REVOKE

Class

SQL Applications

Purpose

Revoke access privileges for users to tables.

Syntax

REVOKE ALL | [SELECT [(<column> [,...])]] [UPDATE [(<column> [,...])]]

[INSERT] [DELETE] [ALTER] [READ ONLY [(<column> [,...])]

ON [<database>!]<table> FROM '<user>,<group>' [,...] | PUBLIC

See Also

ALTER TABLE, CREATE TABLE, GETENV(), GRANT, SET TCACHE

Description

To revoke access privileges for users to tables. The REVOKE statement can only remove existing user privileges given with the GRANT statement. To revoke privileges you must be the owner of the table or have already been granted ALTER privileges.

Keywords	Description
ALL	All privileges are revoked.
SELECT	The ability to name any column in a SELECT statement. The privilege can be restricted to one or more columns by listing them.
UPDATE	The ability to name any column in an UPDATE statement. The privilege can be restricted to one or more columns by listing them.
INSERT	The ability to INSERT rows into the table.
DELETE	The ability to DELETE rows from the table.
ALTER	The data type to be stored in that column, and the applicable length or precision.
READ ONLY	The ability to read from any column in a SELECT statement. The privilege can be restricted to one or more columns by listing them.
database	The name of the database to which the table belongs. Databases in Recital are implemented as directories containing files that correspond to the tables and associated files in the database. Operating System file protection can be applied individually to the files for added security. The directory is a sub-directory of the Recital data directory. The environment variable / symbol DB_DATADIR points to the current Recital data directory and can be queried using the GETENV() function. Files from other directories can be added to the database using the ADD TABLE command or via the database catalog and SET AUTOCATALOG functionality. The '!' character must be included between the database name and the table name.
table	The name of the table from which to revoke the privileges.
user	The user access control string that will be revoked from the privilege. User access control strings are defined by the operating system.
group	The group access control string that will be revoked the privilege. Group access control strings are defined by the operating system.
PUBLIC	All users and groups will be revoked privileges

Example

// Revoke update privilege for columns lastname and firstname and insert on the table
EXEC SQL
REVOKE UPDATE (lastname, firstname) INSERT
  ON customer
  FROM '[20,100]';
 
// Grant all privileges to all users
EXEC SQL
REVOKE ALL
  ON test
  FROM PUBLIC;

Products

Recital Database Server, Recital Mirage Server, Recital Terminal Developer