datafusion/functions-nested/src/map.rs:169–187

(array: &dyn Array)

}

fn validate_unique_keys_generic(array: &dyn Array) -> Result<()> {
    let mut seen_keys = HashSet::with_capacity(array.len());

    for i in 0..array.len() {
        let key = ScalarValue::try_from_array(array, i)?;

        // Validation 1: Map keys cannot be null
        if key.is_null() {
            return exec_err!("map key cannot be null");
        }

        // Validation 2: Map keys must be unique
        if seen_keys.contains(&key) {
            return exec_err!("map key must be unique, duplicate key found: {}", key);
        }
        seen_keys.insert(key);
    }
    Ok(())
}

/// Validates that map keys are non-null and unique.
fn validate_map_keys(array: &dyn Array) -> Result<()> {