BLOB

Overview

String for variable-length binary data up to 65,535 bytes.

See also: Data Types in 10.6 ES, in 10.5 ES, and in 10.4 ES

EXAMPLES

BLOB

Example of BLOB:

CREATE TABLE blob_example (
  description VARCHAR(20),
  example BLOB
) DEFAULT CHARSET=latin1; -- One byte per char makes the examples clearer
INSERT INTO blob_example VALUES
  ('Normal foo', 'foo'),
  ('Trailing spaces foo', 'foo      '),
  ('NULLed', NULL),
  ('Empty', ''),
  ('Maximum', RPAD('', 65535, CHAR(7)));
SELECT description, LENGTH(example) AS length
  FROM blob_example;
+---------------------+--------+
| description         | length |
+---------------------+--------+
| Normal foo          |      3 |
| Trailing spaces foo |      9 |
| NULLed              |   NULL |
| Empty               |      0 |
| Maximum             |  65535 |
+---------------------+--------+

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 BLOB:

TRUNCATE blob_example;

INSERT INTO blob_example VALUES
  ('Overflow', RPAD('', 65536, CHAR(7)));
ERROR 1406 (22001): Data too long for column 'example' at row 1

CHANGE HISTORY

Release Series

History

10.6 Enterprise

  • Present starting in MariaDB Enterprise Server 10.6.4-1.

10.5 Enterprise

  • Present starting in MariaDB Enterprise Server 10.5.3-1.

10.4 Enterprise

  • Present starting in MariaDB Enterprise Server 10.4.6-1.

EXTERNAL REFERENCES