MEDIUMTEXT [CHARACTER SET charset_name] [COLLATE collation_name]A TEXT column with a maximum length of 16,777,215 (224 - 1) characters. The effective maximum length is less if the value contains multi-byte characters. Each MEDIUMTEXT value is stored using
a three-byte length prefix that indicates the number of bytes in the value.
The following are synonyms for MEDIUMTEXT:
LONG
LONG CHAR VARYING
LONG CHARACTER VARYING
LONG VARCHAR
LONG VARCHARACTER
Example of MEDIUMTEXT:
CREATE TABLE mediumtext_example (
description VARCHAR(20),
example MEDIUMTEXT
) DEFAULT CHARSET=latin1; -- One byte per char makes the examples clearerINSERT INTO mediumtext_example VALUES
('Normal foo', 'foo'),
('Trailing spaces foo', 'foo '),
('NULLed', NULL),
('Empty', ''),
('Maximum', RPAD('', 16777215, 'x'));SELECT description, LENGTH(example) AS length
FROM mediumtext_example;+---------------------+----------+
| description | length |
+---------------------+----------+
| Normal foo | 3 |
| Trailing spaces foo | 9 |
| NULLed | NULL |
| Empty | 0 |
| Maximum | 16777215 |
+---------------------+----------+When SQL_MODE is strict (the default) a value is considered "too long" when its length exceeds the size of the data type, and an error is generated.
Example of data too long behavior for MEDIUMTEXT:
TRUNCATE mediumtext_example;
INSERT INTO mediumtext_example VALUES
('Overflow', RPAD('', 16777216, 'x'));ERROR 1406 (22001): Data too long for column 'example' at row 1This page is licensed: GPLv2, originally from fill_help_tables.sql