The Dynamic columns feature was introduced in MariaDB 5.3.
COLUMN_LIST(dyncol_blob);
Since MariaDB 10.0.1, this function returns a comma-separated list of column names. The names are quoted with backticks.
Before MariaDB 10.0.1, it returned a comma-separated list of column numbers, not names.
See dynamic columns for more information.
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https://mariadb.com/kb/en/column_list/