Mirror upstream elastic#133494 as single snapshot commit for AI review

BASE=37f65b0bf8eb0f75ea696ad136eac0bd50005330
HEAD=7572fc5993ae95ef569fd2283666951cb387ff78
Branch=main

Author: phananh1010

docs/reference/query-languages/esql/_snippets/functions/description/url_encode.md

@@ -2465,3 +2465,39 @@ warning:Line 2:9: java.lang.IllegalArgumentException: single-value function enco
     @timestamp:date     | message:text
 2023-10-23T13:55:01.544Z|Connected to 10.1.0.1
 ;
+
+url_encode sample for docs
+required_capability: url_encode
+
+// tag::url_encode[]
+ROW u = "https://www.example.com/papers?q=information+retrieval&year=2024&citations=high" | EVAL u = URL_ENCODE(u)
+// end::url_encode[]
+;
+
+// tag::url_encode-result[]
+u:keyword
+https%3A%2F%2Fwww.example.com%2Fpapers%3Fq%3Dinformation%2Bretrieval%26year%3D2024%26citations%3Dhigh
+// end::url_encode-result[]
+;
+
+url_encode mixed functions tests
+required_capability: url_encode
+
+FROM employees 
+| WHERE emp_no == 10001 
+| EVAL a = TRIM(URL_ENCODE(first_name))
+| EVAL b = URL_ENCODE(TO_LOWER(first_name))
+| KEEP a,b;
+
+a:keyword | b:keyword
+Georgi    | georgi 
+;
+
+url_encode mixed input tests
+required_capability: url_encode
+
+ROW u = ["hello elastic!", "a+b-c%d", "", "!#$&'()*+,/:;=?@[]"] | EVAL u = URL_ENCODE(u);
+
+u:keyword
+["hello+elastic%21", "a%2Bb-c%25d", "", "%21%23%24%26%27%28%29*%2B%2C%2F%3A%3B%3D%3F%40%5B%5D"]
+;