Re: [PATCHES] Anoter JDBC Error

Ahh, never mind. I tried again a few minutes later, and got the
new behavior, which is to say a SQLException. But I don't
understand why this is happening. Here's what I'm doing:

I create the database "test" (in my PG 7.2.2 DB) with a table with
3 columns, all integers. I connect using the JDBC3 driver, get a
connection, get the databasemetadata, call

dbmd.getColumns("test",null,"tablename","%");

I get back a ResultSet. Column 9 is an integer column,
DECIMAL_DIGITS. If I call getObject, it tries to get an Integer object,
so even the ResultSet thinks it's an integer column. However, the result
of getString/getFixedString used for new Integer(getFixedString()) is
apparently an empty String, causing the SQLException due to a badly
formatted Integer value.

So now I'm confused. What's an empty String doing in an integer
column when (if you believe the logic in getFixedString) the value was not
null? Is this broken null handling? Test program and results attached...

Aaron

import java.sql.*;

public class PostgresTest{
public static void main(String args[]) {
try {
Class.forName("org.postgresql.Driver");
Connection con =
DriverManager.getConnection("jdbc:postgresql://localhost/test", "test",
"password");
DatabaseMetaData dmd = con.getMetaData();
ResultSet rs = dmd.getColumns("test", null, "tablename", "%");
rs.next();
System.out.println("Col 9: "+rs.getInt(9)); // getObject(9)
rs.close();
con.close();
} catch(Exception e) {
e.printStackTrace();
}
}
}

Bad Integer
at
org.postgresql.jdbc1.AbstractJdbc1ResultSet.toInt(AbstractJdbc1ResultSet.java:708)
at
org.postgresql.jdbc1.AbstractJdbc1ResultSet.getInt(AbstractJdbc1ResultSet.java:148)
at PostgresTest.main(PostgresTest.java:12)