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我進入DW測試並需要比較源數據到目標數據。源數據存儲在hive/RDBMS中,而目標數據加載到Hbase中。我是Hbase的新手。任何人都可以幫助我採取我可以採取的方法。我正在尋找的是與「MINUS」類似的功能。可能嗎 ?Hive與表中數據的比較
我進入DW測試並需要比較源數據到目標數據。源數據存儲在hive/RDBMS中,而目標數據加載到Hbase中。我是Hbase的新手。任何人都可以幫助我採取我可以採取的方法。我正在尋找的是與「MINUS」類似的功能。可能嗎 ?Hive與表中數據的比較
你應該寫Java文件中,可以組合:
HBase:
import java.io.IOException;
// HBASE
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.util.Bytes;
public class RetriveData{
public static void main(String[] args) throws IOException, Exception{
// Instantiating Configuration class
Configuration config = HBaseConfiguration.create();
// Instantiating HTable class
HTable table = new HTable(config, "emp");
// Instantiating Get class
Get g = new Get(Bytes.toBytes("row1"));
// Reading the data
Result result = table.get(g);
// Reading values from Result class object
byte [] value = result.getValue(Bytes.toBytes("personal"),Bytes.toBytes("name"));
byte [] value1 = result.getValue(Bytes.toBytes("personal"),Bytes.toBytes("city"));
// Printing the values
String name = Bytes.toString(value);
String city = Bytes.toString(value1);
**// CALL THE HIVE CLASS(HiveQLOrderBy)...YOU CAN COMPARE**
System.out.println("name: " + name + " city: " + city);
}
}
//HIVE
import java.sql.SQLException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import java.sql.DriverManager;
public class HiveQLOrderBy {
private static String driverName = "org.apache.hadoop.hive.jdbc.HiveDriver";
public static void main(String[] args) throws SQLException {
// Register driver and create driver instance
Class.forName(driverName);
// get connection
Connection con = DriverManager.getConnection("jdbc:hive://localhost:10000/userdb", "", "");
// create statement
Statement stmt = con.createStatement();
// execute statement
Resultset res = stmt.executeQuery("SELECT * FROM employee ORDER BY DEPT;");
System.out.println(" ID \t Name \t Salary \t Designation \t Dept ");
while (res.next()) {
System.out.println(res.getInt(1) + " " + res.getString(2) + " " + res.getDouble(3) + " " + res.getString(4) + " " + res.getString(5));
}
con.close();
}
}
感謝@R Palanivel,但我從上面的Java文件不解的是,它會單獨打印從HBase的表和蜂巢結果那麼將不得不手動比較它。如果我錯了,請糾正我。到目前爲止,我還沒能實現它。請建議。 –