static void attributeMean() {
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
con = DriverManager.getConnection("jdbc:odbc:jbdb", "system", "tiger");
Statement meanQuery = con.createStatement();
ResultSet mean = meanQuery.executeQuery("select AVG(sal) from employ where sal IS NOT NULL");
if (mean.next()) {
fill = con.createStatement();
fill.executeUpdate("UPDATE employ set sal = COALESCE(sal," + mean.getInt(1) + ")");
}
/*fill = con.createStatement();
fill.executeUpdate("UPDATE employ set sal = COALESCE(sal,AVG(sal))");*/
st = con.createStatement();
rs = st.executeQuery("select * from employ");
System.out.println("Sno\tName\tSalary\tGPF\tGrade");
while (rs.next()) {
System.out.println(
">>"
+ rs.getString(1)
+ "\t"
+ rs.getString(2)
+ "\t"
+ rs.getString(3)
+ "\t"
+ rs.getString(4)
+ "\t"
+ rs.getString(5));
}
} catch (Exception e) {
System.out.println("Error: " + e);
}
}
/**
* Tests the implementation of getCharacterStream(long pos, long length).
*
* @throws Exception
*/
public void testGetCharacterStreamLong() throws Exception {
String str1 = "This is a test String. This is a test String";
Reader r1 = new java.io.StringReader(str1);
PreparedStatement ps = prepareStatement("insert into BLOBCLOB(ID, CLOBDATA) values(?,?)");
int id = BlobClobTestSetup.getID();
ps.setInt(1, id);
ps.setCharacterStream(2, r1);
ps.execute();
ps.close();
Statement st = createStatement();
ResultSet rs = st.executeQuery("select CLOBDATA from " + "BLOBCLOB where ID=" + id);
rs.next();
Clob clob = rs.getClob(1);
Reader r_1 = clob.getCharacterStream(2L, 5L);
String str2 = str1.substring(1, 6);
Reader r_2 = new java.io.StringReader(str2);
assertEquals(r_2, r_1);
rs.close();
st.close();
}
/**
* Remove a student from a particular course. Also Deletes all the quiz vizualisation files in the
* student's directory which relates to the course. Caution: vizualisation file will be deleted
* eventhough it also relates to another course if the student is also registered to that course.
* (FIX ME!) Throws InvalidDBRequestException if the student is not registered in the course,
* error occured during deletion, or other exception occured.
*
* @param username student's user name
* @param courseID course id (course number + instructor name)
* @throws InvalidDBRequestException
*/
public void deleteStudent(String username, String courseID) throws InvalidDBRequestException {
try {
Class.forName(GaigsServer.DBDRIVER);
db =
DriverManager.getConnection(GaigsServer.DBURL, GaigsServer.DBLOGIN, GaigsServer.DBPASSWD);
Statement stmt = db.createStatement();
ResultSet rs;
int count = 0;
// check if student registered to the course
rs =
stmt.executeQuery(
"select * from courseRoster where course_id = '"
+ courseID
+ "' and user_login = '******'");
if (!rs.next())
throw new InvalidDBRequestException("Student is not registered to the course");
// remove student from the course
count =
stmt.executeUpdate(
"delete from courseRoster where course_id = '"
+ courseID
+ "' and user_login = '******'");
if (count != 1) throw new InvalidDBRequestException("Error occured during deletion!");
// delete the quiz visualization files
rs =
stmt.executeQuery(
"select distinct unique_id, s.test_name from scores s, courseTest t "
+ "where s.test_name = t.test_name "
+ "and course_id = '"
+ courseID
+ "' "
+ "and user_login = '******'");
while (rs.next()) {
deleteVisualization(rs.getString(1), username, rs.getString(2));
count =
stmt.executeUpdate("delete from scores where unique_id = " + rs.getString(1).trim());
}
rs.close();
stmt.close();
db.close();
} catch (SQLException e) {
System.err.println("Invalid SQL in addstudent: " + e.getMessage());
throw new InvalidDBRequestException("???");
} catch (ClassNotFoundException e) {
System.err.println("Driver Not Loaded");
throw new InvalidDBRequestException("Internal Server Error");
}
}
public void updateOptionPrice(
String modelName, String optionSetName, String optionName, float newPrice) {
try {
int autoid = 0;
String sql = "select id from automobile where name ='" + modelName + "';";
ResultSet rs = statement.executeQuery(sql);
while (rs.next()) {
autoid = rs.getInt("id"); // get auto_id
}
int opsid = 0;
sql =
"select id from optionset where name ='"
+ optionSetName
+ "' and auto_id= "
+ autoid
+ ";";
rs = statement.executeQuery(sql);
while (rs.next()) {
opsid = rs.getInt("id"); // get option_id
}
sql =
"update options set price = "
+ newPrice
