Java Connection getNumeric() method with example


The getNumeric() method of the Connection interface retrieves the list of math functions supported by the current database. The names returned by this method are the Open CLI math function names.

This method returns a String value holding the list of functions separated by commas (",").

To get the list of the numeric functions supported by the underlying database −

  • Make sure your database is up and running.
  • Register the driver using the registerDriver() method of the DriverManager class. Pass an object of the driver class corresponding to the underlying database.
  • Get the connection object using the getConnection() method of the DriverManager class. Pass the URL the database and, user name, password of a user in the database, as String variables.
  • Get the DatabaseMetaData object with respect to the current connection using the getMetaData() method of the Connection interface.

Finally, get the list of numeric functions supported by the underlying database, by invoking the getNumericFunctions() method of the DatabaseMetaData class.

Following JDBC program establishes connection with MySQL database and, retrieves the list of numeric functions supported by the underlying database.

Example

import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.StringTokenizer;
public class DatabaseMetadata_getNumericFunctions {
   public static void main(String args[]) throws SQLException {
      //Registering the Driver
      DriverManager.registerDriver(new com.mysql.jdbc.Driver());
      //Getting the connection
      String url = "jdbc:mysql://localhost/mydatabase";
      Connection con = DriverManager.getConnection(url, "root", "password");
      System.out.println("Connection established......");
      //Retrieving the meta data object
      DatabaseMetaData metaData = con.getMetaData();
      //Retrieving the list of Numeric functions
      String numeric_functions = metaData.getNumericFunctions();
      StringTokenizer tokenizer = new StringTokenizer(numeric_functions, ",");
      while(tokenizer.hasMoreElements()) {
         System.out.println(tokenizer.nextToken());
      }
      System.out.println(" ");
   }
}

Output

Connection established......
ABS
ACOS
ASIN
ATAN
ATAN2
BIT_COUNT
CEILING
COS
COT
DEGREES
EXP
FLOOR
LOG
LOG10
MAX
MIN
MOD
PI
POW
POWER
RADIANS
RAND
ROUND
SIN
SQRT
TAN
TRUNCATE
raja
Published on 15-May-2019 15:36:55
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