Where is explain plan stored in Oracle?

By Other

Where is explain plan stored in Oracle?

The explain plan process stores data in the PLAN_TABLE . This table can be located in the current schema or a shared schema and is created using in SQL*Plus as follows.

What privileges needed for explain plan?

To issue an EXPLAIN PLAN statement, you must have the privileges necessary to insert rows into an existing output table that you specify to hold the execution plan. You must also have the privileges necessary to execute the SQL statement for which you are determining the execution plan.

What is explain plan and how is it used?

The Oracle explain plan is a statement that returns execution plans for the requested SELECT, UPDATE, INSERT and DELETE statements. The execution plan for any given statement shows the operations in sequence used by Oracle to run that statement.

How do you interpret a toad explain plan?

How to Explain Plan in Toad?

  1. In Toad, Open SQL editor by clicking on the menu Database > SQL Editor.
  2. Then type your SQL query and press Ctrl+E to execute Explain Plan for that query.
  3. If Plan Table does not exist in your database, then Toad will ask you to create a Plan Table.

What is an explain plan in SQL?

The EXPLAIN PLAN statement displays execution plans chosen by the optimizer for SELECT , UPDATE , INSERT , and DELETE statements. A statement execution plan is the sequence of operations that the database performs to run the statement.

How do you grant a Explain plan to a user?

Which is the EXPLAIN PLAN statement in Oracle?

19.1 Understanding EXPLAIN PLAN The EXPLAIN PLAN statement displays execution plans chosen by the Oracle optimizer for SELECT, UPDATE, INSERT, and DELETE statements. A statement’s execution plan is the sequence of operations Oracle performs to run the statement. The row source tree is the core of the execution plan.

Why does Oracle use explainplanoutput in SQL?

EXPLAINPLANoutput shows how Oracle runs the SQL statement when the statement was explained. This can differ from the plan during actual execution for a SQL statement, because of differences in the execution environment and explain plan environment. Execution plans can differ due to the following:

Which is the core of oracle’s execution plan?

A statement’s execution plan is the sequence of operations Oracle performs to run the statement. The row source tree is the core of the execution plan. It shows the following information: In addition to the row source tree, the plan table contains information about the following:

How to explain the execution plan in SQL?

To explain a SQL statement, use the EXPLAIN PLAN FOR clause immediately before the statement. For example: This explains the plan into the PLAN_TABLE table. You can then select the execution plan from PLAN_TABLE. See “Displaying PLAN_TABLE Output”.