DB2 for z/os: Programmer Essentials for Designing, Building and Tuning

Transcription

1 Brett Elam - DB2 for z/os: Programmer Essentials for Designing, Building and Tuning April 4, 2013 DB2 for z/os: Programmer Essentials for Designing, Building and Tuning Information Management

2 Disclaimer and Trademarks Information contained in this material has not been submitted to any formal IBM review and is distributed on "as is" basis without any warranty either expressed or implied. Measurements data have been obtained in laboratory environment. Information in this presentation about IBM's future plans reflect current thinking and is subject to change at IBM's business discretion. You should not rely on such information to make business plans. The use of this information is a customer responsibility. IBM MAY HAVE PATENTS OR PENDING PATENT APPLICATIONS COVERING SUBJECT MATTER IN THIS DOCUMENT. THE FURNISHING OF THIS DOCUMENT DOES NOT IMPLY GIVING LICENSE TO THESE PATENTS. TRADEMARKS: THE FOLLOWING TERMS ARE TRADEMARKS OR REGISTERED TRADEMARKS OF THE IBM CORPORATION IN THE UNITED STATES AND/OR OTHER COUNTRIES: AIX, AS/400, DATABASE 2, DB2, e-business logo, Enterprise Storage Server, ESCON, FICON, OS/390, OS/400, ES/9000, MVS/ESA, Netfinity, RISC, RISC SYSTEM/6000, System i, System p, System x, System z, IBM, Lotus, NOTES, WebSphere, z/architecture, z/os, zseries The FOLLOWING TERMS ARE TRADEMARKS OR REGISTERED TRADEMARKS OF THE MICROSOFT CORPORATION IN THE UNITED STATES AND/OR OTHER COUNTRIES: MICROSOFT, WINDOWS, WINDOWS NT, ODBC, WINDOWS 95 For additional information see ibm.com/legal/copytrade.phtml

3 December 2012 Data Studio 3.2 Announcement Data Studio now a single package, no more Full versus Administration client. Eclipse base Installation Manager installation with more installation possibilities to tailor features and size of footprint, and is still available at no charge. New option possibilities: Query focus on catalog navigation and query editor Admin focus on object management and utilities Develop Stored procedures/routine development and debugging Query Tuning Available in 32 or 64 Bit support Data Studio Home Page: 3

4 Data Studio V3.2

5 Data Studio 32 or 64 Bit Deployment Option

6 Customized Installation and Footprint Size For Details See:

7 Installation Footprint Full install: 1.5GB and minimum install: 499MB

8 IBM Data Studio IBM Data Studio provides extensible database development and administration support for the DB2 and Informix family of products Eclipse-based tool set No client or DB2 Connect software needed Restricted use type-4 Java driver included to connect to DB2 z/os Provides database management capabilities for DB2 LUW and z/os, Oracle, MySQL, SQL Server, Sybase, Informix, etc. Query building and editing Automatic DDL Generation Stored Procedures and UDF development wizards Create, Test, Debug, Deploy the routines Web Service creation wizards In order to expose database operations to client applications (SQL SELECT and DML statements, XQuery expressions, call SPs) Replacement for DB2 Control Center 8

9 Fast Up and Running Select lifecycle Launch key tasks Access tutorials and advice 9

10 Perspectives Database Projects Editor Database Meta Data View Output View 10

11 More Flexible Navigation True hierarchy Server -> Database Name filtering More filtering and customization Fast filtering Show menu Save customizations Better context menus Add columns to object list (LUW) 11

12 Some of Data Studio Abilities Create Table Space 12

13 Create a Table 13

14 Viewing Entity Relationships InfoSphere Data Architect (Viewer) 14

15 Generate DDL 15

16 Add some data to a table 16

17 Follow instructions to select table and column 17

18 Support for the XML data type 18

19 Data Studio Includes Optim Database Administrator for DB2 LUW Automate and script structural database changes to help DBAs better manage test databases and speed deployments and streamline overall administrative tasks. Compare and handle forward and reverse schema engineering between models, the database, and DDL. Perform extended alters that require dropping and re-creating tables and managing data preservation. Facilitate impact analysis and dependency analysis to mitigate change risk. Migrate database objects, data, and privileges and generate maintenance utility commands. Document and report on proposed and completed changes for collaboration and audit. Manage large environments with large volumes of objects more efficiently by taking advantage of the overall scalability and performance enhancements. 19

20 Database Administration Perspective and Administration Explorer is the workbench 20

21 Sample of Features Database Management 21

22 Sample of Features Table Management 22

23 Sample of Features Data Movement 23

24 Data Studio Includes the Query Tuner Client for DB2 LUW and z/os Optim Query Workload Tuner is now activated by a key in the database now, no need to install additional workstation software Query tuning You can tune single queries with several features that are incorporated from Optimization Service Center for DB2 for z/os, which is now deprecated. These new features are supported on either DB2 for Linux, UNIX, and Windows or DB2 for z/os: 24 Supported query tuning features for DB2 for z/os and LUW: Capture queries from all data sources that Optimization Service Center for DB2 for z/os supports and from XML files that are exported from DB2 Query Monitor for z/os. View formatted queries. View access plan graphs. Capture information about the data server that queries run against, a feature which corresponds to Service SQL in Optimization Service Center for DB2 for z/os. Generate reports on the performance of queries. Run the Query Statistics Advisor to analyze the statistics that are available for the data that a query accesses, check for inaccurate, outdated, or conflicting statistics, and look for additional statistics that you might capture to improve how the data server processes the query. Query Sources: Text, Statement Cache, Plans/Packages, QMF, Files, Plan Table, Data Studio Objects

