Before reading this article I’ll recommend you to read : JDBC - What is ResultSet in java - Types, concurrency, holdability of ResultSet in java
Program to use insertRow() when CONCUR_UPDATABLE ResultSet concurrency is used in java
CONCUR_UPDATABLE - CONCUR_UPDATABLE mode means ResultSet object can be read and updated (means inserting row in ResultSet object) as well.
About moveToInsertRow(), updateString() and insertRow() methods >
- moveToInsertRow() method moves the cursor to the insert row. The current cursor position is remembered while the cursor is positioned on the insert row. The insert row is a special row associated with an updatable result set. It is essentially a buffer where a new row may be constructed by calling the updater methods prior to inserting the row into the result set.
- updateString() method does not update underlying database
- inserting row in resultSet using insertRow() method inserts row in underlying database as well.
- If in case we are working in transaction where autoCommit is set to false, then it will insert row in underlying database when transaction is committed using connection.commit().
--Before executing java program execute these database scripts >
create table EMPLOYEE(ID number(4),NAME varchar2(22));
insert into EMPLOYEE values(1, 'ankit');
insert into EMPLOYEE values(2, 'rohit');
insert into EMPLOYEE values(3, 'amy');
commit;
--If table already exists then execute the DROP command >
drop table EMPLOYEE;
EMPLOYEE table will look like this >
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
/** Copyright (c), AnkitMittal JavaMadeSoEasy.com */
public class CONCUR_UPDATABLE_ResultSetConcurrency_insert {
public static void main(String... arg) {
Connection con = null;
PreparedStatement prepStmt = null;
ResultSet rs = null;
try {
// registering Oracle driver class
Class.forName("oracle.jdbc.driver.OracleDriver");
// getting connection
con = DriverManager.getConnection(
"jdbc:oracle:thin:@localhost:1521:orcl",
"ankit", "Oracle123");
System.out.println("Connection established successfully!");
//ResultSet concurrency = CONCUR_UPDATABLE
prepStmt = con.prepareStatement("select NAME from EMPLOYEE",
ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
rs = prepStmt.executeQuery();
System.out.println("CONCUR_UPDATABLE - "+rs.getConcurrency()); //1008 is CONCUR_READ_ONLY
System.out.println("\nLet's display all records >");
while (rs.next()) {
System.out.println(rs.getString("NAME"));
}
rs.moveToInsertRow();
rs.updateString("NAME", "ankitNew"); //updateString() method does not update underlying database
//inserting row in resultSet using insertRow() method inserts row in underlying database as well.
//If in case we are working in transaction where autoCommit is set to false then it will insert row in underlying database when transaction is committed using connection.commit().
rs.insertRow();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
finally{
try {
if(rs!=null) rs.close(); //close resultSet
if(prepStmt!=null) prepStmt.close(); //close PreparedStatement
if(con!=null) con.close(); // close connection
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
/*OUTPUT
Connection established successfully!
CONCUR_UPDATABLE - 1008
Let's display all records >
ankit
rohit
amy
*/
|
After execution of above program EMPLOYEE table will look like this >
