sap netweaver programming dylan liu 劉兆宏 sap netweaver technical consultant email&msn:...
TRANSCRIPT
SAP NetWeaver Programming
Dylan Liu 劉兆宏
SAP NetWeaver Technical Consultant
Email&MSN: [email protected] 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?