How to call a stored procedure using a callable statement in JDBC interpretation?

You can use the CallableStatement interface to call SQL stored procedures. A Callable statement can have input parameters, output parameters, or both.

You can use prepareCall() to create an object of CallableStatement (interface) > Connection method of the interface. This method accepts a string variable representing the query to call the stored procedure and returns a CallableStatement object.

Assuming you have a procedure name myProcedure In the database, you can prepare a callable statement:

//Preparing a CallableStatement
CallableStatement cstmt = con.prepareCall("{call myProcedure(?, ?, ?)}");

Then, you can use the setter method of the CallableStatement interface as a placeholder character, and execute the callable statement using the execute() method as shown below.

cstmt.setString(1, "Raghav");
cstmt.setInt(2, 3000);
cstmt.setString(3, "Hyderabad");
cstmt.execute();

If the procedure has no input values, you can simply prepare the callable statement and execute it as follows:

CallableStatement cstmt = con.prepareCall("{call myProcedure()}");
cstmt.execute();

Example

Assume that there is a name in the MySQL database A table for Dispatches that contains the following data:

+--------------+------------------+------------------+----------------+
| Product_Name | Date_Of_Dispatch | Time_Of_Dispatch | Location       |
+--------------+------------------+------------------+----------------+
| KeyBoard     | 1970-01-19       | 08:51:36         | Hyderabad      |
| Earphones    | 1970-01-19       | 05:54:28         | Vishakhapatnam |
| Mouse        | 1970-01-19       | 04:26:38         | Vijayawada     |
+--------------+------------------+------------------+----------------+

If we create a procedure named myProcedure to retrieve values ​​from this table as follows:

Create procedure myProcedure ()
-> BEGIN
-> SELECT * FROM Dispatches;
-> END //

Example

The following is a JDBC example that uses a JDBC program to call the above stored procedure.

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
public class CallingProcedure {
   public static void main(String args[]) throws SQLException {
      //Registering the Driver
      DriverManager.registerDriver(new com.mysql.jdbc.Driver());

      //Getting the connection
      String mysqlUrl = "jdbc:mysql://localhost/sampleDB";
      Connection con = DriverManager.getConnection(mysqlUrl, "root", "password");
      System.out.println("Connection established......");

      //Preparing a CallableStateement
      CallableStatement cstmt = con.prepareCall("{call myProcedure()}");

      //Retrieving the result
      ResultSet rs = cstmt.executeQuery();
      while(rs.next()) {
         System.out.println("Product Name: "+rs.getString("Product_Name"));
         System.out.println("Date of Dispatch: "+rs.getDate("Date_Of_Dispatch"));
         System.out.println("Time of Dispatch: "+rs.getTime("Time_Of_Dispatch"));
         System.out.println("Location: "+rs.getString("Location"));
         System.out.println();
      }
   }
}

Output

Connection established......
Product Name: KeyBoard
Date of Dispatch: 1970-01-19
Time of Dispatch: 08:51:36
Location: Hyderabad

Product Name: Earphones
Date of Dispatch: 1970-01-19
Time of Dispatch: 05:54:28
Location: Vishakhapatnam

Product Name: Mouse
Date of Dispatch: 1970-01-19
Time of Dispatch: 04:26:38
Location: Vijayawada

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