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SQL Optimizer for DB2 LUW 4.3.1 - User Guide

SQL Optimizer for IBM® DB2® LUW
About SQL Optimizer for IBM DB2 LUW Getting Started Options SQL Scanner SQL Optimizer SQL Formatter SQL Inspector Database Explorer SQL Repository Index Impact Analyzer Index Usage Analyzer User-Defined Temp Table Editor Functions SQL Functions SQL Information and Functions Activity Log
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Scan Database Objects

The SQL statements in the DDL for a database object can be scanned in the SQL Scanner to classify the SQL statements to help identify which SQL statements are likely to be causing performance problems.

To scan the DDL for a database object from the Database Explorer window

  1. In the left pane, right-click the database object name and select Scan.
  2. If the Job Manager window is opened, then the selected database object is added as a job in the window and the scanning starts automatically. If the Job Manager window is not open, the Group Manager window is opened for you to select or create a Job Group first.


Database Explorer Functions

Below is a list of available functions within the Database Explorer window.

Button or Menu


Edit Menu


Send to SQL Rewrite

Edit Menu


Send to Generate Indexes

Right-click Menu


Right-click Menu

Copy columns to SQL Optimizer

Right-click Menu

Copy columns to SQL Formatter

Data Tab

Modifying Data


SQL Repository

Quest SQL Optimizer for IBM® DB2® LUWmaximizes SQL performance by automating the manual, time-intensive and uncertain process of ensuring that SQL statements are performing as fast as possible. SQL Optimizer analyzes, rewrites, and evaluates SQL statements within multiple database objects, files, or SQL statements captured by the DB2 Event Monitor. With SQL Optimizer, you can analyze and optimize all your problem SQL from multiple sources. SQL Optimizer also provides you a complete index optimization and plan change analysis solution, from index recommendations to simulated index impact analysis, through comparison of multiple SQL access plans.

SQL Optimizer provides you with the following main modules.

SQL Optimizer (including SQL Rewrite and Generate Indexes functions)

SQL Formatter

Database Explorer

SQL Scanner

SQL Inspector

SQL Repository

Index Impact Analyzer

Index Usage Analyzer


About SQL Repository

The SQL Repository stores the SQL statements that are used in the analysis of database performance. These may be SQL statements that you have identified as critical to the performance of your database application.

The SQL Repository is stored in a file directory that can be accessed by your computer, either a directory on your local computer or a network drive. This directory is specified in the Options settings.


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