The World Of Gavin » db2

DB2 Error Codes

gavin — Sun, 20 Sep 2009 13:19:55 +0000

Errors when running Control Centre

If you encounter an error dialog stating db2javit : rc - 9505 when starting the control centre, it’s possible you’re running Windows Vista/Windows 7. If so, this might be a permissions problem.

Run the control centre as administrator, by right-clicking the icon and selecting Run as administrator

SQL errors

SQLCODE	SQLSTATE	Cause
-7	42601	Special characters, e.g. `\n` or `&` in SQL
-180	22007	Date/Time/Timestamp in invalid format
-104	42601	I had this when a field was missing a value, e.g `field=`
-204	42704	Invalid table name
-206	42703	Invalid field name
-408	42821	Bad use of quotes in `field=`. E.g `field='1'` for integer (example of incorrect style.
-530	23503	Broken specified constraint. The constraint will probably have an entirely unrecognisable name, such as `DB2ADMIN.VISIT.CC1253444571125`. I got this error when I had a foreign key, and tried to insert a row with a value that wasn’t in the foreign table.

DB2

gavin — Sun, 20 Sep 2009 12:24:54 +0000

Pages by me

Useful links

Link	Applies to version
DB2 9 InfoCenter page on datatypes	9, at least

DB2 and JDBC

gavin — Sun, 20 Sep 2009 12:07:49 +0000

You need to include

db2jcc.jar
db2jcc_license_cu.jar

on the classpath of the application. These can be found in the java/ sub-directory of the db2 install directory (Program Files/IBM/SQLLIB for me on Windows).

Connecting

The connection server string depends on whether you are using type2 or type4.

Type 1: JDBC-ODBC Bridge

Type 2: Native-API/partly Java driver

Type 3: Net-protocol/all-Java driver

Type 4: Native-protocol/all-Java driver

Source: http://www.javaworld.com/javaworld/jw-07-2000/jw-0707-jdbc.html

Type2:

jdbc:db2:database

Type4:

jdbc:db2//server[:port]/database

Sample code

Opens a connection, executes a query and then closes the connection.


/* Load the driver */
Class.forName("com.ibm.db2.jcc.DB2Driver").newInstance();

/* open the connection */
Connection conn = DriverManager.getConnection(url, user, password);

Statement st = conn.createStatement();

/* Execute a simple query to test the connection */
ResultSet rs = st.executeQuery("SELECT COUNT(*) FROM myTable");
rs.next();

/* Print the query results */
System.out.println(rs.getInt(1));

/* don't forget to close the connection */
conn.close();