How can I test that index has helped me
Hi all,
It is called that to increase performance, an index could be created at table.
However how can I see the performance.
Thanks.
Hi,
Basically INDEX works like Pointer in C language. It will point to the addresses of the records which satisfy the field values in the INDEX. So searching for direct address is much easier than searching whole data base.
U can take an example of searching for a person in the company data base. If u give the person name then there may be somany persons with the same name so u have to filter the output as per ur requirement to find the exact person. Rather if u give Employee number then it will directly return single record. INDEX will also works in the exact way.
How to test
Create one sample program to test(Select statements with out using INDEX). First Go to ST05 and on SQL trace, Execute your program, Trace off in ST05 and Analyze ST05.(Data base time, application server time etc).
Now change ur select statements by using INDEX. Do the same thing above. Then u will come to know how effective the INDEX is.
There is another command to know the execution time of the select.
Use GET RUN TIME command before and after execution of some select query with and with out using INDEX. The difference time will be the execution time of that select. In this way also u can analize.
Thanks,
Vinod.
Edited by: Vinod Kumar Vemuru on Mar 4, 2008 8:17 PM
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