IPV6_STRING_TO_NUM_OR_DEFAULT
IPV6_STRING_TO_NUM_OR_DEFAULT
IPV6_STRING_TO_NUM_OR_DEFAULT
description
Syntax
VARCHAR IPV6_STRING_TO_NUM_OR_DEFAULT(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0
example
mysql> select hex(ipv6_string_to_num_or_default('1111::ffff'));
+--------------------------------------------------+
| hex(ipv6_string_to_num_or_default('1111::ffff')) |
+--------------------------------------------------+
| 1111000000000000000000000000FFFF |
+--------------------------------------------------+
1 row in set (0.01 sec)
mysql> select hex(ipv6_string_to_num_or_default('192.168.0.1'));
+---------------------------------------------------+
| hex(ipv6_string_to_num_or_default('192.168.0.1')) |
+---------------------------------------------------+
| 00000000000000000000FFFFC0A80001 |
+---------------------------------------------------+
1 row in set (0.02 sec)
mysql> select hex(ipv6_string_to_num_or_default('notaaddress'));
+---------------------------------------------------+
| hex(ipv6_string_to_num_or_default('notaaddress')) |
+---------------------------------------------------+
| 00000000000000000000000000000000 |
+---------------------------------------------------+
1 row in set (0.02 sec)
keywords
IPV6_STRING_TO_NUM_OR_DEFAULT, IP
