Method exists

nodedb/src/control/sequence/registry.rs:285–289

Check if a sequence exists.

(&self, tenant_id: u64, name: &str)

    /// Check if a sequence exists.
    pub fn exists(&self, tenant_id: u64, name: &str) -> bool {
        let key = registry_key(tenant_id, name);
        let map = self.sequences.read().unwrap_or_else(|p| p.into_inner());
        map.contains_key(&key)
    }

    /// Get a sequence definition (for SHOW SEQUENCES detail).
    pub fn get_def(&self, tenant_id: u64, name: &str) -> Option<StoredSequence> {