Calling a procedure in postgresql using JDBC

Question

Hai,
I am using POSTGRESQL 8.0.3 and Java 1.5.
I wrote a follwing procedure in POSTGRESQL. When I tried to call this procedure using JAVA I am getting the following exception.
Exception in thread "main" java.sql.SQLException: ERROR: syntax error at or near "$1"
        at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:1471)
        at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1256)
        at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:175)
        at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:389)
        at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:330)
        at org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:240)
        at ShowSurabhi2.main(ShowSurabhi2.java:44)Code Snippet to call the procedure
Class.forName("org.postgresql.Driver");
dbcon = DriverManager.getConnection(loginUrl, loginUser, loginPasswd);
CallableStatement cs=dbcon.prepareCall("{call proc1()}");
cs.execute();
ResultSet rs = (ResultSet)cs.getObject(1);
// Iterate through each row of rs
                while (rs.next())
                   id = rs.getInt(1);
                   name=rs.getString(2);
                }Procedure in POSTGRESQL named, proc1
declare tt numeric;
begin
select max(id) into tt from test
tt = tt + 1;
ret tt;
end;Regards
ackumar

Answer 1

Ah, there's a bug in your pgsql, I think. Here's the amended sproc I was using:
create or replace function testSproc()
   returns numeric
as
   declare tt numeric;
begin
   select max(id) into tt from test;
   tt = tt + 1;
   return tt;
end
language 'plpgsql';Note that it's "return tt", not "ret tt"
Here's my test table and data:
create table test (
   id integer
insert into test (id) values (1);
insert into test (id) values (2);
insert into test (id) values (3);
insert into test (id) values (4);
insert into test (id) values (5);I didn't try it with your code, which I suspect is wrong - it seems to presume a result set is being returned - but the following works as-is against my database. Obviously change the url/username/password for your scenario.
import java.sql.*;
public class Sproc {
   public static void main(String[] args)
      throws Exception
      String loginUrl = "jdbc:postgresql:junit";
      String loginUser = "junit";
      String loginPasswd = "junit";
      Class.forName("org.postgresql.Driver");
      Connection dbcon = DriverManager.getConnection(loginUrl, loginUser, loginPasswd);
      CallableStatement cs= dbcon.prepareCall("{call testSproc()}");
      ResultSet rs = cs.executeQuery();
      while(rs.next()) {
         System.out.println(rs.getInt(1));
}