+ " where name= '"
+ optionName
+ "' and option_id= "
+ opsid
+ ";";
statement.executeUpdate(sql); // update it with name and option_id
} catch (SQLException e) {
e.printStackTrace();
}
}
public void deleteOption(String modelName, String optionSetName, String option) {
try {
int autoid = 0;
String sql = "select id from automobile where name ='" + modelName + "';";
ResultSet rs;
rs = statement.executeQuery(sql);
while (rs.next()) {
autoid = rs.getInt("id"); // get auto_id
}
int opsid = 0;
sql =
"select id from optionset where name ='"
+ optionSetName
+ "' and auto_id= "
+ autoid
+ ";";
rs = statement.executeQuery(sql);
while (rs.next()) {
opsid = rs.getInt("id"); // get option_id
}
sql = "delete from options where name= '" + option + "' and option_id= " + opsid;
statement.executeUpdate(sql); // delete it using name and option_id
} catch (SQLException e) {
e.printStackTrace();
}
}
public void actionPerformed(ActionEvent ae) {
try {
if (ae.getSource() == b7) {
rs = st.executeQuery("select count(*) from employeemaster");
if (rs.next()) {
t6.setText(rs.getString(1));
}
rs = st.executeQuery("select * from Head");
if (rs.next()) {
t1.setText(rs.getString(1));
t2.setText(rs.getString(2));
t7.setText(rs.getString(3));
t4.setText(rs.getString(4));
t5.setText(rs.getString(5));
t3.setText(rs.getString(6));
}
} else if (ae.getSource() == b6) {
dispose();
}
} catch (Exception e) {
JOptionPane.showMessageDialog(this, "Error is" + e);
}
}
static void probableValue() {
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
con = DriverManager.getConnection("jdbc:odbc:jbdb", "system", "tiger");
Statement freqQuery = con.createStatement();
ResultSet freq =
freqQuery.executeQuery(
"select sal,count(*) as total from employ group by sal order by total desc");
if (freq.next()) {
fill = con.createStatement();
fill.executeUpdate("UPDATE employ set sal = COALESCE(sal," + freq.getInt(1) + ")");
}
st = con.createStatement();
rs = st.executeQuery("select * from employ");
System.out.println(">>Sno\tName\tSalary\tGPF\tGrade");
while (rs.next()) {
System.out.println(
">>"
+ rs.getString(1)
+ "\t"
+ rs.getString(2)
+ "\t"
+ rs.getString(3)
+ "\t"
+ rs.getString(4)
+ "\t"
+ rs.getString(5));
}
} catch (Exception e) {
System.out.println("Error: " + e);
}
}
/** private method which actually will do all of our work for the sample */
private void executeSample() {
String query = "select anEmployee from staff2";
try {
Statement stmt = _con.createStatement();
;
// Execute the query which will return an Employee object
// We will cast this using the Person interface. Note the
// Person interface class MUST be in your CLASSPATH. You
// Do not need Employee in your CLASSPATH.
ResultSet rs = stmt.executeQuery(query);
output("***Using interface class\n");
while (rs.next()) {
Person aPerson = (Person) rs.getObject(1);
displayMethods(aPerson.getClass());
output(
"The person is: "
+ aPerson.toString()
+ "\nFirst Name= "
+ aPerson.getFirstName()
+ "\nLast Name= "
+ aPerson.getLastName()
+ "\n");
}
// Now execute the same query, but this time we will use
// reflection to access the class. Again, only the interface
// Person is required in the CLASSPATH
rs = stmt.executeQuery(query);
output("***Using reflection\n");
Object theObj = null;
while (rs.next()) {
theObj = rs.getObject(1);
output("The person is: " + theObj.toString() + "\n");
Class theClass = theObj.getClass();
displayMethods(theClass);
Method m1 = theClass.getMethod("toString", new Class[0]);
Method m2 = theClass.getMethod("getFirstName", new Class[0]);
Method m3 = theClass.getMethod("getLastName", new Class[0]);
output(
"The person is: "
+ (Object) m1.invoke(theObj, new Object[0])
+ "\nFirst Name= "
+ (Object) m2.invoke(theObj, new Object[0])
+ "\nLast Name= "
+ (Object) m3.invoke(theObj, new Object[0])
+ "\n");
}
rs.close();
stmt.close();
} catch (SQLException sqe) {
displaySQLEx(sqe);
} catch (Exception e) {
error("Unexpected exception : " + e.toString() + "\n");
e.printStackTrace();
}
}
/**
* Obtains information on a quiz that a student has taken, which includes the student's answer to
* the quiz, a unique id of the instance, number of questions in the quiz, number of questions
* answered correctly, and vizualisation type of the quiz. Throws InvalidDBRequestException if
* cannot find the record of the stuent taking the quiz, quiz is not registered in the database,
* or if any error occured to the database connection.
