COLUMN_DELETE()

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Overview

Removes the specified dynamic column.

CREATE TABLE t1 (b TINYBLOB);

INSERT INTO t1 VALUES (COLUMN_CREATE('Column1','val1'));

INSERT INTO t1 VALUES (COLUMN_CREATE('Column2','val2'));

SELECT COLUMN_JSON(b) FROM t1;

+--------------------+
| COLUMN_JSON(b)     |
+--------------------+
| {"Column1":"val1"} |
| {"Column2":"val2"} |
+--------------------+

UPDATE t1 SET b = COLUMN_DELETE(b,'Column2');

SELECT COLUMN_JSON(b) FROM t1;

+--------------------+
| COLUMN_JSON(b)     |
+--------------------+
| {"Column1":"val1"} |
| {}                 |
+--------------------+

Release Series	History
11.4 Enterprise	Present starting in MariaDB Enterprise Server 11.4.3-1.
10.6 Enterprise	Present starting in MariaDB Enterprise Server 10.6.4-1.
10.6 Community	Present starting in MariaDB Community Server 10.6.0.
10.5 Enterprise	Present starting in MariaDB Enterprise Server 10.5.3-1.
10.5 Community	Present starting in MariaDB Community Server 10.5.0.
10.4 Enterprise	Present starting in MariaDB Enterprise Server 10.4.6-1.
10.4 Community	Present starting in MariaDB Community Server 10.4.0.
10.3 Enterprise	Present starting in MariaDB Enterprise Server 10.3.16-1.
10.3 Community	Present starting in MariaDB Community Server 10.3.0.
10.2 Enterprise	Present starting in MariaDB Enterprise Server 10.2.25-1.
10.2 Community	Present starting in MariaDB Community Server 10.2.0.

Release Series	History
11.4 Enterprise	Present starting in MariaDB Enterprise Server 11.4.3-1.
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.

Additional information on this topic may be found in the MariaDB Public Knowledge Base.