Comparing execution plans is one of the most useful diagnostic tests you can do. If you’re lucky enough to have a good execution plan, you can use that plan to correct the bad execution plan. In Chapter 8 we talked about using SQL Profiles to apply a plan onto another database’s SQL, in order to have an emergency option. Suppose, however, you have more time to consider the difference and try to fix it properly, rather than using the SQL Profile sticking plaster. SQLTCOMPARE is the tool for the job. It will compare two target systems for the ...
© Stelios Charalambides 2017
Stelios Charalambides, Oracle SQL Tuning with Oracle SQLTXPLAIN, 10.1007/978-1-4842-2436-6_19
19. Comparing Execution Plans
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