{ "GETSET": { "summary": "Returns the previous string value of a key after setting it to a new value.", "complexity": "O(1)", "group": "string", "since": "1.0.0", "arity": 3, "function": "getsetCommand", "deprecated_since": "6.2.0", "replaced_by": "`SET` with the `!GET` argument", "doc_flags": [ "DEPRECATED" ], "command_flags": [ "WRITE", "DENYOOM", "FAST" ], "acl_categories": [ "STRING" ], "key_specs": [ { "flags": [ "RW", "ACCESS", "UPDATE" ], "begin_search": { "index": { "pos": 1 } }, "find_keys": { "range": { "lastkey": 0, "step": 1, "limit": 0 } } } ], "reply_schema": { "oneOf": [ { "description": "The old value stored at the key.", "type": "string" }, { "description": "The key does not exist.", "type": "null" } ] }, "arguments": [ { "name": "key", "type": "key", "key_spec_index": 0 }, { "name": "value", "type": "string" } ] } }