Java ResultSet CONCUR_READ_ONLY
Syntax
ResultSet.CONCUR_READ_ONLY has the following syntax.
static final int CONCUR_READ_ONLY
Example
In the following code shows how to use ResultSet.CONCUR_READ_ONLY field.
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
//from ww w . j ava 2 s.co m
public class Main {
public static void main(String[] args) throws Exception {
Connection conn = getConnection();
Statement st = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,
ResultSet.CONCUR_UPDATABLE);
st.executeUpdate("create table survey (id int,name varchar(30));");
st.executeUpdate("insert into survey (id,name ) values (1,'nameValue')");
st.executeUpdate("insert into survey (id,name ) values (2,null)");
st = conn.createStatement();
ResultSet rs = st.executeQuery("SELECT * FROM survey");
int rsConcurrency = rs.getConcurrency();
if (rsConcurrency == java.sql.ResultSet.CONCUR_READ_ONLY) {
System.out.println("java.sql.ResultSet.CONCUR_READ_ONLY");
} else if (rsConcurrency == java.sql.ResultSet.CONCUR_UPDATABLE) {
System.out.println("java.sql.ResultSet.CONCUR_UPDATABLE");
} else {
// it is an error
}
rs.close();
st.close();
conn.close();
}
private static Connection getConnection() throws Exception {
Class.forName("org.hsqldb.jdbcDriver");
String url = "jdbc:hsqldb:mem:data/tutorial";
return DriverManager.getConnection(url, "sa", "");
}
}
The code above generates the following result.
