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# Table: `dhcp_leases` |
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Stores observed DHCP lease/reservation data. |
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## Columns |
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| Column | Type | Null | Default | Notes | |
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|--------|------|------|---------|-------| |
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| `lease_key` | `TEXT` | no | none | Stable lease observation key. Primary key. | |
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| `worker_id` | `TEXT` | no | none | Collector worker. References `data_workers(worker_id)`. | |
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| `host_fqdn` | `TEXT` | yes | `NULL` | Matched host if known. References `hosts(fqdn)`. | |
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| `observed_name` | `TEXT` | no | `''` | Name reported by DHCP. | |
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| `ip_address` | `TEXT` | no | none | Observed IP address. | |
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| `mac_address` | `TEXT` | no | `''` | Observed MAC address. | |
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| `lease_state` | `TEXT` | no | `''` | DHCP state, if known. | |
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| `first_seen` | `TEXT` | no | none | First observation timestamp. | |
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| `last_seen` | `TEXT` | no | none | Last observation timestamp. | |
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| `raw` | `TEXT` | no | `''` | Raw source payload or diagnostic text. | |
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## Keys And Indexes |
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- Primary key: `lease_key` |
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- `idx_dhcp_leases_ip` on `ip_address` |
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- `idx_dhcp_leases_mac` on `mac_address` |
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- `idx_dhcp_leases_worker_last_seen` on `(worker_id, last_seen)` |
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## Relationships |
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- `worker_id` references `data_workers(worker_id)` with `ON UPDATE CASCADE ON DELETE RESTRICT` |
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- `host_fqdn` references `hosts(fqdn)` with `ON UPDATE CASCADE ON DELETE SET NULL` |
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## Definition |
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```sql |
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CREATE TABLE IF NOT EXISTS dhcp_leases ( |
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lease_key TEXT PRIMARY KEY, |
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worker_id TEXT NOT NULL, |
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host_fqdn TEXT, |
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observed_name TEXT NOT NULL DEFAULT '', |
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ip_address TEXT NOT NULL, |
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mac_address TEXT NOT NULL DEFAULT '', |
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lease_state TEXT NOT NULL DEFAULT '', |
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first_seen TEXT NOT NULL, |
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last_seen TEXT NOT NULL, |
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raw TEXT NOT NULL DEFAULT '', |
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FOREIGN KEY (worker_id) REFERENCES data_workers(worker_id) ON UPDATE CASCADE ON DELETE RESTRICT, |
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FOREIGN KEY (host_fqdn) REFERENCES hosts(fqdn) ON UPDATE CASCADE ON DELETE SET NULL |
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); |
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CREATE INDEX IF NOT EXISTS idx_dhcp_leases_ip ON dhcp_leases(ip_address); |
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CREATE INDEX IF NOT EXISTS idx_dhcp_leases_mac ON dhcp_leases(mac_address); |
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CREATE INDEX IF NOT EXISTS idx_dhcp_leases_worker_last_seen |
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ON dhcp_leases(worker_id, last_seen); |
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``` |