CAST

CAST

Description

Syntax

T cast (input as Type)

Converts input to the specified type

example

1. Turn constant, or a column in a table

mysql> select cast (1 as BIGINT);
+-------------------+
| CAST(1 AS BIGINT) |
+-------------------+
|                 1 |
+-------------------+

2. Transferred raw data

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

• Note: In the import, because the original type is String, when the original data with floating point value is cast, the data will be converted to NULL, such as 12.0. Doris is currently not truncating raw data. *

If you want to force this type of raw data cast to int. Look at the following words:

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