25 IBM Data Studio Visual Explain Several options to Right click on Open Visual Explain 25

26 Visual Explain Access Plan diagram and navigator Tip: Red lines around boxes around tables and indexes indicate missing statistics 26

27 Query Costing is available 27

28 Data Studio - Query Tuning Interface Many SQL sources 28

29 Data Studio Provides a subset of Optim Query Workload Tuner s features 29

30 Data Studio Additional ways to launch Query Tuner from the GUI 30

31 Data Studio filtering is available for the Dynamic Statement Cache 31

32 Data Studio Query Tuning: Statistics Advisor 32

33 Data Studio Query Tuning: Formatted query after Optimizer rewrite 33

34 Data Studio Query Tuning: Access Plan Graph 34

35 Data Studio Query Tuning: Summary Report 35

36 Data Studio Query Tuning: Access Plan Report 36

37 Optim Query Workload Tuner for purchase Optimize performance Reduce costs Increase overall system capacity Simplify analysis for DBAs, developers, designers, and others Reduce time to respond Development Environment Tune SQL pre-production while costs and impact are low Production Environment Optimize workload for peak performance Identify query candidates from numerous sources DB2 catalog Dynamic statement cache Data Studio hot spots Query or performance monitors Get expert tuning advice Improve query design Get recommendations regarding how to rewrite the query for better efficiency Improve statistics quality Get recommendations on the best statistics to capture to influence access path selection Improve index design Get recommendations on additional indexes that can reduce database scans View the effects of dropping indices Analyse Access Plans Visualize access path Assess access path stability to reduce risk of performance regression Eclipse based Allows for shell sharing with other tools 37

38 IMS Enterprise Suite Explorer for Development A recent addition

39 IMS Enterprise Suite Explorer for Development Requirements Use with 32-Bit Data Studio Version 3.2 Only

40 IMS Enterprise Suite Explorer for Development Shell Share with Data Studio

41 IMS Enterprise Suite Explorer z/os Editor and SDSF Display Cool tool. PDS & Dataset List zos Editor SDSF Held Output

42 DB2 9 for z/os has two types of SQL Stored procedures SQL Procedural Language or SQL PL External SQL procedures: This is what we know and love before DB2 9 for z/os Generated C program which runs in a WLM environment Native SQL procedures: The SQL procedure logic runs in the DBM1 address space Extensive support for versioning: VERSION keyword on CREATE PROCEDURE CURRENT ROUTINE VERSION special register ALTER ADD VERSION ALTER REPLACE VERSION ALTER ACTIVATE VERSION BIND PACKAGE with new DEPLOY keyword FOR Statement - Executes one or multiple statements for each row of a table. Statements within the FOR are executed for each row selected Compound SQL statements - A compound statement contains a block of SQL statements and declarations for SQL variables, cursors, and condition handlers. Native SQL procedures support ziip Processors with DRDA SQL Unified Debugger support for Java and SQL-PL BIND PACKAGE with new DEPLOY keyword 42

43 Upward compatibility External SQL procedures will continue to work in V9 either in CM or NFM External SQL procedures can continue to be created in V9 NFM CREATE PROCEDURE... FENCED or EXTERNAL keyword required Native SQL procedures can be created starting in V9 NFM CREATE PROCEDURE... (FENCED or EXTERNAL keyword not used) Both native and external SQL procedures can be called in V9 in NFM 43

44 SQL PL / Generated C Implementation in V8 or V9 External Stored Procedures WLM //STEPLIB DD SP1 Load module Appl pgm CALL SP1 DB2 DBM1 SP1 pkg EDM pool WLM SP1 logic (load module) or DDF Appl pgm CALL SP1 DB2 directory SP1 pkg 44

45 SQL PL Native Stored Procedure Execution in V9 Appl pgm CALL SP1 DB2 DBM1 DDF Appl pgm SP1 SQL PL native logic SQL SQL or CALL SP1 EDM pool DB2 directory SP1 SQL PL native logic SQL SQL 45

46 Comparison of External and Native Stored Procedures Redbook DB2 9 for z/os Performance Topics SG

47 New Template-based Routine Creation Name procedure Faster Easier Compliant Select Template Preview template 47

48 Stored Procedure Edit / Customize 48

49 Stored Procedure Deployment 1. Select stored procedure for deployment 49

50 Stored Procedure Deployment 2. Customize deployment options Specify target database Specify target schema Specify how to handle duplicates Specify default path 50

51 Stored Procedure Deployment 3. Customize precompiled options Options for z/os Options for LUW 51

52 Stored Procedure - Run Run executes a call of the stored procedure Asks for input parameters values View result set Customize run settings 52

53 Preparing for Debugging 1. Deploy stored procedure with "Enable debugging" 2. Select stored procedure for Debug 53

54 Debug Perspective terminate step into step over variables resume current value current location step return right click to change value break point 54

55 Debug Perspective Breakpoints Clicking resume will stop at next break point All breakpoints in this session Debugger stops at line 11 55

56 Useful information on Data Studio and Stored Procedures Unified Debugger & Session Manger Setup on z/os Favorite! Data Studio and DB2 for z/os Stored Procedures Redbook on Stored Procedures 56

57 The main place for all documentation is InfoCenter 0.doc/src/alltoc/db2z_10_prodhome.htm 57

58 DB2 LUW Information Centers bm.db2.luw.common.doc/doc/t html 58

59 Data Studio s Information Center 59

60 The End! 60