Visit the SAP Forum

Languages : English | Dutch | French | Portugese | Italian



INTERVIEW EBOOK
Get 30,000 Interview Questions & Answers in an eBook.

Interview Success Kit - Get Success in Job Interviews



Send your Resume to 6000 Companies
START YOUR WEBSITE
India's Best Web Hosting Company

What is use of using HASHED TABLE?




"What is use of using HASHED TABLE? 

Hashed table is useful when your have to work with very big internal table and to read it with 
"READ TABLE WITH KEY ..." 

The time access is constant ! 

Definition of a Hashed Table: 
"Defines the table as one that is managed with an internal hash procedure. You can imagine a hashed table as a set, whose elements you can address using their unique key. Unlike standard and sorted tables, you cannot access hash tables using an index. All entries in the table must have a unique key. 




Access time using the key is constant, regardless of the number of table entries. 

You can only access a hashed table using the generic key operations or other generic operations (SORT, LOOP, and so on). Explicit or implicit index operations (such as LOOP ... FROM to INSERT itab within a LOOP) are not allowed." 

As long as your records has unique key(s), using hash table will give you a huge performance gain when dealing with large dataset. assuming in your case, 10000 record , and if the key is unique, use hash table.  The main use of hash tables is for looking up fixed information from a key. So if you have a report that has personnel number and you want to display their name, you could use a hash table. 

Thus: 
Code: 

types: begin of typ_pernr, 
         pernr  like pa0001-pernr, 
         ename  like pa0001-ename, 
       end   of typ_pernr. 
data: ls_pernr  type typ_pernr, 
      lt_pernr  type  hashed table of typ_pernr  with unique key pernr. 
... 
  select pernr ename into table lt_pernr  from pa0001. 
... 
  loop at itab. 
    read table lt_pernr  with table key pernr  =  itab-pernr 
         into ls_pernr. 
    write: ls_pernr-ename, itab-data. 
  endloop. 

A D V E R T I S E M E N T

A D V E R T I S E M E N T

S A P - R E S O U R C E S


Get Free SAP Resources:

Are you looking for:
  • SAP Jobs
  • Free SAP eBooks
  • SAP Softwares
  • SAP Tutorials
  • ERP Implementation Examples
Enter Email Address:
(Enter your email address above and we will instantly send you the download link to you, when you confirm your email.)
Search SAP Resources:
discussionDiscussion Center
Discuss
Discuss

Query

Feedback
Yahoo Groups
Y! Group
Sirfdosti Groups
Sirfdosti
Contact Us
Contact
Sign in

User Name:
Password:
Forget password? | Register


INTERVIEW EBOOK

Get 30,000 Interview Questions & Answers in an eBook.

Interview Success Kit - Get Success in Job Interviews


Send your Resume to 6000 Companies

SAP Resources

  • SAP Articles
  • SAP Books
  • SAP Certifications
  • SAP Companies
  • SAP Study Materials
  • SAP Events
  • SAP Faqs
  • SAP Jobs
  • SAP Job Consultants
  • SAP Links
  • SAP News
  • SAP Sample Papers
  • SAP Interview Questions
  • SAP Training Institutes
  •  
    SAP Tutorial

  • Introduction
  • SAP History
  • SAP Facts
  • SAP Tables
  • SAP Function
  • SAP Report
  • Reasons To Use SAP
  • SAP Landscape
  • SAP Transaction Code
  • SAP Lotus Notes Integration
  • Business Connector and XML
  • Enterprise Release 4.7

  • SAP Training Institutes

  • SAP Training Institutes
  • Job Consultants Address
  • SAP Companies Address

  • Business Process Cycle

  • Analyze
  • Design
  • Implement
  • Operate
  • Optimize
  • Skills And Education

  • Logistics Module

  • Sales and Distribution
  • Quality Management
  • Materail Management
  • Plant Maintenance
  • Financial Modules (FI/CO)
  • Project system
  • Production Planning
  • Service Management

  • SAP NetWeaver

  • Introduction
  • Object Model
  • Interoperability
  • Creating Web Apps
  • Java Connector
  • Advantages & Conclusion
  • Life Cycle Management
  • Composite Application Framework

  • SAP Tools

  • SQL Trace Tool
  • SAP CRM
  • SAP SRM
  • SAP SCM
  • SAP ERP
  • SAP BW

  • SAP Modules

  • SAP FI Module
  • SAP CO Module

  • SAP Technical

  • SAP ITS Architecture
  • Financial Management
  • Manufacturing Planning and Execution
  • Customer Order Management
  • Lackbox Processing
  • SD and Financial Accounting Integration
  • SAP - HR (Human Resource)

  • SAP Miscellanous

  • Web Application Server(WAS)
  • Data Archiving
  • Mobile Engine
  • SAP Script
  • SAP Transactions
  • SAP Business Warehouse(BW)

  • SAP Reference

  • SAP Facts
  • SAP Tables
  • SAP Function
  • SAP Report
  • SAP Landscape

  • SAP Others

  • SAP Treasury
  • SAP Finance
  • SAP WAS
  • SAP Data Archiving
  • SAP ALE
  • SAP EDI
  • SAP Exchange
  • SAP X-APPS
  • SAP Applications Components
  • SAP Software
  • Dunning
  • SAP IDES
  • SAP Payroll Basics
  • SAP BASIS and Security Authorization
  • SAP Backup
  • SAP Router

  • ABAP Tutorials

  • Introduction
  • ABAP Transaction
  • ABAP Function
  • ABAP File Processing
  • ABAP Objects
  • ABAP Syntax
  • ABAP Queries
  • SAPMail Using ABAP
  • ABAP Programming Hints

  • SAP Projects & Codes

  • Finding the user-exits
  • Purchase Order Display
  • Batch Input
  • Dynamic Open SQL
  • Creating Extract Dataset
  • Reading database tables
  • Load table from a UNIX file
  • Create subscreen

  • SAP Resources

  • SAP Books
  • SAP Links

  • Interview Question



  • Common Interview Que.
  • ABAP Interview Que.
  • ERP Interview Que.
  • HR Interview Que.
  • MM Interview Que.
  • PP Interview Que.
  • ALE Interview Que.
  • EDI Interview Que.
  • Basis Interview Questions
  • SAP-SD Interview Questions
  • FI&CO Interview Questions
  • BW Interview Questions
  • CRM Interview Questions
  • Interview Questions

  • Careers at SAP

  • Careers in SAP (SAP Jobs)
  • Advertise
  •