ALTER TABLE failed because trigger ‘%.*ls’ does not belong to table ‘%.*ls’.

Error Message:
Msg 4921, Level 16, State 0, Line 2
ALTER TABLE failed because trigger ‘%.*ls’ does not belong to table ‘%.*ls’.

Severity level:
16.

Description:
This error message appears when you try to perform an action (enable, disable, etc) for a trigger via an ALTER TABLE statement, but the trigger does not belong to that table.

Consequences:
The T-SQL statement can be parsed, but causes the error at runtime.

Resolution:
Errors of the Severity Level 16 are generated by the user and can be fixed by the SQL Server user. The statement cannot be executed this way. The trigger must exist and belong to that table.

Versions:
This error message was introduced with SQL Server 2005.

Example(s):
IF OBJECT_ID (‘dbo.t’) IS NOT NULL
    DROP TABLE dbo.t;
GO
CREATE TABLE dbo.t
(
    c1 int
);

IF OBJECT_ID (‘dbo.t1′) IS NOT NULL
    DROP TABLE dbo.t1;
GO
CREATE TABLE dbo.t1
(
    c1 int
);
GO
CREATE TRIGGER dbo.t1_i ON dbo.t1
FOR INSERT
AS
SELECT 1;
GO

ALTER TABLE dbo.t
    DISABLE TRIGGER t1_i

Remarks:
In the above example we try to disable t1_i on table dbo.t. Because this trigger belongs to table dbo.t1, the error is raised.



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