MEDIUMTEXT
Syntax
MEDIUMTEXT [CHARACTER SET charset_name] [COLLATE collation_name]
Description
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.
SYNONYMS
The following are synonyms for MEDIUMTEXT:
- LONG
- LONG CHAR VARYING
- LONG CHARACTER VARYING
- LONG VARCHAR
- LONG VARCHARACTER
EXAMPLES
MEDIUMTEXT
Example of MEDIUMTEXT:
CREATE TABLE mediumtext_example ( description VARCHAR(20), example MEDIUMTEXT ) DEFAULT CHARSET=latin1; -- One byte per char makes the examples clearer
INSERT 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 | +---------------------+----------+
Data Too Long
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 1
See Also
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