*
* @param student student's user name
* @param quiz quiz name
* @param startTime the time the student started the quiz
* @return a string tokenizer containing: answer,uniqueID, numQuestions, numCorrect, and
* visualType. It uses "@" as the delimiter.
* @throws InvalidDBRequestException
*/
public StringTokenizer getAnswerAndVisualType(String student, String quiz, String startTime)
throws InvalidDBRequestException {
String answer;
String uniqueID;
String numQuestions;
String numCorrect;
String visualType;
try {
Connection db;
Class.forName(GaigsServer.DBDRIVER);
db =
DriverManager.getConnection(GaigsServer.DBURL, GaigsServer.DBLOGIN, GaigsServer.DBPASSWD);
Statement stmt = db.createStatement();
ResultSet rs;
// get student's answer, unique id, number of questions, and number of questions answered
// correctly
rs =
stmt.executeQuery(
"select transcript, unique_id, num_questions, num_correct from scores "
+ "where test_name = '"
+ quiz
+ "' and user_login = '******' and start_time = '"
+ startTime
+ "'");
if (!rs.next()) throw new InvalidDBRequestException("Student has not taken the quiz");
else {
answer = rs.getString(1).trim();
uniqueID = rs.getString(2).trim();
numQuestions = rs.getString(3).trim();
numCorrect = rs.getString(4).trim();
}
// get quiz vizualisation type
rs = stmt.executeQuery("select visual_type from test where name = '" + quiz + "' ");
if (!rs.next())
throw new InvalidDBRequestException(
"Quiz was not found! Can't retrieve visualization type.");
else {
visualType = rs.getString(1);
}
rs.close();
stmt.close();
db.close();
} catch (SQLException e) {
System.err.println("Invalid SQL in getAnswerAndVisualType: " + e.getMessage());
throw new InvalidDBRequestException("???");
} catch (ClassNotFoundException e) {
System.err.println("Driver Not Loaded");
throw new InvalidDBRequestException("Internal Server Error");
}
return new StringTokenizer(
answer + "@" + uniqueID + "@" + numQuestions + "@" + numCorrect + "@" + visualType, "@");
}
/**
* Query a quiz list from the database. If there is no student user name specified, the list will
* contain all quizzes that are used in the instructor's courses. Otherwise, the list will contain
* all quizzes that the student has taken and from the instructor's courses which the student is
* registered. Throws InvalidDBRequestException if any error occured to the database connection.
*
* @param instructor instructor's user name
* @param student student's user name. Can be empty to get a list of all quizzes in the
* instructor's courses.
