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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | 1x 1x 1x 1x 4x 4x 4x 4x | import { Logger } from "../../../logger";
import { IRequest } from "../../../server/request";
import { Database } from "../../data/database";
import { DatabaseValue } from "../../data/database-value";
import { RedisToken } from "../../protocol/redis-token";
import { IRespCommand } from "../resp-command";
/**
* ### Available since 1.0.0.
* ### RENAME key newkey
*
* Renames key to newkey. It returns an error when key does not exist. If newkey already exists
* it is overwritten, when this happens RENAME executes an implicit DEL operation, so if the
* deleted key contains a very big value it may cause high latency even if RENAME itself is
* usually a constant-time operation.
* **NOTE: unit-redis-ness development does not track the timing of operations.**
*
* In Cluster mode, both key and newkey must be in the same hash slot, meaning that in practice
* only keys that have the same hash tag can be reliably renamed in cluster.
* **Also NOTE: There is no 'cluster mode' available for unit-redis-ness**
*
* ### History
* <= 3.2.0: Before Redis 3.2.0, an error is returned if source and destination names are the same.
*/
export class RenameCommand extends IRespCommand {
public maxParams = 2
public minParams = 2
public name = "rename"
private logger: Logger = new Logger(module.id);
public execSync(request: IRequest, db: Database): RedisToken {
this.logger.debug(
`${request.getCommand()}.execute(%s)`,
...request.getParams()
);
const oldKey: string = request.getParam(0),
newKey: string = request.getParam(1),
dbValue: DatabaseValue = db.get(oldKey);
if (!dbValue) {
this.logger.debug(`key ${oldKey} does not exist`);
return RedisToken.error("ERR no such key");
}
db.rename(
oldKey,
newKey
);
this.logger.debug(`${request.getCommand()}.execute name set to ${newKey}`);
return RedisToken.responseOk();
}
}
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