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? I'm using version 2.0.13 of mmmysql.The change log says Rudimentary version of Statement.getGeneratedKeys from JDBC-3.0 now implemented (you need to be using JDK-1.4 for this to work, I believe) I've previously found it works with java.sql.Statement but not with java.sql.PreparedStatement. From the change log it looks like he hasn't yet implemented getGeneratedKeys for PerparedStatements.
- Returns a new instance of PreparedStatement that may be used any number of times to execute parameterized requests on the database server.
- Hi guys, I am writing a Java Webdynpro application that has alot of interaction with an SQL Server 2005 Database. All is going fine but now I am trying to get the GENERATED KEY of a record after an INSERT. The database table I am inserting into does.
- 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.
Date: November 04, 2004 04:07PM
thanks
- alex
-------------------------------------------------------------------
pstmt = conn.prepareStatement(psqlstmt,Statement.RETURN_GENERATED_KEYS);
// populate the '?' parameters in PreparedStatement [pstmt].
for (int i=0; i < data.length; i++)
{
System.out.println('pstmt.setObject('+(i+1)+','+ data + ')');
pstmt.setObject(i+1, data);
}
pstmt.execute();
resultSet = pstmt.getGeneratedKeys();
if (resultSet != null && resultSet.next())
{
newid = resultSet.getInt(1);
resultSet.updateInt(1, newid+1);
System.out.println('newid = ' + newid);
}
else
{
System.out.println('resultset is NULL.');
}
-------------------------------------------------------------------
com.mysql.jdbc.NotUpdatable: Result Set not updatable.This result set must come from a statement that was created with a result set type of ResultSet.CONCUR_UPDATABLE, the query must select only one table, and must select all primary keys from that table. See the JDBC 2.1 API Specification, section 5.6 for
more details.
How do I use both preparedstatement and CONCUR_UPDATEABLE? java.sql.Connection only supports 2 prepareStatement() API for using getGeneratedKeys() and it does not provide a way to specify the ResultSet type like createStatement() call.
-alex
Java Preparedstatement Get Sql String
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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:
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
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:
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Now insert records in this table by the code given below: