From: Zardosht Kasheff
Date: February 12 2010 10:08pm
Subject: question on HA_EXTRA_IGNORE_DUP_KEY
List-Archive: http://lists.mysql.com/internals/37708
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Hello all,

I am trying to implement an optimization in our storage engine if
HA_EXTRA_IGNORE_DUP_KEY is set. Would it be ok if handler::write_row
returns success if this flag is set, the sql statement is NOT
SQLCOM_REPLACE or SQLCOM_REPLACE_SELECT, and the row is not inserted
if a duplicate is otherwise there.

Basically, the question is if this flag is set, is it ok to not return
HA_ERR_FOUND_DUPP_KEY in the cases where the statement is not "replace
into".

Thanks
-Zardosht