Cursor in JDBC

Hello

I have been trying to implement a cursor in a pljava using the JDBC, but I
get an error when I run de function, which is the following:
SPI function SPI_prepare failed with error code -5
How can I solve this error? Here is the code that I am using:

StringBuffer select = new StringBuffer();
select.append("select distinct on (n.companyid,n.custid) n.companyid,
n.custid,n.noteid,ssn,");
select.append
("dateadded,notetotal,interest,fee1,notepayments,notetype,notepmt,");
select.append("metro2asc,n.notecage,notestatus,metro2sc,metro2cc,
n.notebalance,notefirstpmt,");
select.append
("noteclosed,noteDLP,lastname,firstname,suffix,birthdate,homephone,metro2cii,country,");
select.append("address,city,state,zip,getDueAmount(n.noteid
,"+ConstantsEngine.LEDGER+"),");
select.append("getPmtHist(c.custid,''"+iDate+"'',''"+eDate+"''),f.amount,
f.trantype,a.postdate,f2.amount as woff,equifaxId,experianId,transunionId
from ");
select.append(viewCusts+" as c JOIN ");
select.append(viewNotes+" as n USING (custid,companyid) LEFT OUTER JOIN ");
select.append(viewFintrans+" as f ON (n.noteid =f.noteid and
(credit="+ConstantsEngine.LEDGER+" or debit="+ConstantsEngine.LEDGER+") ");
select.append("and (trantype=1 or trantype=-1) and date(f.postdate
)>=date(''"+initDate.toSqlFull(company.getTZ())+"'') ");
select.append("and date(f.postdate)<=date(''"+limitDate.toSqlFull(
company.getTZ())+"'')) LEFT OUTER JOIN "+viewAgehist+" as a ");
select.append("ON (n.noteid=a.noteid and a.notecage=''30 days'')");
select.append(" LEFT OUTER JOIN "+viewFintrans+" as f2 ON (n.noteid =
f2.noteid and f2.credit=10610 and f2.trantype=20)");
select.append(" LEFT OUTER JOIN "+viewCompany+" as cp ON (cp.companyid =
n.companyid)");
select.append(" WHERE n.custid=c.custid ");
select.append(" and ((notestatus=4 or notestatus=1 or
date(noteclosed)>=date(''"+endDate.toSqlFull(company.getTZ())+"'')))");
select.append(" and date(noteclosed)<=date(''"+limitDate.toSqlFull(
company.getTZ())+"'') and ");
select.append("date(notemade)<=date(''"+limitDate.toSqlFull(company.getTZ())+"'')
order by n.companyid,n.custid,postdate desc");
Statement m_statement = DriverManager.getConnection
("jdbc:default:connection").createStatement();
int result = m_statement.executeUpdate("DECLARE metro2cursor CURSOR FOR
"+select.toString());
ResultSet rs = m_statement.executeQuery("fetch all in metro2cursor");
if(rs!=null){
while(rs.next()){
//get data
String companyId = rs.getString("companyId");
}
}
m_statement.executeUpdate("CLOSE metro2cursor");
m_statement.close();

Thanks for any help.