contains function

The contains function indicates whether or not a search string is present inside the source string.
returnvalue contains(source, search_string)

source ::= any*
search_string ::= any*
returnvalue ::= boolean
Example: Fetch the full names of passengers who have "SFO" in their route.
SELECT fullname FROM baggageInfo bag 
WHERE EXISTS bag.bagInfo[contains($element.routing,"SFO")]
Output:
{"fullname":"Michelle Payne"}
{"fullname":"Lucinda Beckman"}
{"fullname":"Henry Jenkins"}
{"fullname":"Lorenzo Phil"}
{"fullname":"Gerard Greene"}