delete.out

derby database source code.good for you.

ij> --
-- this test is for basic delete functionality
--
-- create the table
create table t1 (c1 int);
0 rows inserted/updated/deleted
ij> create table t2 (c1 int);
0 rows inserted/updated/deleted
ij> -- negative tests
-- table name required for positioned delete and for searched delete
delete;
ERROR 42X01: Syntax error: Encountered "<EOF>" at line 4, column 6.
ij> -- populate the table
insert into t1 values (1);
1 row inserted/updated/deleted
ij> insert into t2 select * from t1;
1 row inserted/updated/deleted
ij> -- delete all the rows (only 1)
select * from t1;
C1         
-----------
1          
ij> delete from t1;
1 row inserted/updated/deleted
ij> select * from t1;
C1         
-----------
ij> -- repopulate the table
insert into t1 values(2);
1 row inserted/updated/deleted
ij> insert into t1 values(3);
1 row inserted/updated/deleted
ij> -- delete all the rows (multiple rows)
select * from t1;
C1         
-----------
2          
3          
ij> delete from t1;
2 rows inserted/updated/deleted
ij> select * from t1;
C1         
-----------
ij> -- test atomicity of multi row deletes
create table atom_test (c1 smallint);
0 rows inserted/updated/deleted
ij> insert into atom_test values 1, 30000,0, 2;
4 rows inserted/updated/deleted
ij> -- overflow
delete from atom_test where c1 + c1 > 0;
ERROR 22003: The resulting value is outside the range for the data type SMALLINT.
ij> select * from atom_test;
C1    
------
1     
30000 
0     
2     
ij> -- divide by 0
delete from atom_test where c1 / c1 = 1;
ERROR 22012: Attempt to divide by zero.
ij> select * from atom_test;
C1    
------
1     
30000 
0     
2     
ij> -- target table in source, should be done in deferred mode
-- repopulate the tables
insert into t1 values(1);
1 row inserted/updated/deleted
ij> insert into t1 values(2);
1 row inserted/updated/deleted
ij> insert into t2 select * from t1;
2 rows inserted/updated/deleted
ij> autocommit off;
ij> select * from t1;
C1         
-----------
1          
2          
ij> delete from t1 where c1 <=
	(select t1.c1
	 from t1, t2
	 where t1.c1 = t2.c1
	 and t1.c1 = 2);
2 rows inserted/updated/deleted
ij> select * from t1;
C1         
-----------
ij> rollback;
ij> delete from t1 where c1 >=
	(select
		(select c1
		 from t1
		 where c1 = 1)
	 from t2
	 where c1 = 2);
2 rows inserted/updated/deleted
ij> select * from t1;
C1         
-----------
ij> rollback;
ij> delete from t1 where c1 >=
	(select
		(select c1
		 from t1 a
		 where c1 = 1)
	 from t2
	 where c1 = 2);
2 rows inserted/updated/deleted
ij> select * from t1;
C1         
-----------
ij> rollback;
ij> -- delete 0 rows - degenerate case for deferred delete
delete from t1 where c1 =
	(select 1
	 from t2
	 where 1 =
		(select c1
		 from t1
		 where c1 = 2)
	);
0 rows inserted/updated/deleted
ij> select * from t1;
C1         
-----------
1          
2          
ij> rollback;
ij> -- delete 1 row
delete from t1
where c1 =
	(select c1
	 from t1
	 where c1 = 2)
and c1 = 2;
1 row inserted/updated/deleted
ij> select * from t1;
C1         
-----------
1          
ij> rollback;
ij> delete from t1 where c1 <=
	(select c1
	 from
		(select c1
		 from t1) a
	 where c1 = 2);
2 rows inserted/updated/deleted
ij> select * from t1;
C1         
-----------
ij> rollback;
ij> delete from t1 where c1 <=
	(select c1
	 from t2
	 where c1 = 37
	union
	 select c1
	 from t1
	 where c1 = 2);
2 rows inserted/updated/deleted
ij> select * from t1;
C1         
-----------
ij> rollback;
ij> delete from t1 where c1 <=
	(select c1
	 from t2
	 where c1 = 37
	union
	 select c1
	 from
		(select c1
		from t1) a
	 where c1 = 2);
2 rows inserted/updated/deleted
ij> select * from t1;
C1         
-----------
ij> rollback;
ij> autocommit on;
ij> -- drop the table
drop table t1;
0 rows inserted/updated/deleted
ij> drop table t2;
0 rows inserted/updated/deleted
ij> drop table atom_test;
0 rows inserted/updated/deleted
ij> --
-- here we test extra state lying around in the
-- deleteResultSet on a prepared statement that
-- is executed multiple times.  if we don't
-- get a nasty error then we are ok
--
create table x (x int, y int);
0 rows inserted/updated/deleted
ij> create index ix on x(x);
0 rows inserted/updated/deleted
ij> insert into x values (1,1),(2,2),(3,3);
3 rows inserted/updated/deleted
ij> autocommit off;
ij> prepare p as 'delete from x where x = ? and y = ?';
ij> execute p using 'values (1,1)';
1 row inserted/updated/deleted
ij> execute p using 'values (2,2)';
1 row inserted/updated/deleted
ij> commit;
ij> -- clean up
autocommit on;
ij> drop table x;
0 rows inserted/updated/deleted
ij>