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
mysql> select ipv4_string_to_num_or_default('192.168.0.1');
+----------------------------------------------+
| ipv4_string_to_num_or_default('192.168.0.1') |
+----------------------------------------------+
| 3232235521 |
+----------------------------------------------+
1 row in set (0.01 sec)
mysql> select str, ipv4_string_to_num_or_default(str) from ipv4_str;
+-----------------+------------------------------------+
|str | ipv4_string_to_num_or_default(str) |
+-----------------+------------------------------------+
| 0.0.0.0 | 0 |
| 127.0.0.1 | 2130706433 |
| 255.255.255.255 | 4294967295 |
| invalid | 0 |
+-----------------+------------------------------------+
4 rows in set (0.01 sec)
mysql> select addr_src, ipv4_string_to_num_or_default(addr_src) from ipv4_string_test where addr_src is null;
+----------+-----------------------------------------+
| addr_src | ipv4_string_to_num_or_default(addr_src) |
+----------+-----------------------------------------+
| NULL | 0 |
+----------+-----------------------------------------+
1 row in set (0.09 sec)Keywords
IPV4_STRING_TO_NUM_OR_DEFAULT, IP