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Editorial Team
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Asked: 2026-05-25T02:41:52+00:00

while(rs.next()){ Object o = rs.getObject(i); System.out.println(o.getClass()); //prints java.lang.Integer } The problem is that I

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while(rs.next()){
          Object o = rs.getObject(i);
          System.out.println(o.getClass()); //prints java.lang.Integer
}

The problem is that I have a smallint type in the database and the driver returns an Integer type. I am doing some logic at runtime and then trying to insert the value back in the database using the type I was previously handed by the DB.

I would like DB2 to return me a java.lang.Short, but I am not sure if thats possible.

Has anyone encountered this before and what did you do for a workaround?

The basic issue is – I have both int and smallint columns in the DB2 database and I need my java code to figure out which is which based on the result set.

Thanks.

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1 Answer

  1. Editorial Team

    Instead of relying on the type of the Java object returned, ask the resultset for the actual database type of the column:

    String databaseTypeName = resultSet.getMetadata().getColumnTypeName(columnIndex);

    or 

    int sqlType = resultSet.getMetadata().getColumnType();
boolean isSmallInt = (sqlType == Types.SMALLINT);

    See http://download.oracle.com/javase/6/docs/api/java/sql/ResultSetMetaData.html. The javadoc is such a valuable source of information!

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