IS_IPV4_STRING

IS_IPV4_STRING

Description

Syntax

BOOLEAN IS_IPV4_STRING(STRING ipv4_str)

接收一个表示形式为字符串的IPv4地址作为参数，如果为格式正确且合法的IPv4地址，返回true；反之，返回false。

Example

mysql> select is_ipv4_string(NULL);
+----------------------+
| is_ipv4_string(NULL) |
+----------------------+
|                 NULL |
+----------------------+
mysql> CREATE TABLE `test_is_ipv4_string` (
      `id` int,
      `ip_v4` string
    ) ENGINE=OLAP
    DISTRIBUTED BY HASH(`id`) BUCKETS 4
    PROPERTIES (
    "replication_allocation" = "tag.location.default: 1"
    );
mysql> insert into test_is_ipv4_string values(0, NULL), (1, '0.0.0.'), (2, ''), (3, '.'), (4, '255.255.255.255');
mysql> select id, is_ipv4_string(ip_v4) from test_is_ipv4_string order by id;
+------+-----------------------+
| id   | is_ipv4_string(ip_v4) |
+------+-----------------------+
|    0 |                  NULL |
|    1 |                     0 |
|    2 |                     0 |
|    3 |                     0 |
|    4 |                     1 |
+------+-----------------------+

Keywords

IS_IPV4_STRING, IP