Solved

how to handle auto generate number java with MS Sql Server in prepared statement

Posted on 2008-10-30
7
558 Views
Last Modified: 2013-11-23
I attempt to insert values into MS Sql server table with auto generate number.
I use prepared statement.
how can I handle it. ?
My comments are in the code below
I appreciate anyone's suggestion.
Chris



String insertQry = " insert into " + eventView +
         "(EV_ID_NUMBER "         +  //auto number
         "SI_ID"                             +
         ", EV_COUNT_DATE"     +
         ", EV_DIR"                        +
         " ,EV_CONS"                   +
         " ,EV_INS_DATE"            +
         " ,EV_INS_WEATHER"    +
         " ,EV_REM_DATE"           +
         " ,EV_REM_WEATER"  +
         " ,EV_STATION_TYPE"  +
         " ,EV_RECEIVE_DATE)"  +
         "VALUES (?,?,?,?,?,?,?,?,?,?,?)";
// staID_FK - it is a number - used as a foreign key
//staInfoFromFile it is an object that contain incoming information, I need to insert to database
   MSSqlServer.updateQuery(insertQry, staID_FK, staInfoFromFile);
//-----------different class----------------------
public static void updateQuery (String query,Integer staID_FK, StationInfoStructure staInfoFromFile ) {
       try {
          PreparedStatement pstmt = connection.prepareStatement(query);
          //HERE I should add somehow auto number, but I am not sure
          //exactly how.... ???
          //set the values
          pstmt.setInt(1, staID_FK);
          pstmt.setString(2, staInfoFromFile.getCountDate() );
          pstmt.setString(3,staInfoFromFile.getDirection() );    
          pstmt.setString(4,staInfoFromFile.getConsultant());
          pstmt.setString(5, staInfoFromFile.getInstallDate() );
          pstmt.setString(6, staInfoFromFile.getInstallWeather());
          pstmt.setString(7,staInfoFromFile.getRemoveDate() );
          pstmt.setString(8,staInfoFromFile.getRemoveWeather() );
          pstmt.setString(9,staInfoFromFile.getStationType() );
          //data for testing purposes only , later get the NOW date
          //from the system.    
          pstmt.setString(10, "1/1/2009");
          //execute insert statement
          pstmt.executeUpdate();        
          
       } catch (SQLException ex) {
          StringWriter sw = new StringWriter();
          PrintWriter pw = new PrintWriter(sw);
          ex.printStackTrace(pw);
          JOptionPane.showMessageDialog ( null, new SubControllerErrorPanel("Error Occured in the Application", " Error when inserting/updating records in DB, MSSqlserver class.   \n" + sw.toString()),
                                                                                 "Submission Controller  Error",JOptionPane.ERROR_MESSAGE);
       }
           
    }

Open in new window

0
Comment
Question by:mordauth
  • 4
  • 3
7 Comments
 
LVL 59

Expert Comment

by:Kevin Cross
ID: 22845209
Remove this EV_ID_NUMBER from the INSERT statement and don't pass a value for it.

The database will take care of the autonumbering/value on insert, so you can just leave it off.


String insertQry = " insert into " + eventView +
         "(SI_ID"                             +
         ", EV_COUNT_DATE"     +
         ", EV_DIR"                        +
         " ,EV_CONS"                   +
         " ,EV_INS_DATE"            +
         " ,EV_INS_WEATHER"    +
         " ,EV_REM_DATE"           +
         " ,EV_REM_WEATER"  +
         " ,EV_STATION_TYPE"  +
         " ,EV_RECEIVE_DATE)"  +
         "VALUES (?,?,?,?,?,?,?,?,?,?)";

Open in new window

0
 
LVL 1

Author Comment

by:mordauth
ID: 22846359
It was my first try.
But I received an error message.
(I did similar program in Delphi, and there a database handled auto number; however Delphi uses different database driver)
It said about trying to insert "null" value into the column, which is not allowed.
I use JDBC driver.
0
 
LVL 59

Expert Comment

by:Kevin Cross
ID: 22846415
See if one of the 10 parameter values is returning null in your code -- use debugger of your development environment if you have one.  See if the values being passed are null at any point.  Either change the database column to allow nulls if column is optional or change code to pass "" for any nulls you find.
0
PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

 
LVL 1

Author Comment

by:mordauth
ID: 22846781
I used the debugger.
However, I think I have to change a method I use for Insert.
Using prepare statement is not going to work with AutoGenerated ID.
I found some refence about the following method: executeUpdate(String sql, int autoGeneratedKeys)
I think I have to change my insert into regular Sql statement and execute it with this method.
 
0
 
LVL 59

Expert Comment

by:Kevin Cross
ID: 22846796
Cool.  Glad you found that.  You should select your comment as solution if it works so future readers will know that solves it.
0
 
LVL 1

Author Comment

by:mordauth
ID: 22846823
Thanks for the advice.
Before I do it...I have to test it if it actually works, then I can post a solution
0
 
LVL 1

Accepted Solution

by:
mordauth earned 0 total points
ID: 22852912
To clarify,
The prepare statement works on MS Sql Server.
In order to execute use the following method:
executeUpdate() with no parameters.

0

Featured Post

Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Windows 10 IE Certificate Issue 10 45
How to convert String matching to regex in java 4 33
hibernate jars 4 30
How do I remove an object from a 3 26
Java contains several comparison operators (e.g., <, <=, >, >=, ==, !=) that allow you to compare primitive values. However, these operators cannot be used to compare the contents of objects. Interface Comparable is used to allow objects of a cl…
Introduction Java can be integrated with native programs using an interface called JNI(Java Native Interface). Native programs are programs which can directly run on the processor. JNI is simply a naming and calling convention so that the JVM (Java…
Viewers learn how to read error messages and identify possible mistakes that could cause hours of frustration. Coding is as much about debugging your code as it is about writing it. Define Error Message: Line Numbers: Type of Error: Break Down…
This theoretical tutorial explains exceptions, reasons for exceptions, different categories of exception and exception hierarchy.

777 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