IPV4_STRING_TO_NUM_OR_NULL

SinceVersion dev

IPV4_STRING_TO_NUM_OR_NULL

description

Syntax

BIGINT IPV4_STRING_TO_NUM_OR_NULL(VARCHAR ipv4_string)

获取包含 IPv4 地址的字符串，格式为 A.B.C.D（点分隔的十进制数字）。返回一个 BIGINT 数字，表示相应的大端 IPv4 地址。

notice

如果输入字符串不是有效的 IPv4 地址，将返回NULL

example

1. mysql> select ipv4_string_to_num_or_null('192.168.0.1');
2. +-------------------------------------------+
3. | ipv4_string_to_num_or_null('192.168.0.1') |
4. +-------------------------------------------+
5. | 3232235521                                |
6. +-------------------------------------------+
7. 1 row in set (0.01 sec)

9. mysql> select str, ipv4_string_to_num_or_null(str) from ipv4_str;
10. +-----------------+---------------------------------+
11. |str              | ipv4_string_to_num_or_null(str) |
12. +-----------------+---------------------------------+
13. | 0.0.0.0         | 0                               |
14. | 127.0.0.1       | 2130706433                      |
15. | 255.255.255.255 | 4294967295                      |
16. | invalid         | NULL                            |
17. +-----------------+---------------------------------+
18. 4 rows in set (0.01 sec)

keywords

IPV4_STRING_TO_NUM_OR_NULL, IP