Thanks - I understand that, but if it simply returned the String from the 
function (that it already computed) it’d be fine. But instead it’s then trying 
to convert that String from hex for some reason that’s the part that’s failing?

> On 23 Oct 2019, at 1:32 pm, Evgenij Ryazanov <kat...@gmail.com> wrote:
> 
> 
> Hello.
> 
> java.lang.Number is an abstract class in Java that has different 
> implementations, such as `BigInteger`, `BigDecimal`, wrappers over primitive 
> data types and you can create your own implementations too. So, technically, 
> it can hold everything.
> 
> This data type is not supported by JDBC. It cannot be supported as a number, 
> because it can hold different not really compatible with each other objects. 
> Its mapping to a JAVA_OBJECT looks like being perfectly valid.
> 
> Note that NUMBER data type from SQL is mapped to a BigDecimal in JDBC 
> specification and in H2.
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