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Its value will be set by calling the setter methods of PreparedStatement. Why use PreparedStatement? Adobe photoshop lightroom 4 student. Improves performance: The performance of the application will be faster if you use PreparedStatement interface because query is compiled only once. How to get the instance of PreparedStatement? Invoke the PreparedStatement.getGeneratedKeys method or the Statement.getGeneratedKeys method to retrieve a ResultSet object that contains the automatically generated key values. If the column data type is SERIAL, the automatically generated keys in the ResultSet have a data type of INT. Use ResultSet.getInt to retrieve the values.
Re: preparedStatement.getGeneratedKeys() exception.
Posted by: Mark Matthews
Date: November 05, 2004 03:57PM
Date: November 05, 2004 03:57PM
- Hi, I'm using Derby. How can I retrieve the generated key of an insert statment? Best Regards Thorsten. PreparedStatement.getGeneratedKeys returns null.
- The following are Jave code examples for showing how to use getGeneratedKeys of the java.sql.PreparedStatement class. You can vote up the examples you like. Your votes will be used in our system to get more good examples.
> I am not trying to update a row, I am trying to insert a row and get the auto-gen-key back for the
> newly inserted row via getGeneratedKeys() after the pstmt.execute() is called.
> In this case I inserted a new row for dp_objtype and expect to get the objtypeid back in the ResultSet of
> getGeneratedKeys().
Yes, but then you're doing this (according to your prior posts), so I'm confused. You're treating something that obviously isn't an updatable result set like it is:
resultSet = pstmt.getGeneratedKeys();
if (resultSet != null && resultSet.next())
{
newid = resultSet.getInt(1);
resultSet.updateInt(1, newid+1);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
This result set is not updatable, why are you trying to call updateInt() on it????????
> Maybe my question is not to expect to use the updateable resultset, but why did pstmt.execute()
> expect an updateable resultset when the Connection.preparedStatement(string, return_auto_genkey) is used.
It _doesn't_..Your code is calling ResultSet.updateInt(), which is only valid for updatable result sets. Result sets returned from getGeneratedKeys() are _never_ updatable.
> When I use pstmt returned from Connection.preparedStatement(string), things work;
> but I cannot get the generated key.
That's to be expected, since you didn't tell the driver you wanted them :)
Explain why you want to call ResultSet.updateInt(), and maybe we'll get this figured out, but it appears you think ResultSet.updateInt() is going to do something with a generated key, but I'm still trying to figure out what you believe that 'something' is :(
-Mark
> newly inserted row via getGeneratedKeys() after the pstmt.execute() is called.
> In this case I inserted a new row for dp_objtype and expect to get the objtypeid back in the ResultSet of
> getGeneratedKeys().
Yes, but then you're doing this (according to your prior posts), so I'm confused. You're treating something that obviously isn't an updatable result set like it is:
resultSet = pstmt.getGeneratedKeys();
if (resultSet != null && resultSet.next())
{
newid = resultSet.getInt(1);
resultSet.updateInt(1, newid+1);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
This result set is not updatable, why are you trying to call updateInt() on it????????
> Maybe my question is not to expect to use the updateable resultset, but why did pstmt.execute()
> expect an updateable resultset when the Connection.preparedStatement(string, return_auto_genkey) is used.
It _doesn't_..Your code is calling ResultSet.updateInt(), which is only valid for updatable result sets. Result sets returned from getGeneratedKeys() are _never_ updatable.
> When I use pstmt returned from Connection.preparedStatement(string), things work;
> but I cannot get the generated key.
That's to be expected, since you didn't tell the driver you wanted them :)
Explain why you want to call ResultSet.updateInt(), and maybe we'll get this figured out, but it appears you think ResultSet.updateInt() is going to do something with a generated key, but I'm still trying to figure out what you believe that 'something' is :(
-Mark
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Re: preparedStatement.getGeneratedKeys() exception.
November 04, 2004 01:26PM
Re: preparedStatement.getGeneratedKeys() exception.
November 04, 2004 04:07PM
Re: preparedStatement.getGeneratedKeys() exception.
November 04, 2004 08:19PM
Re: preparedStatement.getGeneratedKeys() exception.
November 05, 2004 01:07AM
Re: preparedStatement.getGeneratedKeys() exception.
November 05, 2004 09:39AM
Re: preparedStatement.getGeneratedKeys() exception.
November 05, 2004 11:13AM
Re: preparedStatement.getGeneratedKeys() exception.
November 05, 2004 03:57PM
Re: preparedStatement.getGeneratedKeys() exception.
November 06, 2004 02:19AM
Re: preparedStatement.getGeneratedKeys() exception.
January 03, 2005 09:54PM
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The PreparedStatement interface is a subinterface of Statement. It is used to execute parameterized query.
Let's see the example of parameterized query:
Get Generated Keys From Preparedstatement Windows 10
As you can see, we are passing parameter (?) for the values. Its value will be set by calling the setter methods of PreparedStatement.
Why use PreparedStatement?
Improves performance: The performance of the application will be faster if you use PreparedStatement interface because query is compiled only once.
How to get the instance of PreparedStatement?
The prepareStatement() method of Connection interface is used to return the object of PreparedStatement. Syntax:
Methods of PreparedStatement interface
Farming simulator 17 cd key generator password txt. Putty generate key. The important methods of PreparedStatement interface are given below:
Method | Description |
---|---|
public void setInt(int paramIndex, int value) | sets the integer value to the given parameter index. |
public void setString(int paramIndex, String value) | sets the String value to the given parameter index. |
public void setFloat(int paramIndex, float value) | sets the float value to the given parameter index. |
public void setDouble(int paramIndex, double value) | sets the double value to the given parameter index. |
public int executeUpdate() | executes the query. It is used for create, drop, insert, update, delete etc. |
public ResultSet executeQuery() | executes the select query. It returns an instance of ResultSet. |
Example of PreparedStatement interface that inserts the record
First of all create table as given below:
Get Generated Keys From Preparedstatement 2016
Now insert records in this table by the code given below: