@Test
public void test_2_exec() throws SQLException {
// Prepare data
TableInfo tableInfo = TableInfo.Single("grade");
Container constraintContainer = Container.And();
constraintContainer.add(Parameter.Constraint("grade", CompareType.LIKE, "A"));
// Perform action
MySQLDeleteHandler deleteHandler = new MySQLDeleteHandler(cushyDBConnection);
deleteHandler.Delete().From(tableInfo).Where(constraintContainer).execute();
// Check using JDBC
PreparedStatement preparedStatement =
databaseConnection.prepareStatement("SELECT COUNT(*) FROM GRADE WHERE GRADE LIKE ?");
preparedStatement.setString(1, "A");
ResultSet resultSet = preparedStatement.executeQuery();
if (resultSet.next()) {
int count = resultSet.getInt(1);
assertEquals(count, 0);
} else {
throw new AssertionError();
}
}
@Test
public void test_4_exec() throws SQLException {
// Prepare data
TableInfo tableInfo = TableInfo.Multi();
tableInfo.add("course", "c");
tableInfo.add("grade", "g");
Container constraintContainer = Container.And();
constraintContainer.add(Parameter.Constraint("c", "name", CompareType.LIKE, "course_1"));
constraintContainer.add(Join.Equals("c", "id", "g", "course_id"));
// Perform action
MySQLDeleteHandler deleteHandler = new MySQLDeleteHandler(cushyDBConnection);
deleteHandler.Delete("g").From(tableInfo).Where(constraintContainer).execute();
// Check using JDBC
PreparedStatement preparedStatement =
databaseConnection.prepareStatement(
"SELECT COUNT(*) FROM GRADE G, COURSE C WHERE C.NAME LIKE ? AND G.COURSE_ID = C.ID");
preparedStatement.setString(1, "course_1");
ResultSet resultSet = preparedStatement.executeQuery();
if (resultSet.next()) {
int count = resultSet.getInt(1);
assertEquals(count, 0);
} else {
throw new AssertionError();
}
}
@Test
public void test_1_sql() {
// Prepare data
TableInfo tableInfo = TableInfo.Single("table1");
Container constraintContainer = Container.And();
constraintContainer
.add(Parameter.Constraint("param1", CompareType.EQ, 11))
.add(Parameter.Constraint("param2", CompareType.LIKE, "12"))
.add(Parameter.Constraint("param3", CompareType.NEQ, 13));
// Perform action
MySQLDeleteHandler deleteHandler = new MySQLDeleteHandler(cushyDBConnection);
String sql = deleteHandler.Delete().From(tableInfo).Where(constraintContainer).sql();
// Check
assertEquals(
sql, "DELETE a FROM table1 a WHERE (a.param1 = ? AND a.param2 LIKE ? AND a.param3 <> ?)");
}
@Test(expected = CushyDBException.class) // Exception due to foreign key constraint
public void test_3_exec() throws SQLException {
// Prepare data
TableInfo tableInfo = TableInfo.Single("course");
Container constraintContainer = Container.And();
constraintContainer.add(Parameter.Constraint("name", CompareType.LIKE, "course_1"));
// Perform action
MySQLDeleteHandler deleteHandler = new MySQLDeleteHandler(cushyDBConnection);
deleteHandler.Delete().From(tableInfo).Where(constraintContainer).execute();
}