>Not a good feature for me.
Me neither, but...
>Check existence and then insert or update.
At least once a week I seem to be responding to this exact same suggestion. Somebody
_please_ tell me if I'm the only one in the whole world who worries about race
conditions? What's wrong with just making sure there's a proper unique key, and then
just inserting the row? The returned error message will tell you if a failure is due
to duplicate key, missing non-null column, or an actual disaster.
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