* @return a vector containing the list of quizzes
* @throws InvalidDBRequestException
*/
public Vector getQuizList(String instructor, String student) throws InvalidDBRequestException {
Vector list = new Vector();
try {
Connection db;
Class.forName(GaigsServer.DBDRIVER);
db =
DriverManager.getConnection(GaigsServer.DBURL, GaigsServer.DBLOGIN, GaigsServer.DBPASSWD);
Statement stmt = db.createStatement();
ResultSet rs;
if (!student.equals("")) {
// get the list that contains all quizzes that the student has taken and from the
// instructor's courses which the student is registered
rs =
stmt.executeQuery(
"select courseTest.test_name, scores.start_time from scores, courseTest, course "
+ "where courseTest.test_name = scores.test_name "
+ "and courseTest.course_id = course.course_id "
+ "and instructor = '"
+ instructor
+ "' and user_login = '******' "
+ "order by scores.start_time");
while (rs.next()) {
list.add(rs.getString(1) + " <" + rs.getString(2) + ">");
}
} else {
// get the list that contains all quizzes that are used in the instructor's courses
rs =
stmt.executeQuery(
"select test_name from courseTest, course "
+ "where courseTest.course_id = course.course_id "
+ "and instructor = '"
+ instructor
+ "' ");
while (rs.next()) {
list.add(rs.getString(1));
}
}
rs.close();
stmt.close();
db.close();
} catch (SQLException e) {
System.err.println("Invalid SQL in getQuizList: " + e.getMessage());
throw new InvalidDBRequestException("???");
} catch (ClassNotFoundException e) {
System.err.println("Driver Not Loaded");
throw new InvalidDBRequestException("Internal Server Error");
}
return list;
}
public ExptLocatorTree(Genome g) {
super();
try {
java.sql.Connection c = DatabaseFactory.getConnection(ExptLocator.dbRole);
int species = g.getSpeciesDBID();
int genome = g.getDBID();
Statement s = c.createStatement();
ResultSet rs = null;
rs =
s.executeQuery(
"select e.name, e.version from experiment e, exptToGenome eg where e.active=1 and "
+ "e.id=eg.experiment and eg.genome="
+ genome);
while (rs.next()) {
String name = rs.getString(1);
String version = rs.getString(2);
ChipChipLocator loc = new ChipChipLocator(g, name, version);
this.addElement(loc.getTreeAddr(), loc);
}
rs.close();
rs =
s.executeQuery(
"select ra.name, ra.version from rosettaanalysis ra, rosettaToGenome rg where "
+ "ra.id = rg.analysis and ra.active=1 and rg.genome="
+ genome);
while (rs.next()) {
String name = rs.getString(1);
String version = rs.getString(2);
MSPLocator msp = new MSPLocator(g, name, version);
this.addElement(msp.getTreeAddr(), msp);
}
rs.close();
rs =
s.executeQuery(
"select ra.name, ra.version from bayesanalysis ra, bayesToGenome rg where "
+ "ra.id = rg.analysis and ra.active=1 and rg.genome="
+ genome);
while (rs.next()) {
String name2 = rs.getString(1);
String version2 = rs.getString(2);
ExptLocator loc2 = new BayesLocator(g, name2, version2);
addElement(loc2.getTreeAddr(), loc2);
}
rs.close();
s.close();
DatabaseFactory.freeConnection(c);
} catch (SQLException se) {
se.printStackTrace(System.err);
throw new RuntimeException(se);
} catch (UnknownRoleException e) {
e.printStackTrace();
}
}
/*
* addAuto method. parse the Automobile object and add them to three tables.
*/
public void addAuto(Automobile auto) {
String name = null;
float price = 0;
int autoid = 0;
String sql = null;
try {
String autoName = auto.getMake() + " " + auto.getModel();
price = auto.getBasePrice();
sql =
"insert into automobile (name, base_price) values('"
+ autoName
+ "',"
+ price
+ ")"; // MySQL command
statement.executeUpdate(sql); // add to automobile table
sql = "select id from automobile where name ='" + autoName + "';";
ResultSet rs = statement.executeQuery(sql); // use ResultSet object to receive
while (rs.next()) {
autoid = rs.getInt("id"); // get auto_id
}
for (int i = 0; i < auto.getOptionSetNum(); i++) {
name = auto.getOptionSetName(i);
sql = "insert into optionset (name, auto_id) values('" + name + "'," + autoid + ")";
statement.executeUpdate(sql); // add to optionset table
int opsid = 0;
sql = "select id from optionset where name ='" + name + "';";
ResultSet rrs = statement.executeQuery(sql);
while (rrs.next()) {
opsid = rrs.getInt("id"); // get optionset id
}
for (int j = 0; j < auto.getOptionNum(i); j++) {
name = auto.getOptionName(i, j);
price = auto.getOptionPrice(i, j);
sql =
"insert into options (name, price, option_id) values('"
+ name
+ "',"
+ price
+ ","
+ opsid
+ ")";
statement.executeUpdate(sql); // add to options table
}
}
} catch (SQLException e) {
e.printStackTrace();
}
}
public static void duration() {
connectDb();
String sql = "select min(time), max(time), count(*) from " + tablename + ";";
try {
ResultSet rs = query.executeQuery(sql);
rs.next();
int numCols = rs.getMetaData().getColumnCount();
String minTime = rs.getString(1);
String maxTime = rs.getString(2);
String numPackets = rs.getString(3);
System.out.println(
"Experiment "
+ tablename
+ "\n\tfrom: "
+ minTime
+ "\n\tto: "
+ maxTime
+ "\n\tpackets: "
+ numPackets);
} catch (SQLException e) {
System.out.println("SQL Exception: " + e);
System.exit(1);
}
}
/**
* This method queries the database to get the sequence for the BP_ID.
