Re: DELETE vs TRUNCATE explanation

On 07/11/2012 03:18 PM, Craig James wrote:

> It strikes me as a contrived case rather than a use case.  What sort of
> app repeatedly fills and truncates a small table thousands of times ...
> other than a test app to see whether you can do it or not?

Test systems. Any company with even a medium-size QA environment will
have continuous integration systems that run unit tests on a trash
database hundreds or thousands of times through the day. Aside from
dropping/creating the database via template, which would be *really*
slow, truncate is the easiest/fastest way to reset between tests.

If TRUNCATE suddenly started defaulting to DELETE on small table-sets
and several iterations led to exponential index growth, that would be
rather unfortunate.

--
Shaun Thomas
OptionsHouse | 141 W. Jackson Blvd. | Suite 500 | Chicago IL, 60604
312-444-8534
sthomas@optionshouse.com



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