CAST
description
Syntax
cast (input as type)BIGINT type
Syntax(BIGINT)
cast (input as BIGINT)
将 input 转成 指定的 type
将当前列 input 转换为 BIGINT 类型
example
- 转常量，或表中某列
mysql> select cast (1 as BIGINT);
+-------------------+
| CAST(1 AS BIGINT) |
+-------------------+
| 1 |
+-------------------+- 转导入的原始数据
curl --location-trusted -u root: -T ~/user_data/bigint -H "columns: tmp_k1, k1=cast(tmp_k1 as BIGINT)" http://host:port/api/test/bigint/_stream_load注：在导入中，由于原始类型均为String，将值为浮点的原始数据做 cast的时候数据会被转换成 NULL ，比如 12.0 。Doris目前不会对原始数据做截断。
如果想强制将这种类型的原始数据 cast to int 的话。请看下面写法：
curl --location-trusted -u root: -T ~/user_data/bigint -H "columns: tmp_k1, k1=cast(cast(tmp_k1 as DOUBLE) as BIGINT)" http://host:port/api/test/bigint/_stream_load
mysql> select cast(cast ("11.2" as double) as bigint);
+----------------------------------------+
| CAST(CAST('11.2' AS DOUBLE) AS BIGINT) |
+----------------------------------------+
| 11 |
+----------------------------------------+
1 row in set (0.00 sec)keywords
CAST