-- Copyright 2018 Tanel Poder. All rights reserved. More info at http://tanelpoder.com

-- Licensed under the Apache License, Version 2.0. See LICENSE.txt for terms & conditions.

--------------------------------------------------------------------------------

--

-- File name: demo2a.sql

--

-- Purpose: Advanced Oracle Troubleshooting Seminar demo script

-- Will cause some recursive dynamic sampling activity

-- that does not show up in V$SESSION and ASH

--

-- Uses SwingBench Order Entry schema table (but you can use

-- any other large table for testing this effect).

--

-- Requires Oracle 11.2 or lower (12c works slightly differently)

--

-- Author: Tanel Poder ( http://tanelpoder.com )

-- Copyright: (c) Tanel Poder

--

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prompt Starting Demo2a...

set echo on

ALTER SYSTEM FLUSH SHARED_POOL;

SELECT /*+ DYNAMIC_SAMPLING(o 10) */ * FROM soe.order_items o WHERE order_id = 1;

SELECT /*+ DYNAMIC_SAMPLING(o 10) */ * FROM soe.order_items o WHERE order_id = 1;

SELECT /*+ DYNAMIC_SAMPLING(o 10) */ * FROM soe.order_items o WHERE order_id = 1;

ALTER SYSTEM FLUSH SHARED_POOL;

SELECT /*+ DYNAMIC_SAMPLING(o 10) */ * FROM soe.order_items o WHERE order_id = 1;

SELECT /*+ DYNAMIC_SAMPLING(o 10) */ * FROM soe.order_items o WHERE order_id = 1;

SELECT /*+ DYNAMIC_SAMPLING(o 10) */ * FROM soe.order_items o WHERE order_id = 1;

set echo off