information_schema.columns.generation_expression

mysql

type: LONGTEXT NOT NULL
5.7-8

mariadb

type: NULL
Note:
The expression used for computing the column value in a generated (virtual, or computed) column.
© 2022 MariaDB
5.1-10.8

tidb

type: TEXT NOT NULL
Note:
For generated columns, this value displays the expression used to calculate the column value. For non-generated columns, the value is empty.
© 2022 PingCAP
4-6.1

postgres

type: CHARACTER_DATA NULL
Note:
If the column is a generated column, then the generation expression, else null.
© 1996-2022 The PostgreSQL Global Development Group
12-15
Note:
Applies to a feature not available in PostgreSQL
© 1996-2022 The PostgreSQL Global Development Group
10-11
type: CHARACTER_DATA
Note:
Applies to a feature not available in PostgreSQL
© 1996-2022 The PostgreSQL Global Development Group
8.2-9.6

cockroachdb

type: unknown
Note:
The expression used for computing the column value in a computed column.
© 2022 CockroachDB
2-21.2

mssql