Thanks moritz. I got confused and was thinking the {} was turning it into a reference when in fact the {} is part of the %{}. So it would need to be %{{%$ParamValues, %$ParamTypes}} if it was to work as I thought. The 1/8 confused me - I couldn't see where the 8 came from.

In reply to Re^2: Problem with hash dereferencing from DBI example by mje
in thread Problem with hash dereferencing from DBI example by mje

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