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Unique Blob Index for lower transaction isolation levels


Hi Sergei,

Actually I was thinking a different way of implementing this.

in function  ha_write_row , after it calls storage engine write, we
can check for inserted values and see if it is inserted more than

Of course, it can be I/O intensive (or it may not be , because  data
should be in buffer ). We have to do this only when there is multiple
clients doing inserts in same table. But I am not sure if there is any
way to find this. What do you think ?