Description
Extract operating system major version from user agent string, based on ua_parser.
Syntax
OsMajor(user_agent_string)
Examples
OsMajor('Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_8) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.93 Safari/537.36') returns '10'
Return value datatype
string
Notes
Returns null if Os major version can't be extracted from string.
Impact of null value
If input is null, returns null.