> ## Documentation Index
> Fetch the complete documentation index at: https://supaschema.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# fingerprint

> Print the canonical model equality hash for one schema source.

Use `fingerprint` when you need a fast equality check for a schema source.

Matching fingerprints mean the modeled schema objects are equal, ignoring SQL formatting and comments.

## Use this when

* A script needs a compact drift signal.
* You want to compare a tree and database after deploy.
* Two schema spellings should normalize to the same model.
* Debugging requires the model hash only.

## Run it

```bash theme={null}
npx supaschema fingerprint --from dir:database/schemas
npx supaschema fingerprint --from "database:$DATABASE_URL"
```

Compare two sources in a shell:

```bash theme={null}
[ "$(npx supaschema fingerprint --from dir:database/schemas)" = \
  "$(npx supaschema fingerprint --from "database:$DATABASE_URL")" ] \
  && echo "in sync" || echo "drift detected"
```

## Flags

<ParamField path="--from" type="source">
  Required schema source to fingerprint.
</ParamField>

## Exit codes

| Code | Meaning                                   |
| ---- | ----------------------------------------- |
| `0`  | Fingerprint printed                       |
| `1`  | Runtime failure                           |
| `2`  | Extraction diagnostics contained an error |

## Related

<CardGroup cols={2}>
  <Card title="Inspect" icon="scan-search" href="/docs/commands/inspect">
    Print the model that produced the hash.
  </Card>

  <Card title="Verify" icon="repeat-2" href="/docs/commands/verify">
    Compare fingerprints after apply-twice verification.
  </Card>

  <Card title="Diff" icon="file-diff" href="/docs/commands/diff">
    Render operations when fingerprints differ.
  </Card>

  <Card title="Sources" icon="database" href="/docs/concepts/sources">
    Choose source formats for comparisons.
  </Card>
</CardGroup>