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TO ĬREATE CERTIFICATE ĮNCRYPTION BY PASSWORD = 'choose_a_password' that should be able to perform the TRUNCATE. 2) Grant EXECUTE on the Stored Procedure to the User(s) and/or Role(s) The following is the T-SQL that corresponds to the steps noted above: - 1) Create the Stored Procedure:ĬREATE PROCEDURE dbo.
#TRUNCATE TABLE SQL SERVER FULL#
Either way, you should retain full control over the scenarios in which the User can perform this action.įortunately, this is fairly simple to accomplish. Whether that is a loop that goes through all tables and executes TRUNCATE on each one (will reflect new and removed Tables might need a pattern specific for the Table name, perhaps?), OR is a list of accepted Tables to be truncated (won't reflect new and removed Tables, but maybe new Tables shouldn't be included anyway), is up to you. You want to create a Stored Procedure to contain only the specific actions that you feel are permissible. You want them to be able to TRUNCATE, but granting them ALTER to a Table will allow the User to add / remove / change Columns, etc. Granting ALTER on a Table or Schema allows that User to make any change they want. Sybase Supported by Adaptive Server Enterprise.ĭelete all rows from the department table.Please do not grant any permission to any User outside of EXECUTE on a particular Stored Procedure that will do what you are wanting. TRUNCATE_WITH_AUTO_COMMIT option Standards and compatibility If the table contains a column defined as DEFAULT AUTOINCREMENT or DEFAULT GLOBAL AUTOINCREMENT, TRUNCATE TABLE resets the next available value for the column. Do not use this statement in SQL Remote replication or on a MobiLink remote database. Individual deletions of rows are not entered into the transaction log, so the TRUNCATE TABLE operation is not replicated.
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If TRUNCATE_WITH_AUTO_COMMIT is set to ON, then a COMMIT is performed before and after the table is truncated. Side effectsĭelete triggers are not fired by the TRUNCATE TABLE statement. This means that any cursors that were previously opened and that reference the table being truncated must be closed and a COMMIT or ROLLBACK must be issued to release the reference to the table.įor temporary tables, each user has their own copy of the data, and exclusive access is not required. Must be the table owner, or have DBA authority, or have ALTER permissions on the table.įor base tables, the TRUNCATE TABLE statement requires exclusive access to the table, as the operation is atomic (either all rows are deleted, or none are). If a fast truncation is carried out, then a COMMIT is carried out before and after the operation. The TRUNCATE TABLE statement is not executed within an atomic statement.
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The TRUNCATE TABLE statement is not executed within a trigger. There are no foreign keys either to or from the table. If the TRUNCATE_WITH_AUTO_COMMIT option is set to ON (the default), and all the following criteria are satisfied, a fast form of table truncation is executed: Each deleted row is not entered into the transaction log.
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The TRUNCATE TABLE statement is entered into the transaction log as a single statement, like data definition statements. The column definitions and constraints remain intact, and triggers and permissions remain in effect. It is equivalent to a DELETE statement without a WHERE clause, except that no triggers are fired as a result of the TRUNCATE TABLE statement and each individual row deletion is not entered into the transaction log.Īfter a TRUNCATE TABLE statement, the table structure and all of the indexes continue to exist until you issue a DROP TABLE statement. The TRUNCATE TABLE statement deletes all rows from a table. Use this statement to delete all rows from a table, without deleting the table definition.