IPV6_STRING_TO_NUM_OR_NULL

SinceVersion dev

IPV6_STRING_TO_NUM_OR_NULL

description

Syntax

VARCHAR IPV6_STRING_TO_NUM_OR_NULL(VARCHAR ipv6_string)

IPv6NumToString 的反向函数，它接受一个 IP 地址字符串并返回二进制格式的 IPv6 地址。 如果输入字符串包含有效的 IPv4 地址，则返回其等效的 IPv6 地址。

notice

如果输入非法的IP地址，会返回NULL

example

1. mysql> select hex(ipv6_string_to_num_or_null('1111::ffff'));
2. +-----------------------------------------------+
3. | hex(ipv6_string_to_num_or_null('1111::ffff')) |
4. +-----------------------------------------------+
5. | 1111000000000000000000000000FFFF              |
6. +-----------------------------------------------+
7. 1 row in set (0.01 sec)

9. mysql> select hex(ipv6_string_to_num_or_null('192.168.0.1'));
10. +------------------------------------------------+
11. | hex(ipv6_string_to_num_or_null('192.168.0.1')) |
12. +------------------------------------------------+
13. | 00000000000000000000FFFFC0A80001               |
14. +------------------------------------------------+
15. 1 row in set (0.02 sec)

17. mysql> select hex(ipv6_string_to_num_or_null('notaaddress'));
18. +------------------------------------------------+
19. | hex(ipv6_string_to_num_or_null('notaaddress')) |
20. +------------------------------------------------+
21. | NULL                                           |
22. +------------------------------------------------+
23. 1 row in set (0.02 sec)

keywords

IPV6_STRING_TO_NUM_OR_NULL, IP