DROP TABLE [IF EXISTS] table_name;

hive> DROP TABLE IF EXISTS employee;

OK
Time taken: 5.3 seconds
hive>

import java.sql.SQLException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import java.sql.DriverManager;

public class HiveDropTable {

   private static String driverName = "org.apache.hadoop.hive.jdbc.HiveDriver";

   public static void main(String[] args) throws SQLException {

      // 注册驱动程序并创建驱动程序实例
      Class.forName(driverName);

      // 获取连接
      Connection con = DriverManager.getConnection("jdbc:hive://localhost:10000/userdb", "", "");

      // 创建语句
      Statement stmt = con.createStatement();

      // 执行语句
      stmt.executeQuery("DROP TABLE IF EXISTS employee;");
      System.out.println("删除表成功。");

      con.close();
   }
}

$ javac HiveDropTable.java
$ java HiveDropTable

删除表成功

hive> SHOW TABLES;
emp
ok
Time taken: 2.1 seconds
hive>