*
* @exception SQLException, if query fails
* @author
*/
public String getBpid() {
String query;
String bpid = "";
Statement stmt = null;
ResultSet rs = null;
query = "select bp_id_seq.nextval from dual ";
try {
stmt = conn.createStatement();
rs = stmt.executeQuery(query);
if (rs.next()) {
bpid = rs.getString(1);
}
if (rs != null) rs.close();
if (stmt != null) stmt.close();
} catch (SQLException ex) {
USFEnv.getLog().writeCrit("Dinvjrnl: Sequence Value for BP_ID not Retreived ", this, ex);
try {
if (rs != null) rs.close();
if (stmt != null) stmt.close();
} catch (SQLException e) {
USFEnv.getLog().writeCrit("Unable to close the resultset/statement", this, e);
}
}
return bpid;
}
private static void addCourse(Connection conn, String stu_no) throws SQLException {
String cno = readEntry("Course number : ");
String sno = readEntry("Section number : ");
String course_query =
"SELECT Section_identifier FROM SECTION WHERE Section_identifier="
+ sno
+ " AND Course_number='"
+ cno
+ "' AND Semester='Spring' AND YEAR=TO_DATE('2007','YYYY')";
// System.out.println(course_query);
Statement s1 = conn.createStatement();
ResultSet r1 = s1.executeQuery(course_query);
if (r1.next()) {
String addc =
"INSERT INTO GRADE_REPORT (Student_number, Section_identifier, Grade) VALUES ("
+ stu_no
+ ", "
+ sno
+ ", 'NULL')";
Statement s2 = conn.createStatement();
System.out.println(addc);
try {
s2.executeUpdate(addc);
System.out.println("Enrollment successfull");
} catch (SQLException e) {
System.out.println("Cannot add course into table");
}
} else {
System.out.println("Course not found");
}
s1.close();
}
private static void dropCourse(Connection conn, String stu_no) throws SQLException {
String cno = readEntry("Course number: ");
String sno = readEntry("Section number : ");
String chks =
"SELECT g.Section_identifier FROM SECTION s, GRADE_REPORT g where s.Section_identifier=g.Section_identifier AND s.Course_number='"
+ cno
+ "' AND g.Section_identifier="
+ sno
+ " AND s.Semester='Spring' AND s.Year=TO_DATE('2007','YYYY') AND g.Student_number="
+ stu_no;
Statement s3 = conn.createStatement();
ResultSet r3 = s3.executeQuery(chks);
if (r3.next()) {
String del =
"DELETE FROM GRADE_REPORT WHERE Student_number="
+ stu_no
+ " AND Section_identifier="
+ sno;
Statement s4 = conn.createStatement();
try {
s4.executeUpdate(del);
System.out.println("Course dropped");
} catch (SQLException e) {
System.out.println("Cannot drop a course from table");
}
} else {
System.out.println("Enrollment data not found. Check the input and try again.");
}
}
private synchronized void init() throws SQLException {
if (isClosed) return;
// do tables exists?
