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difference between PESSIMISTIC_WRITE and read? [message #895258]

Thu, 12 July 2012 09:36

elhanan Maayan

Messages: 131
Registered: November 2009

Senior Member

hi..

i'm trying to figure out what's the difference between pessimistic_write and real, implementation wise, as i see no evidence of it anywhere being implemented by code. (nor in hibernate as well).

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Re: difference between PESSIMISTIC_WRITE and read? [message #899636 is a reply to message #895258]

Wed, 01 August 2012 15:59

James Sutherland

Messages: 1939
Registered: July 2009
Location: Ottawa, Canada

Senior Member

These are both implemented the same using a SELECT FOR UPDATE.

I think the spec was just allowing for some databases to treat these differently (but most don't).

James : Wiki : Book : Blog : Twitter

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