Kështu i printoj rezultatet në tabelën standarde relacionale duke përdorur JAVA. Megjithatë unë jam duke përdorur një tabelë objekt-relacionale.
public static void results_view ()
throws SQLException
{ String sql =
"SELECT * from House";
try { Connection conn = DriverManager.getConnection
("jdbc:default:connection:");
PreparedStatement pstmt = conn.prepareStatement(sql);
ResultSet rset = pstmt.executeQuery();
printResults(rset);
rset.close();
pstmt.close();
}
catch (SQLException e) {System.err.println(e.getMessage());
}
}
static void printResults (ResultSet rset)
throws SQLException { String buffer = "";
try { ResultSetMetaData meta = rset.getMetaData();
int cols = meta.getColumnCount(), rows = 0;
for (int i = 1; i <= cols; i++)
{
int size = meta.getPrecision(i);
String label = meta.getColumnLabel(i);
if (label.length() > size) size = label.length();
while (label.length() < size) label += " ";
buffer = buffer + label + " "; }
buffer = buffer + "\n";
while (rset.next()) {
rows++;
for (int i = 1; i <= cols; i++) {
int size = meta.getPrecision(i);
String label = meta.getColumnLabel(i);
String value = rset.getString(i);
if (label.length() > size) size = label.length();
while (value.length() < size) value += " ";
buffer = buffer + value + " "; }
buffer = buffer + "\n"; }
if (rows == 0) buffer = "No data found!\n";
System.out.println(buffer); }
catch (SQLException e) {System.err.println(e.getMessage());} }
Si t'i printoj rezultatet në rastin e tabelës relacionale të objektit?
Rasti im më poshtë:
CREATE OR REPLACE TYPE Boat AS OBJECT(
Name varchar2(30),
Ident number,
);
CREATE OR REPLACE TYPE Type_boats AS TABLE OF Boat;
CREATE TABLE HOUSE(
Name varchar2(40),
MB Type_boats)
NESTED TABLE MB store as P_Boat;
INSERT INTO House VALUES ('Name',Type_boats(Boat('Boat1', 1)));
Kam edhe paketen e shkruar me proçeduren per te thirrur qe duket keshtu..
CRATE OR REPLACE package House_boats
PROCEDURE add(everything works here)
PROCEDURE results_view;
END House_boats;
CREATE OR REPLACE Package.body House_boats AS
PROCEDURE add(everything works here) AS LANGUAGE JAVA
Name House_boats.add(...)
PROCEDURE results_view AS LANGUAGE JAVA
Name House_boats.resuts_view();
END House_boats;
Pra, po, në thelb unë thjesht nuk e di se si t'i printoj ato në rast të objekteve.
Unë e thërras atë duke përdorur:
CALL House_boats.results_view(); <<< nothing works here.