Chat now with support
Chat with Support

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
Tutorials About us Copyright

Right Pane for Analyzers

In the Index Usage Analyzer window, when an Analyzer is selected in the left pane, the following information is displayed in the right pane.

Index Usage Chart (Top right pane)

Displays the total number of indexes in the tables used in all the selected SQL statements and the number of used and unused indexes. Charts the percentage of the indexes that are used by the access plans for the selected SQL statements.

Analysis Information (Bottom right pane)

The detailed information about the Analysis is displayed in the button pages. The buttons for displaying specific information are found at the top of this pane.

Properties button

Displays general information about the analysis, information on the connection used to retrieve the access plans and the SQL statements used in the analysis.

Index Summary button

Displays the indexes that are used by the selected SQL statements in black text and highlights in red the indexes that are not used.

To save a list of all the unused indexes

  1. Right-click and select Save.

  2. In the Save Format window, select Text, HTML, or Excel Convertible (Spreadsheet).

To drop an index

Right-click the line with the index you want to drop and select Drop Index.

 

Right Pane for Tables Analyzed

In the Index Usage Analyzer window, when the Tables Analyzed is selected in the left pane, the following information is displayed in the right pane.

Summary button

Provides a summary of the use of indexes for each table. It gives the total number of SQL that use the table and if the SQL statement accesses the table with a full table scan or uses an index to access the table.

Chart button

Charts the number of SQL statements that use the table.

 

Right Pane for Analyzed Table Information

In the Index Usage Analyzer window, when a table is selected under the Tables Analyzed section is selected in the left pane, the following information is displayed in the right pane.

Prognosis Button

Pane

Function

Description

Top

Summary Information

Displays a summary of the indexes in the table that are used or unused.

Middle

Index Used Information

Displays the indexes used by the SQL statement.

Bottom Left

SQL Text

Displays the text of the SQL statement.

Bottom Right

SQL Information

Displays the access plan, SQL Classification, and the temporary table DDL for the selected SQL statement in the SQL Information pane.

Unused Index Button

Lists the indexes and the key for all indexes in the table that are not used.

To save a list of all the unused indexes

  1. Right-click and select Save.

  2. In the Save Format window, select Text, HTML, or Excel Convertible (Spreadsheet).

To drop an index

Right-click the line with the index you want to drop and select Drop Index.

Table Information Button

Tab

Description

Definition

Displays when and where the table was created.

Columns

Displays the column information for the table.

Index

Displays the index information for the table.

DDL

Displays the DDL for creating the table and indexes.

 

Right Pane for SQL Analyzed Folder

In the Index Usage Analyzer window, when the SQL Analyzed folder is selected in the left pane, the following information is displayed in the right pane.

Index Used

Displays all the SQL statements and shows the tables and indexes used.

 

Related Documents

The document was helpful.

Select Rating

I easily found the information I needed.

Select Rating