While this is true in the general case, in the concrete case, you usually have all queries generated by a fixed program, and most likely these queries differ only in their interpolated values (unless the application programmer had been smart and used placeholders, but then the whole point would be moot). In such a case, it can still make sense to check the queries for similarity by reversing the interpolation process and parsing the statement back into a placeholder query.

In reply to Re^2: Trimming hash based on element uniqueness by Corion
in thread Trimming hash based on element uniqueness by mhearse

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