JDBC Interface with Oracle9

Question

I am having issues with the following query. One of my co-workers say that this is a result of PreparedStatement being buggy in java, but I thought that was odd since I know may developers user this class.
In the example code below, the "rs.next()" produces a "false" result. When using the same query in the database and substituting the values, I get one row. This contradicts. Also, it is worth noting that if I remove "field_a3" and "field_a4", I get one row back. I have disected my code down to this primitive level with a lot of confusion and fustration. Any information or advise on making this code below work properly would be appreciated.
thanks
query = "SELECT * "+
"FROM table3 WHERE field_a1 = ? AND " +
"field_a2 = ? AND field_a3 = ? AND field_a4 = ?";
Context context = new InitialContext();
DataSource ds = (DataSource) context.lookup("example_ds");
Connection conn = ds.getConnection();
PreparedStatement pstmt = conn.prepareStatement(query);
pstmt.setString(1,"L1");
pstmt.setString(2,"hcgs");
pstmt.setString(3,"467759");
pstmt.setString(4,"sc");
ResultSet rs = pstmt.executeQuery();
System.out.println("next is <" + rs.next() + ">");

Answer 1

I am having issues with the following query. Oneof
my co-workers say that this is a result of
PreparedStatement being buggy in java, Without qualification that statement is completely
false.
Well, I am only quoting what he said. I thought it was odd personally. The issue mainly stemmed from using PreparedStatements in conjunction with Informix databases.
>>
In the example code below, the "rs.next()" producesa
"false" result. When using the same query in the
database and substituting the values, I get onerow.
This contradicts. Also, it is worth noting thatif
I remove "field_a3" and "field_a4", And what are the field types of those?
Char fields, versus varchar, require padded matches
or trims.The fields are char(2), char(4), char(10) and char(4). Weblogic 8.1 is used for doing the datasource lookup to the Oracle 9 database.
How are padded or trimmed matches done? I assume I am trimming on the selected field to match the value that is being set in the PreparedStatement. I will rewrite the query and see what happens.