IPV6_STRING_TO_NUM_OR_NULL
IPV6_STRING_TO_NUM_OR_NULL
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
mysql> select hex(ipv6_string_to_num_or_null('1111::ffff'));
+-----------------------------------------------+
| hex(ipv6_string_to_num_or_null('1111::ffff')) |
+-----------------------------------------------+
| 1111000000000000000000000000FFFF |
+-----------------------------------------------+
1 row in set (0.01 sec)
mysql> select hex(ipv6_string_to_num_or_null('192.168.0.1'));
+------------------------------------------------+
| hex(ipv6_string_to_num_or_null('192.168.0.1')) |
+------------------------------------------------+
| 00000000000000000000FFFFC0A80001 |
+------------------------------------------------+
1 row in set (0.02 sec)
mysql> select hex(ipv6_string_to_num_or_null('notaaddress'));
+------------------------------------------------+
| hex(ipv6_string_to_num_or_null('notaaddress')) |
+------------------------------------------------+
| NULL |
+------------------------------------------------+
1 row in set (0.02 sec)
keywords
IPV6_STRING_TO_NUM_OR_NULL, IP
