Solved

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

Posted on 2008-10-30
7
577 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
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 3
7 Comments
 
LVL 60

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 60

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
Revamp Your Training Process

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action.

 
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 60

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

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

Are you developing a Java application and want to create Excel Spreadsheets? You have come to the right place, this article will describe how you can create Excel Spreadsheets from a Java Application. For the purposes of this article, I will be u…
Java Flight Recorder and Java Mission Control together create a complete tool chain to continuously collect low level and detailed runtime information enabling after-the-fact incident analysis. Java Flight Recorder is a profiling and event collectio…
Viewers learn about the scanner class in this video and are introduced to receiving user input for their programs. Additionally, objects, conditional statements, and loops are used to help reinforce the concepts. Introduce Scanner class: Importing…
Viewers will learn about arithmetic and Boolean expressions in Java and the logical operators used to create Boolean expressions. We will cover the symbols used for arithmetic expressions and define each logical operator and how to use them in Boole…

729 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