mysql - INSERT ON DUPLICATE KEY UPDATE with WHERE clause -


i'm creating record in mysql , if it's there don't want create it. update field called invite_state, mean whatever relation was, should go state invited. problem there 1 exception rule - if state unsubscribed shouldn't go invited.

so on duplicate key update in mysql doesn't support where clause. there workaround?

a workaround use if statement.

insert (...) values (...) on duplicate key update set invite_state = if(where_condition, new_value, invite_state)

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