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery(TABLE_NAMES_SELECT_STMT);
ArrayList<String> missingTables = new ArrayList(TABLES.keySet());
while (rs.next()) {
String tableName = rs.getString("name");
missingTables.remove(tableName);
}
for (String missingTable : missingTables) {
try {
Statement createStmt = conn.createStatement();
// System.out.println("Adding table "+ missingTable);
createStmt.executeUpdate(TABLES.get(missingTable));
createStmt.close();
} catch (Exception e) {
System.err.println(e.getClass().getName() + ": " + e.getMessage());
}
}
}
public static void customStartAll(Connection conn) throws SQLException {
String method = "customStartAll";
int location = 1000;
try {
Statement stmt = conn.createStatement();
int id = 0;
int gpfdistPort = 0;
String strSQL = "SELECT id\n";
strSQL += "FROM os.custom_sql";
ResultSet rs = stmt.executeQuery(strSQL);
while (rs.next()) {
id = rs.getInt(1);
gpfdistPort = GpfdistRunner.customStart(OSProperties.osHome);
strSQL = "INSERT INTO os.ao_custom_sql\n";
strSQL +=
"(id, table_name, columns, column_datatypes, sql_text, source_type, source_server_name, source_instance_name, source_port, source_database_name, source_user_name, source_pass, gpfdist_port)\n";
strSQL +=
"SELECT id, table_name, columns, column_datatypes, sql_text, source_type, source_server_name, source_instance_name, source_port, source_database_name, source_user_name, source_pass, "
+ gpfdistPort
+ "\n";
strSQL += "FROM os.custom_sql\n";
strSQL += "WHERE id = " + id;
stmt.executeUpdate(strSQL);
}
} catch (SQLException ex) {
throw new SQLException(
"(" + myclass + ":" + method + ":" + location + ":" + ex.getMessage() + ")");
}
}
public static String getVariable(Connection conn, String name) throws SQLException {
String method = "getVariable";
int location = 1000;
try {
location = 2000;
String value = "";
location = 2100;
Statement stmt = conn.createStatement();
String strSQL = "SELECT os.fn_get_variable('" + name + "')";
if (debug) Logger.printMsg("Getting Variable: " + strSQL);
location = 2200;
ResultSet rs = stmt.executeQuery(strSQL);
while (rs.next()) {
value = rs.getString(1);
}
location = 2300;
return value;
} catch (SQLException ex) {
throw new SQLException(
"(" + myclass + ":" + method + ":" + location + ":" + ex.getMessage() + ")");
}
}
public static String getVersion(Connection conn) throws SQLException {
String method = "getVersion";
int location = 1000;
try {
location = 2000;
String value = "";
location = 2100;
Statement stmt = conn.createStatement();
String strSQL =
"SELECT CASE "
+ "WHEN POSITION ('HAWQ 2.0.1' in version) > 0 THEN 'HAWQ_2_0_1' "
+ "WHEN POSITION ('HAWQ 2.0.0' in version) > 0 THEN 'HAWQ_2_0_0' "
+ "WHEN POSITION ('HAWQ 1' in version) > 0 THEN 'HAWQ_1' "
+ "WHEN POSITION ('HAWQ' in version) = 0 AND POSITION ('Greenplum Database' IN version) > 0 THEN 'GPDB' "
+ "ELSE 'OTHER' END "
+ "FROM version()";
if (debug) Logger.printMsg("Getting Variable: " + strSQL);
location = 2200;
ResultSet rs = stmt.executeQuery(strSQL);
while (rs.next()) {
value = rs.getString(1);
}
location = 2300;
return value;
} catch (SQLException ex) {
throw new SQLException(
"(" + myclass + ":" + method + ":" + location + ":" + ex.getMessage() + ")");
}
}
public void setQuery(String q) {
cache = new Vector();
try {
ResultSet rs = statement.executeQuery(q);
ResultSetMetaData meta = rs.getMetaData();
colCount = meta.getColumnCount();
headers = new String[colCount];
for (int h = 1; h <= colCount; h++) {
headers[h - 1] = meta.getColumnName(h);
}
while (rs.next()) {
String[] record = new String[colCount];
for (int i = 0; i < colCount; i++) {
record[i] = rs.getString(i + 1);
}
cache.addElement(record);
} // while sonu
fireTableChanged(null);
} // try sonu
catch (Exception e) {
cache = new Vector();
e.printStackTrace();
}
} // setQuery sonu
/**
* Test that <code>Clob.getCharacterStream(long,long)</code> works on CLOBs that are streamed from
* store. (DERBY-2891)
*/
public void testGetCharacterStreamLongOnLargeClob() throws Exception {
getConnection().setAutoCommit(false);
// create large (>32k) clob that can be read from store
final int size = 33000;
StringBuilder sb = new StringBuilder(size);
for (int i = 0; i < size; i += 10) {
sb.append("1234567890");
}
final int id = BlobClobTestSetup.getID();
PreparedStatement ps =
prepareStatement("insert into blobclob(id, clobdata) values (?,cast(? as clob))");
ps.setInt(1, id);
ps.setString(2, sb.toString());
ps.executeUpdate();
ps.close();
Statement s = createStatement();
ResultSet rs = s.executeQuery("select clobdata from blobclob where id = " + id);
assertTrue(rs.next());
Clob c = rs.getClob(1);
// request a small region of the clob
BufferedReader r = new BufferedReader(c.getCharacterStream(4L, 3L));
assertEquals("456", r.readLine());
r.close();
c.free();
rs.close();
s.close();
rollback();
}
/**
* Gets a list of courses that belongs to an instructor. Throws InvalidDBRequestException if any
* error occured to the database connection.
