[API reference](https://evolu.dev/docs/api-reference) › [@evolu/sqlite-wasm](https://evolu.dev/docs/api-reference/sqlite-wasm) › [c-api](https://evolu.dev/docs/api-reference/sqlite-wasm/c-api) › sqlite3\_uri\_key

```ts
function sqlite3_uri_key(
  deps: SqliteWasmDep,
): (z: SqliteFilenamePtr, N: number) => 0 | CStringPtr;
```

Defined in: [packages/sqlite-wasm/src/CApi.ts:2983](https://github.com/evoluhq/evolu/blob/bc4578a260dd15d5bbf94b83765ca05984d194cb/packages/sqlite-wasm/src/CApi.ts#L2983)

Returns the name of a filename's N-th URI query parameter, counting from 0,
or NULL when N is out of range.

Wasm type `i(ii)`. Signature `["sqlite3_uri_key", "string",
"sqlite3_filename", "int"]` from SQLite's table.

See https://sqlite.org/c3ref/uri_boolean.html.