Solved

java.sql.SQLException: Function sequence error

Posted on 2014-02-25
11
1,211 Views
Last Modified: 2014-02-26
I am getting "Function sequence error " when trying to run this code:

 
import java.io.FileInputStream;
import java.sql.*;
import java.util.Properties;

public class  Prep  {


	private static final  String  USERNAME = "JDBC";
	private static final  String  PASSWORD =  "PASSWORD";

	private static final String  jdbcstr = "jdbc:as400:/COM.COM.COM";	



    public static void main(String[] args) {
 
		String salesku  = "78111";
		PreparedStatement stmt  = null;
		Connection con = null;
		
	    try 
        {
                                
	     DriverManager.registerDriver(new com.ibm.as400.access.AS400JDBCDriver());
		 con  = (Connection) DriverManager.getConnection(jdbcstr, USERNAME,PASSWORD);	

         
	     String sql  = "SELECT  * from   MYLIB.SALES  WHERE  ((YEAR = 2012 AND MONTH >=5)  OR (YEAR = 2014 AND MONTH <= 02)) AND DIST in (1) AND SKU  =  ?";

		 System.out.println(sql);
	     	
	     stmt =  con.prepareStatement(sql);   
		 stmt.setString(1,"salessku");

	     ResultSet rs = stmt.executeQuery(sql);
	
	           // Get MetaData for Db2 table
            ResultSetMetaData metaData = rs.getMetaData();
            int colCount = metaData.getColumnCount();
 
            // Iterate through the Db2 data in the result set
            while (rs.next()) {
                for (int i = 0; i < colCount; i++) {
                    System.out.println(metaData.getColumnName(i + 1) + ": " + rs.getString(i+1));
                }  
            }
    	
       
        }


             catch (Exception ex) {  
                
           			ex.printStackTrace(System.err);     
   
          }

           finally {
            if (stmt != null) try { stmt.close(); } catch(Exception e) {}
            if (con != null) try { con.close(); } catch(Exception e) {}
        }    

     }
        
 }  

Open in new window

0
Comment
Question by:sniger
  • 6
  • 4
11 Comments
 
LVL 35

Expert Comment

by:mccarl
ID: 39887495
Can you please provide the full stack trace that you are getting?
0
 

Author Comment

by:sniger
ID: 39888456
mccarl:

java.sql.SQLException: Function sequence error.                              
        at com.ibm.as400.access.JDError.throwSQLException(JDError.java:408)  
        at com.ibm.as400.access.AS400JDBCPreparedStatement.executeQuery(AS400
JDBCPreparedStatement.java:1615)                                             
        at Prep.main(Prep.java:35)                                           

Open in new window

0
 
LVL 35

Expert Comment

by:mccarl
ID: 39888519
A couple of comments to make...

1) You can use the following connection string which should be able to give you more details on the exception being thrown. If you run the code with this, post the updated stack trace and we can go from there.
	private static final String  jdbcstr = "jdbc:as400:/COM.COM.COM;errors=full";

Open in new window

2) Rather than the call to DriverManager.registerDriver, the generally accepted way of loading the driver is as below. It probably won't make a difference to your current issue, but is something you might want to change, just in case. The difference is that in your code, the driver will actually get registered twice, once when the class is loaded and again due to the registerDriver call. The below only registers it once, when the class is loaded.
    Class.forName("com.ibm.as400.access.AS400JDBCDriver");

Open in new window

0
 

Author Comment

by:sniger
ID: 39888642
mmcarl,

I modified as suggested, and the error stack is still the same
0
 
LVL 35

Accepted Solution

by:
mccarl earned 500 total points
ID: 39888668
Ahhh, I just found what the problem is (I hope). Change line 35 of your code above to this...
	     ResultSet rs = stmt.executeQuery();

Open in new window

The change is that we are calling a different version of .executeQuery, the one WITHOUT the sql as the argument, because the sql was already given to con.prepareStatement(sql);
0
DevOps Toolchain Recommendations

Read this Gartner Research Note and discover how your IT organization can automate and optimize DevOps processes using a toolchain architecture.

 

Author Comment

by:sniger
ID: 39888677
I removed SQL, it executes fine, but rs is null, and I know for sure I have data
0
 

Author Comment

by:sniger
ID: 39888683
ok, to be exact rs is CRSR0001

which i don't know what it means
0
 

Author Comment

by:sniger
ID: 39888768
actually it works , it did not like  * in the query. Thanks for pointing me into the right direction
0
 
LVL 35

Expert Comment

by:mccarl
ID: 39890541
it did not like  * in the query
That's strange because I'm sure that I have done similar before, maybe it is an AS400 specific limitation. However, it is generally a good idea to list the columns you want returned anyway.

ok, to be exact rs is CRSR0001
I'm not sure what you meant here, were you debugging the code to get this value or did you "print" it to console or something. "rs" is an object that has methods that you call on it, I don't know how it can have a "value" as such.

actually it works ..... Thanks for pointing me into the right direction
Not a problem, glad to help! :)
0
 

Author Comment

by:sniger
ID: 39890669
I don't know either,

so summerizing, removing sql  from executeQuery eliminated the run time error, then to get any results back I had to explicitly name the columns. Thanks again
0

Featured Post

3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Java had always been an easily readable and understandable language.  Some relatively recent changes in the language seem to be changing this pretty fast, and anyone that had not seen any Java code for the last 5 years will possibly have issues unde…
Introduction This article is the second of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article covers the basic installation and configuration of the test automation tools used by…
Viewers learn about the “while” loop and how to utilize it correctly in Java. Additionally, viewers begin exploring how to include conditional statements within a while loop and avoid an endless loop. Define While Loop: Basic Example: Explanatio…
Viewers will learn about if statements in Java and their use The if statement: The condition required to create an if statement: Variations of if statements: An example using if statements:

911 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

15 Experts available now in Live!

Get 1:1 Help Now