{
    "SUBSTR": {
        "summary": "Get a substring of the string stored at a key",
        "complexity": "O(N) where N is the length of the returned string. The complexity is ultimately determined by the returned length, but because creating a substring from an existing string is very cheap, it can be considered O(1) for small strings.",
        "group": "string",
        "since": "1.0.0",
        "arity": 4,
        "function": "getrangeCommand",
        "deprecated_since": "2.0.0",
        "replaced_by": "`GETRANGE`",
        "doc_flags": [
            "DEPRECATED"
        ],
        "command_flags": [
            "READONLY"
        ],
        "acl_categories": [
            "STRING"
        ],
        "key_specs": [
            {
                "flags": [
                    "RO",
                    "ACCESS"
                ],
                "begin_search": {
                    "index": {
                        "pos": 1
                    }
                },
                "find_keys": {
                    "range": {
                        "lastkey": 0,
                        "step": 1,
                        "limit": 0
                    }
                }
            }
        ],
        "arguments": [
            {
                "name": "key",
                "type": "key",
                "key_spec_index": 0
            },
            {
                "name": "start",
                "type": "integer"
            },
            {
                "name": "end",
                "type": "integer"
            }
        ]
    }
}
