{
    "MIGRATE": {
        "summary": "Atomically transfers a key from one instance to another.",
        "complexity": "This command actually executes a DUMP+DEL in the source instance, and a RESTORE in the target instance. See the pages of these commands for time complexity. Also an O(N) data transfer between the two instances is performed.",
        "group": "generic",
        "since": "2.6.0",
        "arity": -6,
        "function": "migrateCommand",
        "get_keys_function": "migrateGetKeys",
        "history": [
            [
                "3.0.0",
                "Added the `COPY` and `REPLACE` options."
            ],
            [
                "3.0.6",
                "Added the `KEYS` option."
            ],
            [
                "4.0.7",
                "Added the `AUTH` option."
            ],
            [
                "6.0.0",
                "Added the `AUTH2` option."
            ]
        ],
        "command_flags": [
            "WRITE"
        ],
        "acl_categories": [
            "KEYSPACE",
            "DANGEROUS"
        ],
        "command_tips": [
            "NONDETERMINISTIC_OUTPUT"
        ],
        "key_specs": [
            {
                "flags": [
                    "RW",
                    "ACCESS",
                    "DELETE"
                ],
                "begin_search": {
                    "index": {
                        "pos": 3
                    }
                },
                "find_keys": {
                    "range": {
                        "lastkey": 0,
                        "step": 1,
                        "limit": 0
                    }
                }
            },
            {
                "flags": [
                    "RW",
                    "ACCESS",
                    "DELETE",
                    "INCOMPLETE"
                ],
                "begin_search": {
                    "keyword": {
                        "keyword": "KEYS",
                        "startfrom": -2
                    }
                },
                "find_keys": {
                    "range": {
                        "lastkey": -1,
                        "step": 1,
                        "limit": 0
                    }
                }
            }
        ],
        "reply_schema": {
            "oneOf": [
                {
                    "const": "OK",
                    "description": "Success."
                },
                {
                    "const": "NOKEY",
                    "description": "No keys were found in the source instance."
                }
            ]
        },
        "arguments": [
            {
                "name": "host",
                "type": "string"
            },
            {
                "name": "port",
                "type": "integer"
            },
            {
                "name": "key-selector",
                "type": "oneof",
                "arguments": [
                    {
                        "name": "key",
                        "type": "key",
                        "key_spec_index": 0
                    },
                    {
                        "name": "empty-string",
                        "type": "pure-token",
                        "token": "\"\""
                    }
                ]
            },
            {
                "name": "destination-db",
                "type": "integer"
            },
            {
                "name": "timeout",
                "type": "integer"
            },
            {
                "name": "copy",
                "token": "COPY",
                "type": "pure-token",
                "optional": true,
                "since": "3.0.0"
            },
            {
                "name": "replace",
                "token": "REPLACE",
                "type": "pure-token",
                "optional": true,
                "since": "3.0.0"
            },
            {
                "name": "authentication",
                "type": "oneof",
                "optional": true,
                "arguments": [
                    {
                        "token": "AUTH",
                        "name": "auth",
                        "display": "password",
                        "type": "string",
                        "since": "4.0.7"
                    },
                    {
                        "token": "AUTH2",
                        "name": "auth2",
                        "type": "block",
                        "since": "6.0.0",
                        "arguments": [
                            {
                                "name": "username",
                                "type": "string"
                            },
                            {
                                "name": "password",
                                "type": "string"
                            }
                        ]
                    }
                ]
            },
            {
                "token": "KEYS",
                "name": "keys",
                "display": "key",
                "type": "key",
                "key_spec_index": 1,
                "optional": true,
                "multiple": true,
                "since": "3.0.6"
            }
        ]
    }
}
