Mega Code Archive
Trap Both Primary Key and CHECK Constraint Violations
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8> CREATE TABLE T1(
9> pk_col int NOT NULL PRIMARY KEY CHECK (pk_col > 0),
10> ident_col int NOT NULL IDENTITY (1,1)
11> )
12>
13> DECLARE
14> @myerror AS int
15> INSERT INTO T1 VALUES(0) -- violate the check constraint
16> SET @myerror = @@ERROR
17> IF @myerror = 2627
18> PRINT 'PRIMARY KEY constraint violation'
19> ELSE IF @myerror = 547
20> PRINT 'CHECK constraint violation'
21> GO
Msg 547, Level 16, State 1, Server J\SQLEXPRESS, Line 15
The INSERT statement conflicted with the CHECK constraint "CK__T1__pk_col__39788055". The conflict occurred in database "master", table "dbo.T1", column 'pk_col'.
The statement has been terminated.
CHECK constraint violation
1>
2> --Attempt to Capture @@IDENTITY, @@ROWCOUNT, and @@ERROR
3> DECLARE
4> @myerror AS int,
5> @myrowcount AS int,
6> @myidentity AS int
7> INSERT INTO T1 VALUES(10) -- PK violation
8> SELECT @myidentity = @@IDENTITY,
9> @myrowcount = @@ROWCOUNT,
10> @myerror = @@ERROR
11> PRINT '@myidentity: ' + CAST(@myidentity AS varchar)
12> PRINT '@myrowcount: ' + CAST(@myrowcount AS varchar)
13> PRINT '@myerror : ' + CAST(@myerror AS varchar)
14> GO
(1 rows affected)
(1 rows affected)
@myidentity: 2
(1 rows affected)
@myrowcount: 1
(1 rows affected)
@myerror : 0
1> --Output of Successful Attempt to Capture @@IDENTITY, @@ROWCOUNT, and @@ERROR
2>
3> drop table T1;
4> GO
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