IPV4_STRING_TO_NUM_OR_DEFAULT

IPV4_STRING_TO_NUM_OR_DEFAULT

Description

Syntax

BIGINT IPV4_STRING_TO_NUM_OR_DEFAULT(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 地址或者 NULL，将返回 0

Example

  1. mysql> select ipv4_string_to_num_or_default('192.168.0.1'); 
  2. +----------------------------------------------+ 
  3. | ipv4_string_to_num_or_default('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_default(str) from ipv4_str; 
  10. +-----------------+------------------------------------+ 
  11. |str              | ipv4_string_to_num_or_default(str) | 
  12. +-----------------+------------------------------------+ 
  13. | 0.0.0.0         | 0                                  | 
  14. | 127.0.0.1       | 2130706433                         | 
  15. | 255.255.255.255 | 4294967295                         | 
  16. | invalid         | 0                                  | 
  17. +-----------------+------------------------------------+ 
  18. 4 rows in set (0.01 sec)
  20. mysql> select addr_src, ipv4_string_to_num_or_default(addr_src) from ipv4_string_test where addr_src is null;
  21. +----------+-----------------------------------------+
  22. | addr_src | ipv4_string_to_num_or_default(addr_src) |
  23. +----------+-----------------------------------------+
  24. | NULL     |                                       0 |
  25. +----------+-----------------------------------------+
  26. 1 row in set (0.09 sec)

Keywords

IPV4_STRING_TO_NUM_OR_DEFAULT, IP