Lesson Description
Lession - #1137 Hive Drop Table
Drop Table Statement
The syntax is as follows:
DROP TABLE [IF EXISTS] table_name;
The following query drops a table named
employee:
hive> DROP TABLE IF EXISTS employee;
On successful execution of the query, you get to see the following response:
OK
Time taken: 5.3 seconds
hive>
JDBC Program
The following JDBC program drops the employee table.
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 {
// 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
stmt.executeQuery("DROP TABLE IF EXISTS employee;">
;
System.out.println("Drop table successful.">
;
con.close(>
;
}
}
Save the program in a file named HiveDropTable.java. Use the following commands to compile and execute this program.
$ javac HiveDropTable.java
$ java HiveDropTable
Output:
Drop table successful
The following query is used to verify the list of tables:
hive> SHOW TABLES;
emp
ok
Time taken: 2.1 seconds
hive>
