IPV4_STRING_TO_NUM_OR_NULL

IPV4_STRING_TO_NUM_OR_NULL

Description

Syntax

BIGINT IPV4_STRING_TO_NUM_OR_NULL(VARCHAR ipv4_string)

BIGINT INET_ATON(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。该函数有一个别名为 INET_ATON。

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, INET_ATON, IP