JSON.STRLEN
Syntax
JSON.STRLEN key [path]
- Available in:
- Redis Stack / JSON 1.0.0
- Time complexity:
- O(1) when path is evaluated to a single value, O(N) when path is evaluated to multiple values, where N is the size of the key
Report the length of the JSON String at path in key
Required arguments
key
is key to parse.
Optional arguments
path
is JSONPath to specify. Default is root $, if not provided. Returns null if the key or path do not exist.
Return
JSON.STRLEN returns by recursive descent an array of integer replies for each path, the array's length, or nil, if the matching JSON value is not a string.
For more information about replies, see Redis serialization protocol specification.
Examples
redis> JSON.SET doc $ '{"a":"foo", "nested": {"a": "hello"}, "nested2": {"a": 31}}'
OK
redis> JSON.STRLEN doc $..a
1) (integer) 3
2) (integer) 5
3) (nil)