sap netweaver programming dylan liu 劉兆宏 sap netweaver technical consultant email&msn:...

SAP NetWeaver Programming

Dylan Liu 劉兆宏

SAP NetWeaver Technical Consultant

Email&MSN: dylan.sap@gmail.comDec 11 2008

SAP NetWeaver Programming

ABAP Performance & Tuning

Graph: Performance and Cause

Architecture of the ABAP Application Server

Access Times to the Sap Buffer and the Database

The Dialog Step

Table Buffering: Types

Database architecture

WAS and Database Architecture

Open SQL Keywords and Their Functions

Keyword Function

SELECT Read data from database tables.

INSERT Insert lines into database tables.

UPDATE Change the contents of lines in database tables.

MODIFYInsert lines into database tables or change the contents of existing lines.

DELETE Delete lines from database tables.

COMMIT WORK

Confirm all changes made in a database logical unit of work (LUW*).

ROLLBACK WORK

Undo all changes in a database LUW.

Rule 1: Keep the Hit List Small

Keep the Hit List Small

Keep the Hit List Small

Keep the Hit List Small: Effects

Rule 2: Minimize the Amount of Transferred Data

Minimize the Amount of Transferred Data

Minimize the Amount of Transferred Data

Minimize the Amount of Transferred Data

Minimize the Amount of Transferred Data

Minimize the Amount of Transferred Data

Minimize the Amount of Transferred Data: Effects

Rule 3: Keep the Number of Round Trips Small

Keep the Number of Round Trips Small

Keep the Number of Round Trips Small

Keep the Number of Round Trips Small

Keep the Number of Round Trips Small

Keep the Number of Round Trips Small

Keep the Number of Round Trips Small: Effects

Rule 4: Keep the Cost of the Search Down

Keep the Cost of the Search Down

Reasonable Index Design

Keep the Cost of the Search Down

Keep the Cost of the Search Down

Keep the Cost of the Search Down

Keep the Cost of the Search Down

Keep the Cost of the Search Down: Effects

Rule 5: Remove the Load From the Database

Remove the Load From the Database

Remove the Load From the Database

Statements that Bypass the Table Buffer

Remove the Load From the Database

Remove the Load From the Database

Remove the Load From the Database

Remove the Load From the Database: Effects

Summary

There is just one database server

Buffers and indices

Try to stick to the presented rules:Small hit listMinimize transfersMinimize number of round tripsNarrow your searchMinimize database load

SAP NetWeaver Programming

NetWeaver Programming: Java

NetWeaver Programming: Java

SAP NetWeaver provides complete support for Java technology:

• Before SAP NetWeaver 7.0: J2EE 1.4

• From SAP NetWeaver CE 7.1: Java EE 5

What is JCo?

SAP's Java middleware, the SAP Java Connector (JCo) allows SAP customers and partners to easily build SAP-enabled components and applications in Java.

JCo supports both inbound (Java calls ABAP) and outbound (ABAP calls Java) calls in desktop and (web) server applications

Jco Examples (1)

Jco Examples (2)

Fundamentals of Web Dynpro

History: Why the name “Web Dynpro”? Dynpro = ”Dynamic program” Dynpro is SAP‘s legacy technology for interactive UIs (R/2, R/3)

programming in ABAP Dynpro‘s are rendered in SAP GUI application

Web Dynpro is to combine: “high interactivity” (= dynamic GUI) and “zero installation” (= ubiquitous GUI, e.g. web browser)

Fundamentals of Web Dynpro

• Minimize coding, maximize design• Separate layout and logic• Support arbitrary backend system• Run on multiple platforms• Support reuse of components• 508 accessibility support

Web Dynpro Java: Design Time

WYSIWYG Editor

Web Dynpro Java: Runtime

SAP NetWeaver Programming

Advice on ABAP career

Questions?