Bulk Processing - Inserting Rows Using Collections of Objects

Example Description

• A table is created to store the data (the same table as the previous example).
• An object type as collection element and the collection table type is created.
• The bulk 'FORALL' command inserts all rows at once.
• A timer+counter determines the performance.

Create Table Statement

Table : BULK_PROCESSING_TABLE

create table bulk_processing_table
(
n    number not null,
d    date not null,
s    varchar2(100) not null
);

User Defined Type of Type Object

Object Type Specification : BULK_OBJECT

/**
 * Object type with three fields of number, date and varchar2.
 */
create or replace type bulk_object force as object (
  n   number,
  d   date,
  s   varchar2(100)
);

User Defined Type of Collection of Element Type Object

Collection Table Type : BULK_TABLE_OBJECT

/**
 * Table of object bulk_object
 */
create or replace type bulk_table_object force as table of bulk_object;

PL/SQL Procedure

PL/SQL Function : BULK_COLLECTION_OBJECT

create or replace procedure bulk_collection_object(i_col_object in bulk_table_object)
/**
 * Bulk collection demo with input parameter as a collection of object.
 * 
 * @param i_col_object List of object type values to insert into table 'bulk_processing_table'.  
 */
is
begin
  forall i in 1..i_col_object.count
    insert into bulk_processing_table
      (n,d,s)
      values
      (i_col_object(i).n, i_col_object(i).d, i_col_object(i).s);
end bulk_collection_object;

Factory API : Calling the PL/SQL package

Java Calling Class : BulkCollectionObjectsFactoryApi.java

package plsql_workbench_examples.factoryapi;

import java.sql.Date;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;

import factory.ExamplesRPCFactory;
import plsql_workbench_examples.timer.TimerCounter;
import service.BulkCollectionObjectService;
import transferobject.BulkObject;

public class BulkCollectionObjectsFactoryApi {
  private final static int ELEMENTS = 50000;

  public static void main(String[] args)
  {
    try {
      // set database credentials and configuration parameters
      System.setProperty("dbw_examples.url", "jdbc:oracle:thin:@192.168.0.109:1521/orcl");
      System.setProperty("dbw_examples.username", "dbw_examples");
      System.setProperty("dbw_examples.password", "dbw_examples");

      // getting the service
      BulkCollectionObjectService service = ExamplesRPCFactory.getBulkCollectionObjectService();

      // generating 50000 elements to transfer to the stored procedure 
      List<BulkObject> objectList = new ArrayList<>(ELEMENTS);
      for (int i = 0; i < ELEMENTS; i++) {
        BulkObject o = new BulkObject();
        o.d = new Date(System.currentTimeMillis() + (long) (Math.random() * Integer.MAX_VALUE));
        o.s = UUID.randomUUID().toString();
        o.n = (int) (Math.random() * Integer.MAX_VALUE);
        objectList.add(o);
      }

      // timer to check the throughput
      TimerCounter tc = new TimerCounter();

      // calling the stored procedure
      service.call(objectList);

      // print out throughput
      System.out.println(tc.perSecond("objects bulk performance (first call)", ELEMENTS));

      // calling the stored procedure
      service.call(objectList);

      // print out throughput
      System.out.println(tc.perSecond("objects bulk performance (second call)", ELEMENTS));
    }
    catch (Exception e) {
      e.printStackTrace();
    }
  }
}

Spring API : Calling the PL/SQL package

Java Calling Class : BulkCollectionObjectsSpringApi.java

package plsql_workbench_examples.springapi;

import java.sql.Date;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.support.GenericApplicationContext;
import org.springframework.stereotype.Component;

import plsql_workbench_examples.timer.TimerCounter;
import service.BulkCollectionObjectService;
import transferobject.BulkObject;

@Component
public class BulkCollectionObjectsSpringApi {
  private final static int            ELEMENTS = 50000;

  @Autowired
  private BulkCollectionObjectService bulkCollectionObjectService;

  public static void main(String[] args)
  {
    // set database credentials and configuration parameters
    System.setProperty("dbw_examples.url", "jdbc:oracle:thin:@192.168.0.109:1521/orcl");
    System.setProperty("dbw_examples.username", "dbw_examples");
    System.setProperty("dbw_examples.password", "dbw_examples");

    // Register Spring Beans, Spring Context and call demo method 
    try (GenericApplicationContext ctx = BaseSpringConfig.getCtx(BulkCollectionObjectsSpringApi.class)) {
      ctx.getBean(BulkCollectionObjectsSpringApi.class).runDemo();
    }
  }

  private void runDemo()
  {
    try {
      // generating 50000 elements to transfer to the stored procedure 
      List<BulkObject> objectList = new ArrayList<>(ELEMENTS);
      for (int i = 0; i < ELEMENTS; i++) {
        BulkObject o = new BulkObject();
        o.setD(new Date(System.currentTimeMillis() + (long) (Math.random() * Integer.MAX_VALUE)));
        o.setS(UUID.randomUUID().toString());
        o.setN((int) (Math.random() * Integer.MAX_VALUE));
        objectList.add(o);
      }

      // timer to check the throughput
      TimerCounter tc = new TimerCounter();

      // calling the stored procedure
      bulkCollectionObjectService.call(objectList);

      // print out throughput
      System.out.println(tc.perSecond("objects bulk performance (first call)", ELEMENTS));

      // calling the stored procedure
      bulkCollectionObjectService.call(objectList);

      // print out throughput
      System.out.println(tc.perSecond("objects bulk performance (second call)", ELEMENTS));
    }
    catch (Exception e) {
      e.printStackTrace();
    }
  }
}