trim
Description
Removes consecutive spaces or specified characters from the beginning and end of the str argument. Removing specified characters are supported from StarRocks 2.5.0.
Syntax
VARCHAR trim(VARCHAR str[, VARCHAR characters])
Parameters
str: required, the string to trim, which must evaluate to a VARCHAR value.
characters: optional, the characters to remove, which must be a VARCHAR value. If this parameter is not specified, spaces are removed from the string by default. If this parameter is set to an empty string, an error is returned.
Return value
Returns a VARCHAR value.
Examples
Example 1: Remove the five spaces from the beginning and end of the string.
MySQL > SELECT trim(" ab c ");
+-------------------+
| trim(' ab c ') |
+-------------------+
| ab c |
+-------------------+
1 row in set (0.00 sec)
Example 2: Remove specified characters from the beginning and end of the string.
MySQL > SELECT trim("abcd", "ad");
+--------------------+
| trim('abcd', 'ad') |
+--------------------+
| bc |
+--------------------+
MySQL > SELECT trim("xxabcdxx", "x");
+-----------------------+
| trim('xxabcdxx', 'x') |
+-----------------------+
| abcd |
+-----------------------+