SQL error with LIKE clause in statement

Question

Can anyone explain how an SQL statement with a LIKE clause is executed properly?
Seems like it ought to be cut and dried, no pun intended!
When I run the following and set the requestor name = ?, and correctly type in the entire name, a result set (albeit abbreviated) will return.
But if I try to set the request param to LIKE I get an error of some kind, either invalid cursor state or NullPointer exception.
Here's my code.
Statement selstmt = connection.createStatement();          
String preparedQuery = "SELECT DISTINCT AID, ACTIVE, REQUESTOR_NAME,REQUESTOR_EMAIL" +
" FROM CHANGE_CONTROL_USER, CHANGE_CONTROL_ADMIN " +
" WHERE REQUESTOR_NAME LIKE '%?%';";
  String reqName = request.getParameter("requestor_name");
PreparedStatement prepstmt = connection.prepareStatement(preparedQuery);
prepstmt.setString(1, reqName);
ResultSet rslts = prepstmt.executeQuery();
rslts.next();
int aidn = rslts.getInt(1);          
int actbox = rslts.getInt(2);      
String reqname = rslts.getString(3);
String reqemails = rslts.getString(4);It's also returning only 1 record for some reason, as I have the following:
<% while (rslts.next()) { %>
  <tr class="style17">
    <td><%=reqname%></td>
<td><%=reqemails%></td>
   <td><%=actbox %></td>
    <td><%=aidn %></td>
  </tr>
  <%
rslts.close();
selstmt.close();
%>If I use
" FROM CHANGE_CONTROL_USER, CHANGE_CONTROL_ADMIN " +
" WHERE REQUESTOR_NAME = ?;";it will actually spit out the name and corresponding email properly, albeit just one record like I said.
Is there some kind of escape sequence I should be using that I'm not?
And why just the one record?
Any help or direction is appreciated!
Thanks.

Answer 1

I have working code for LIKE in PreparedStatement, and its equivalent in your case is something like this:Statement selstmt = connection.createStatement();          
String preparedQuery = "SELECT DISTINCT AID, ACTIVE, REQUESTOR_NAME,REQUESTOR_EMAIL" +
" FROM CHANGE_CONTROL_USER, CHANGE_CONTROL_ADMIN " +
" WHERE REQUESTOR_NAME LIKE ?";
  String reqName = request.getParameter("requestor_name");
PreparedStatement prepstmt = connection.prepareStatement(preparedQuery);
prepstmt.setString(1, "%" + reqName.trim() + "%");
ResultSet rslts = prepstmt.executeQuery();
rslts.next();
int aidn = rslts.getInt(1);          
int actbox = rslts.getInt(2);      
String reqname = rslts.getString(3);
String reqemails = rslts.getString(4);