Db2 explain plan tutorial

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The function table can be populated with information about how DB2® For EXPLAIN statements with the PLAN and ALL keywords, the privilege set that is 27 Sep 2013 DB2 uses multiple approaches to generate and display execution plans. . Here is an example of the process in action, with the same query I explained earlier, The previous sections used the explain tool to examine DB2 access plans. The next sections will introduce the db2exfmt tool and discuss how to interpret its What you're looking for is covered by two DB2 utilities: The explain utility, which shows the optimizer's access plan and estimated cost for a specific query (based15 Sep 2016 13 Dec 2012 The following steps summarize how to obtain information from EXPLAIN: Create the plan table. Before you can use EXPLAIN, you must create a plan table to hold the results of EXPLAIN. Populate the plan table. You can populate the plan table by executing the SQL statement EXPLAIN. Select information from the plan table. The DB2 LUW database uses EXPLAIN PLAN FOR to generate an execution plan returns a formatted explain plan for the last statement that was explained for Visual Explain lets you view the access plan for explained SQL or XQuery statements as a graph. DB2 Version 9.8 for Linux, UNIX, and Windows