LENGTHB

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MariaDB starting with 10.3.1

Introduced in MariaDB 10.3.1 as part of the Oracle compatibility enhancements.

Syntax

LENGTHB(str)

Description

LENGTHB() returns the length of the given string, in bytes. When Oracle mode is not set, this is a synonym for LENGTH.

A multi-byte character counts as multiple bytes. This means that for a string containing five two-byte characters, LENGTHB() returns 10, whereas CHAR_LENGTH() returns 5.

If str is not a string value, it is converted into a string. If str is NULL, the function returns NULL.

Examples

When Oracle mode from MariaDB 10.3 is not set:

SELECT CHAR_LENGTH('π'), LENGTH('π'), LENGTHB('π'), OCTET_LENGTH('π');
+-------------------+--------------+---------------+--------------------+
| CHAR_LENGTH('π')  | LENGTH('π')  | LENGTHB('π')  | OCTET_LENGTH('π')  |
+-------------------+--------------+---------------+--------------------+
|                 1 |            2 |             2 |                  2 |
+-------------------+--------------+---------------+--------------------+

In Oracle mode from MariaDB 10.3:

SELECT CHAR_LENGTH('π'), LENGTH('π'), LENGTHB('π'), OCTET_LENGTH('π');
+-------------------+--------------+---------------+--------------------+
| CHAR_LENGTH('π')  | LENGTH('π')  | LENGTHB('π')  | OCTET_LENGTH('π')  |
+-------------------+--------------+---------------+--------------------+
|                 1 |            1 |             2 |                  2 |
+-------------------+--------------+---------------+--------------------+

See Also

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