call stored procedure using java

Here it shows how to call a stored procedure from java program.

CallableStatement cs;
try {

//CASE 1 ----- Call a stored procedure with no parameters

cs = connection.prepareCall("{call myproc}");
cs.execute();
// Call a procedure with one IN parameter
cs = connection.prepareCall("{call myprocin(?)}");
// Set the value for the IN parameter
cs.setString(1, "test");
// Execute the stored procedure
cs.execute();

//CASE 2------- Call a stored procedure with one OUT parameter

cs = connection.prepareCall("{call myprocout(?)}");
// Register the type of the OUT parameter
cs.registerOutParameter(1, Types.VARCHAR);
// Execute the stored procedure and retrieve the OUT value
cs.execute();
String outParam = cs.getString(1); // OUT parameter

//CASE 3 ----- Call a stored procedure with one IN/OUT parameter

cs = connection.prepareCall("{call myprocinout(?)}");
// Register the type of the IN/OUT parameter
cs.registerOutParameter(1, Types.VARCHAR);
// Set the value for the IN/OUT parameter
cs.setString(1, "test");
// Execute the stored procedure and retrieve the IN/OUT value
cs.execute();
outParam = cs.getString(1); // OUT parameter


} catch (SQLException e) {
}

calling sql functions using java

Here it shows how to call a sql function from java program.

CallableStatement cs;
try {

// CASE 1  --- Call a function with no parameters; the function returns a VARCHAR

cs = connection.prepareCall("{? = call myfunc}");
// Register the type of the return value
cs.registerOutParameter(1, 15);
// Execute and retrieve the returned value
cs.execute();
String retValue = cs.getString(1);

//CASE 2  --- Call a function with one IN parameter; the function returns a VARCHAR

cs = connection.prepareCall("{? = call myfuncin(?)}");
// Register the type of the return value
cs.registerOutParameter(1, Types.VARCHAR);
// Set the value for the IN parameter
cs.setString(2, "test");
// Execute and retrieve the returned value
cs.execute();
String retValue = cs.getString(1);

//CASE 3 ---- Call a function with one OUT parameter; the function returns a VARCHAR

cs = connection.prepareCall("{? = call myfuncout(?)}");
// Register the types of the return value and OUT parameter
cs.registerOutParameter(1, Types.VARCHAR);
cs.registerOutParameter(2, Types.VARCHAR);
// Execute and retrieve the returned values
cs.execute();
String retValue = cs.getString(1); // return value
String outParam = cs.getString(2); // OUT parameter

//CASE 4 ---- Call a function with one IN/OUT parameter; the function returns a VARCHAR

cs = connection.prepareCall("{? = call myfuncinout(?)}");
// Register the types of the return value and OUT parameter
cs.registerOutParameter(1, Types.VARCHAR);
cs.registerOutParameter(2, Types.VARCHAR);
// Set the value for the IN/OUT parameter
cs.setString(2, "test");
// Execute and retrieve the returned values
cs.execute();
String retValue = cs.getString(1); // return value
String outParam = cs.getString(2); // IN/OUT parameter

} catch (SQLException e) {
System.out.println(e);
}

Stored Procedure Names in a database using java

Retrieves the names of all stored procedures in a database.

try {
// Get database metadata
DatabaseMetaData dbmd = connection.getMetaData();

// Get all stored procedures
ResultSet resultSet = dbmd.getProcedures(null, null, "%");

// Get stored procedure names from the result set
while (resultSet.next()) {
String procName = resultSet.getString(3);
}

} catch (SQLException e) {
System.out.println(e);
}