MySQL 5.7 Reference Manual Including MySQL NDB Cluster 7.5 and NDB Cluster 7.6
The COLUMN_PRIVILEGES table provides
information about column privileges. It takes its values from the
mysql.columns_priv system table.
The COLUMN_PRIVILEGES table has these
columns:
GRANTEE
The name of the account to which the privilege is granted, in
'
format.
user_name'@'host_name'
TABLE_CATALOG
The name of the catalog to which the table containing the
column belongs. This value is always def.
TABLE_SCHEMA
The name of the schema (database) to which the table containing the column belongs.
TABLE_NAME
The name of the table containing the column.
COLUMN_NAME
The name of the column.
PRIVILEGE_TYPE
The privilege granted. The value can be any privilege that can be granted at the column level; see Section 13.7.1.4, “GRANT Statement”. Each row lists a single privilege, so there is one row per column privilege held by the grantee.
In the output from
SHOW FULL
COLUMNS, the privileges are all in one column and in
lowercase, for example,
select,insert,update,references. In
COLUMN_PRIVILEGES, there is one
privilege per row, in uppercase.
IS_GRANTABLE
YES if the user has the
GRANT OPTION privilege,
NO otherwise. The output does not list
GRANT OPTION as a separate row
with PRIVILEGE_TYPE='GRANT OPTION'.
COLUMN_PRIVILEGES is a
nonstandard INFORMATION_SCHEMA table.
The following statements are not equivalent:
SELECT ... FROM INFORMATION_SCHEMA.COLUMN_PRIVILEGES SHOW GRANTS ...