`information_schema.columns.column_type`

mysql

type: LONGTEXT NOT NULL

5.7-8

mariadb

type: NULL

Note:

Column definition, a MySQL and MariaDB extension.

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5.1-10.8

type: LONGTEXT NOT NULL

Note:

Column definition, a MySQL and MariaDB extension.

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10.2-10.7

tidb

type: TEXT NULL

Note:

The column type.

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4-6.1

postgres

cockroachdb

mssql