*
* @param name the instructor's user name
* @return a vector containing the list of courses
* @throws InvalidDBRequestException
*/
public Vector getCourseList(String name) throws InvalidDBRequestException {
Vector courseList = new Vector();
try {
Connection db;
Class.forName(GaigsServer.DBDRIVER);
db =
DriverManager.getConnection(GaigsServer.DBURL, GaigsServer.DBLOGIN, GaigsServer.DBPASSWD);
Statement stmt = db.createStatement();
ResultSet rs;
// get the course list
rs =
stmt.executeQuery(
"select course_num, course_name from course where instructor = '"
+ name
+ "' order by course_num");
while (rs.next()) courseList.add(rs.getString(1) + " - " + rs.getString(2));
rs.close();
stmt.close();
db.close();
} catch (SQLException e) {
System.err.println("Invalid SQL in getCourseList: " + e.getMessage());
throw new InvalidDBRequestException("???");
} catch (ClassNotFoundException e) {
System.err.println("Driver Not Loaded");
throw new InvalidDBRequestException("Server Error");
}
return courseList;
}
/**
* Deletes an instructor from the database. Deletes the instructor's courses by invoking the
* deleteCourse method. Throws InvalidDBRequestException if instructor not in the database or
* other database connection problems.
*
* @see deleteCourse
* @param instructor instructor's user name
* @throws InvalidDBRequestException
*/
public void deleteInstructor(String instructor) throws InvalidDBRequestException {
try {
Class.forName(GaigsServer.DBDRIVER);
db =
DriverManager.getConnection(GaigsServer.DBURL, GaigsServer.DBLOGIN, GaigsServer.DBPASSWD);
Statement stmt = db.createStatement();
int count;
// delete the instructor's courses
ResultSet rs =
stmt.executeQuery(
"select course_num from course where instructor = '" + instructor + "'");
while (rs.next()) deleteCourse(rs.getString(1).trim(), instructor);
// delete the instructor's record
count = stmt.executeUpdate("delete from instructor where login ='******'");
rs.close();
stmt.close();
db.close();
} catch (SQLException e) {
System.err.println("Invalid SQL in addCourse: " + e.getMessage());
throw new InvalidDBRequestException("??? ");
} catch (ClassNotFoundException e) {
System.err.println("Driver Not Loaded");
throw new InvalidDBRequestException("Internal Server Error");
}
}
/**
* Deletes students who are older than a certain number of years and not registered to any course.
*
* @param year students older than year are candidates to be deleted
* @throws InvalidDBRequestException
*/
public void deleteOldStudent(int year) throws InvalidDBRequestException {
try {
Class.forName(GaigsServer.DBDRIVER);
db =
DriverManager.getConnection(GaigsServer.DBURL, GaigsServer.DBLOGIN, GaigsServer.DBPASSWD);
Statement stmt = db.createStatement();
// query all student who have been in the database longer than a number of years and not
// registered to any course
ResultSet rs =
stmt.executeQuery(
"select login, count(course_id) "
+ "from student s left join courseRoster r on login = user_login "
+ "where date_entered < SUBDATE(now(), INTERVAL "
+ new String().valueOf(year).trim()
+ " YEAR) "
+ "group by login, date_entered");
// delete them
while (rs.next()) if (rs.getInt(2) == 0) purgeStudent(rs.getString(1).trim());
rs.close();
stmt.close();
db.close();
} catch (SQLException e) {
System.err.println("Invalid SQL in addCourse: " + e.getMessage());
throw new InvalidDBRequestException("??? ");
} catch (ClassNotFoundException e) {
System.err.println("Driver Not Loaded");
throw new InvalidDBRequestException("Internal Server Error");
}
}
public String checkValidLogin(String myUserName, String myPW) {
try {
Class.forName(javaSQLDriverPath);
Connection conn =
(Connection) DriverManager.getConnection(ConnectionPath, ConnectionUser, ConnectionPW);
Statement st = conn.createStatement();
String query = "Select * from User";
ResultSet rs = st.executeQuery(query);
while (rs.next()) {
// return rs.getString("Username");
if (myUserName.equals(rs.getString("Username"))) {
