Using MySQL 5.0.22, Connector/J 3.12. I have datafields defined as
BIT(1) type, which is supposed to map to java Boolean, which is great
because I am displaying resultset in a jTable and I want the BIT fields
displayed as checkboxes. Displaying data from the resultset is fine.
The problem is with updating the BIT fields. Here is the relevant
portion of the routine: (war_rs is a ResultSet, bleedingCB and
changeMedsCB  are checkboxes - the error I get is a data truncation
because BleedingProbs is too large when the insertRow() is executed).

       try {
           war_rs.moveToInsertRow();
           war_rs.updateString("ID",theID);
           war_rs.updateString("Date",dateFld.getText());
           war_rs.updateString("OldDose",oldDoseFld.getText());
           war_rs.updateString("PT",ptFld.getText());
           war_rs.updateString("INR",inrFld.getText());
           war_rs.updateString("Control",controlFld.getText());

war_rs.updateBoolean("BleedingProbs",bleedingCB.isSelected()); //This
is the field flagged as data truncated

war_rs.updateBoolean("ChangeInMeds",changeMedsCB.isSelected());
           war_rs.updateString("Comment",commentFld.getText());

war_rs.updateString("EntryBy",conn.getMetaData().getUserName());
           war_rs.insertRow(); // This is the line that actually
generates the error.
           updateID(theID);
       } catch (SQLException e) {
           e.printStackTrace();
       }