EXPLAIN tables contain information about SQL statements and functions that run on Db2 for z/OS®. You can create and maintain a set of EXPLAIN tables to capture and analyze information about the performance of SQL statements and functions that run on Db2 for z/OS. Each row in an EXPLAIN table describes some aspect of a step in the execution of a

Apr 16, 2012 SYSPACKAGE (z/OS)). Finally, there is a last piece that allows our programs to reunite with their packages, the PLAN . You create a plan by

The Explain facility allows you to report on the access path DB2 will Explanation on DB2 Explain. When an SQL is executed against or bound to a DB2 database, DB2 Optimizer tool defines the access path used to access the Learn how the Real Time Statistics Advisor feature identifies DB2 z/OS objects in need of maintenance in version 5 of Toad for DB2. Jan 26, 2021 Db2 for z/OS AI for Version 1 3 · How to move tables from multi-table table spaces … · IBM Db2 AI for zOS - Better Smarter Faster · IBM Watson Here are several DB2 resources for Database Administrators. There are great blogs, PDFs and even DB2 10 for z/OS Performance Topics. An IBM Redbooks Explain DB2 concepts, terminology and components; SELECT rows of data from DB2 tables using the WHERE clause to retrieve specific rows; Format QMF Db2 SQL Debug - execute and explain SQL inside application programs; Db2 Query Build - build complicated SQL SELECT statements; Db2 Catalog Guide - Query Workload Tuner for Db2 z/OS Expert Advice on query and workload performance for Db2 for z/OS Develop, Run SQL scripts, EXPLAIN and Tune.

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Db2 12 for z/OS •Upgrade EXPLAIN tables to Db2 12 for z/OS format (should be at least Db211for z/OS version) –Can be done in Db211for z/OS NFM with fallback SPE applied –Use of sample batch job DSNTIJXA with REXX DSNTXTA can help

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An Introduction to SQL Tuning for aDB2 for z/OS EnvironmentWillie FaveroData Warehouse on System z Swat Team (DB2 SME)Session #8762Tuesday, March 1, 2011: 3:00… If you are using Data Studio, it can create the explain tables for you. You can utilize Db2 supplied stored procedure ADMIN_EXPLAIN_MAINT to create and maintain the explain tables in the correct format. The DB2 command line processor can be executed through Unix Systems Services to call the stored procedure.
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There are great blogs, PDFs and even DB2 10 for z/OS Performance Topics. An IBM Redbooks Explain DB2 concepts, terminology and components; SELECT rows of data from DB2 tables using the WHERE clause to retrieve specific rows; Format QMF Db2 SQL Debug - execute and explain SQL inside application programs; Db2 Query Build - build complicated SQL SELECT statements; Db2 Catalog Guide - Query Workload Tuner for Db2 z/OS Expert Advice on query and workload performance for Db2 for z/OS Develop, Run SQL scripts, EXPLAIN and Tune. Jul 12, 2010 Do you use EXPLAIN output when you're analyzing the performance of a query in a DB2 for z/OS environment? I hope so. If you do, you might Important It is best to convert EXPLAIN tables to Db2 11 format during migration, table space types, see Table space types and characteristics in Db2 for z/OS.

Issue/Introduction. The EXPLAIN parameter controls whether control cards are generated and written to a sequential file for the SQL that matches the filtering and selection criteria you have specified.
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Understand new EXPLAIN capabilities, added in DB2 10 and 11, and “IBM DB2 11 for z/OS Performance Topics” (redbook), SG24-8222-0. “DB2 11 for z/OS

In recent weeks, however, I discovered that there is some lack of awareness of EXPLAIN enhancements delivered through more recent versions of Db2 - specifically, Db2 Version 8, Db2 10 and Db2 12. DB2 10 for z/OS Explain Table Conversion required! Each new release of DB2 introduces new columns or modifies existing columns in the EXPLAIN tables.

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–Any level of Db2 Connect drivers should work with Db2 12 for z/OS, both before and after new function is activated with no behavior change –Data server clients and drivers must be at the following levels to exploit Db2 for z/OS function-level application compatibility of Db2 for z/OS FL=V12R1M501or greater:

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RUG 2006-01-24--25. ©Peter Backlund DB2-Konsult AB. Sida 2. Terry Purcell – IDUG Berlin 2005. • Tune SQL like an expert in DB2 for z/OS V8. – Runstats Checking SQL efficiency using EXPLAIN and operational tracing tools like IIDR (Info Sphere Data Replication for DB2 for z/OS) and Customization of the Verktyg (Db2 z / OS) — som styr åtkomst till resurserna för arbete på az / OS. Visual Explain: Verktyg för att visa åtkomstvägen för DB2 RUG 2004 DB2 Utvecklingshjälpmedel för z/os Hasse Högman - SEB IT för behörighetsid P-T ACTION ===> ROLLBACK Skall explain sparas på P-T Loggning och auditing i DB2 + lite DB2 för z/OS v8 erfarenheter.

2007-12-13 CA RC/Query for DB2 for Z/OS : Quick Explain -206, ERROR: FUNCTION_LVL IS NOT VALID IN THE CONTEXT WHERE IT IS USED book Article ID: 204424. calendar_today Updated On: Products. CA Plan Analyzer for DB2 for z/OS CA Database Management for DB2 for z/OS - Performance Suite CA RC/Query for DB2 for z/OS.