Resource for index

[Eca]

Friends :

I have a part of statment as below :

select column1 from table1
where column1 = v_parameter;

The column1 is not indexed, so the table full scan will be executed.
Right?
Well, I would like to know if anyone knows the resource :

select column1 from table1
where column1 = v_parameter +0

What does it mean (+0).
What kind of resource is it ?
What does it do ?

Best Regards

Eriovaldo

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