Dynamic Columns Functions

Dynamic columns is a feature that allows one to store different sets of columns for each row in a table. It works by storing a set of columns in a blob and having a small set of functions to manipulate it.

Title Description
COLUMN_ADD Adds or updates dynamic columns.
COLUMN_CHECK Checks if a dynamic column blob is valid
COLUMN_CREATE Returns a dynamic columns blob.
COLUMN_DELETE Deletes a dynamic column.
COLUMN_EXISTS Checks is a column exists.
COLUMN_GET Gets a dynamic column value by name
COLUMN_JSON Returns a JSON representation of dynamic column blob data
COLUMN_LIST Returns comma-separated list of columns names.
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https://mariadb.com/kb/en/dynamic-columns-functions/