if (myPW.equals(rs.getString("Password"))) {
setUserVariables(myUserName);
return "success";
} else {
return "wrongPassword";
}
}
}
rs.close();
st.close();
conn.close();
return "userNotFound";
} catch (Exception e) {
return e.getMessage();
}
}
public List<ClientEventEntry> findLogEvents(
List<SearchConstraint> constraints, List<String> orderBy, int offset, int limit, Connection c)
throws SQLException {
StringBuffer sql =
new StringBuffer(
"select e.event_id, e.customer_id, e.user_id, e.event_time, e.description, e.has_log_file from dat_client_log_events e ");
appendWhere(sql, constraints, s_propToColumnMap);
appendOrderBy(sql, orderBy, "e.event_id desc", s_propToColumnMap);
appendLimits(sql, offset, limit);
Statement stmt = null;
ResultSet rs = null;
try {
stmt = c.createStatement();
rs = stmt.executeQuery(sql.toString());
List<ClientEventEntry> results = new ArrayList<ClientEventEntry>();
while (rs.next()) {
ClientEventEntry entry =
new ClientEventEntry(
rs.getInt(1),
rs.getInt(2),
rs.getInt(3),
resolveDate(rs.getTimestamp(4)),
rs.getString(5),
rs.getInt(6) != 0);
results.add(entry);
}
return results;
} finally {
DbUtils.safeClose(rs);
DbUtils.safeClose(stmt);
}
}
/* to search the DB table for req. video*/
boolean search(String file) {
boolean found = false;
Connection con = null;
String url =
"jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)}; DBQ=D://db.mdb; DriverID=22;READONLY=true;";
try {
con = DriverManager.getConnection(url, "", "");
try {
Statement st = con.createStatement();
ResultSet rs = st.executeQuery("SELECT video FROM p3");
while (rs.next()) {
String colvalue = rs.getString("video");
if (colvalue.equalsIgnoreCase(file)) found = true;
}
} catch (SQLException s) {
System.out.println("SQL statement is not executed!");
}
} catch (Exception e) {
System.out.println(e);
}
return found;
}
/**
* Check the user's name and password and verify that the user is an instructor. Throws
* InvalidDBRequestException if user is not an instructor, wrong password, or if any error occured
* to the database connection.
*
* @param name user's user name
* @param pass user's password
* @throws InvalidDBRequestException
*/
public void instructorLogin(String name, String pass) throws InvalidDBRequestException {
try {
Connection db;
Class.forName(GaigsServer.DBDRIVER);
db =
DriverManager.getConnection(GaigsServer.DBURL, GaigsServer.DBLOGIN, GaigsServer.DBPASSWD);
Statement stmt = db.createStatement();
ResultSet rs;
// check if instructor
rs = stmt.executeQuery("select password from instructor where login = '******'");
if (!rs.next()) {
if (debug) System.out.println("User not found in the instructor table");
throw new InvalidDBRequestException("Instructor not registered");
}
// check password
if (!rs.getString(1).equals(pass)) {
if (debug) System.out.println("Invalid password for user: "******"Invalid password for user: "******"Invalid SQL in instructor login: "******"???");
} catch (ClassNotFoundException e) {
System.err.println("Driver Not Loaded");
throw new InvalidDBRequestException("Server Error");
}
}
public List<Empleado> getAllEmpleados() {
List ll = new LinkedList();
Statement st;
ResultSet rs;
String url = "jdbc:mysql://localhost:3306/food";
String user = "******";
String pass = "******";
String driver = "com.mysql.jdbc.Driver";
try (Connection connection = DriverManager.getConnection(url, user, pass)) {
Class.forName(driver);
st = connection.createStatement();
String recordQuery = ("Select * from empleados");
rs = st.executeQuery(recordQuery);
while (rs.next()) {
Integer id = rs.getInt("idEmpleados");
String name = rs.getString("Nombre");
String telf = rs.getString("Telefono");
ll.add(new Empleado(id, name, telf));
/// System.out.println(id +","+ name +","+ apellido +","+ cedula +","+ telf +"
// "+direccion+"");
}
} catch (ClassNotFoundException | SQLException ex) {
Logger.getLogger(MenuEmpleados.class.getName()).log(Level.SEVERE, null, ex);
}
return ll;
}