CHAR_LENGTH()

Description

The CHAR_LENGTH function returns the length of the string str, measured in code points. A multibyte character counts as a single code point. This means that, for a string containing two 3-byte characters, CHAR_LENGTH returns 6, whereas CHAR_LENGTH returns 2.

Syntax

> CHAR_LENGTH(str)

note

The alias for CHAR_LENGTH can also be lengthUTF8()

Arguments

Examples

> drop table if exists t1;
> create table t1(a varchar(255),b varchar(255));
> insert into t1 values('nihao','你好');
> select char_length(a), char_length(b) from t1;
+---------------+---------------+
| lengthutf8(a) | lengthutf8(b) |
+---------------+---------------+
|             5 |             2 |
+---------------+---------------+