Explain Plan Tool
Use the Explain Plan tool to analyze the execution of a single SQL statement. By examining the execution plan, you can see exactly how Oracle executes your SQL statement, and how it can be improved.
This tool lets you:
- generate plans and save them in the table of your choice
- organize your saved plans by various criteria, such as type (for example, online SQL statements, batch SQL statements, and so on), module, or subsystem
- build separate plan tables for different subsystems in your project
- browse each table separately.
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TIP: The Analyze Tool can be used in conjunction with the Explain Plan tool. The Explain Plan Tool does not analyze tables itself prior to executing the Explain Plan, but it does have a toolbar button for manual launch of the Analyze Tool. |
Explain Plan Window
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Generate Plans |
Drag a SQL Statement into the editor on this tab.
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| Browse Saved Plans | Browse previously saved execution plans. | ||||||||||||||||
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Operation Description |
Explain the node selected in the Explain Plan tree. Show how each SQL operation is executed in relation in the Explain Plan. Show / Hide in Generate Plans | Show Description. | ||||||||||||||||
| Plan | The generated execution plan. Click on nodes to expand and collapse them. |
Print the Explain Plan tree
Use File | Print.
The following data is printed:
- The SQL Statement from which the explain plan tree was derived
- Statement ID, Type, Cost and Time stamp
- The Explain Plan tree, including the execution sequence numbers in brackets
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TIP:
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