---

{ “title”: “PROTOCOL”, “language”: “en”, “description”: “The PROTOCOL function is mainly used to extract the protocol part from a URL string.” }

Description

The PROTOCOL function is mainly used to extract the protocol part from a URL string.

Syntax

PROTOCOL( <url> )

Parameters

Parameter	Description
<url>	The URL to be parsed

Return Value

Returns the protocol part of the . Special cases:

• If any of the parameters is NULL, NULL is returned.

Examples

SELECT protocol('https://doris.apache.org/');

+---------------------------------------+
| protocol('https://doris.apache.org/') |
+---------------------------------------+
| https                                 |
+---------------------------------------+

SELECT protocol(null);

+----------------+
| protocol(NULL) |
+----------------+
| NULL           |
+----------------+

相关命令

If you want to extract other parts of the URL, you can use parse_url。