IPV4_NUM_TO_STRING
SinceVersion dev
IPV4_NUM_TO_STRING
description
Syntax
VARCHAR IPV4_NUM_TO_STRING(BIGINT ipv4_num)
接受一个类型为Int16、Int32、Int64 且大端表示的 IPv4 的地址,返回相应 IPv4 的字符串表现形式,格式为A.B.C.D(以点分割的十进制数字)。
notice
对于负数或超过4294967295 (即 '255.255.255.255')的入参都返回NULL,表示无效收入
example
mysql> select ipv4_num_to_string(3232235521);
+--------------------------------+
| ipv4_num_to_string(3232235521) |
+--------------------------------+
| 192.168.0.1 |
+--------------------------------+
1 row in set (0.01 sec)
mysql> select num,ipv4_num_to_string(num) from ipv4_bi;
+------------+---------------------------+
| num | ipv4_num_to_string(`num`) |
+------------+---------------------------+
| -1 | NULL |
| 0 | 0.0.0.0 |
| 2130706433 | 127.0.0.1 |
| 4294967295 | 255.255.255.255 |
| 4294967296 | NULL |
+------------+---------------------------+
7 rows in set (0.01 sec)
keywords
IPV4_NUM_TO_STRING, IP