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版本: 最新版本-3.5

url_extract_parameter

从 URL 的查询字符串中提取请求的 name 参数的值。参数提取的处理方式与 RFC 1866#section-8.2.1 中指定的方式相同。如果指定的参数名称不存在，则返回 NULL。

该函数从 v3.2 版本开始支持。

语法​

VARCHAR url_extract_parameter(VARCHAR str, VARCHAR name)

参数​

  • str: 要提取参数的 URL 字符串。
  • name: 查询字符串中参数的名称。

返回值​

返回 VARCHAR 值。

示例​

mysql> select url_extract_parameter("https://starrocks.io/doc?k1=10&k2=3&k1=100", "k1");
+---------------------------------------------------------------------------+
| url_extract_parameter('https://starrocks.io/doc?k1=10&k2=3&k1=100', 'k1') |
+---------------------------------------------------------------------------+
| 10                                                                        |
+---------------------------------------------------------------------------+

mysql> select url_extract_parameter('https://starrocks.com/doc?k0=10&k1=%21%23%24%26%27%28%29%2A%2B%2C%2F%3A%3B%3D%3F%40%5B%5D%20%22%25%2D%2E%3C%3E%5C%5E%5F%60%7B%7C%7D%7E&k2','k1');
+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| url_extract_parameter('https://starrocks.com/doc?k0=10&k1=%21%23%24%26%27%28%29%2A%2B%2C%2F%3A%3B%3D%3F%40%5B%5D%20%22%25%2D%2E%3C%3E%5C%5E%5F%60%7B%7C%7D%7E&k2', 'k1') |
+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| !#$&'()*+,/:;=?@[] "%-.<>\^_`{|}~                                                                                                                                        |
+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------+