DECIMAL(X,Y) not working correctly in SQLite

[hostilefork]

In MySQL the DECIMAL test seems to work:

Inserting as DECIMAL(3,2)
[-3.4 -1.2 0.0 5.6 7.8]
=> [-3.4 -1.2 0.0 5.6 7.8]
QUERY MATCHED ORIGINAL DATA

But it gives back strange output in SQLite...seemingly strings:

Inserting as DECIMAL(3,2)
[-3.4 -1.2 0.0 5.6 7.8]
=> ["-3.^@" "-1.^@" "0" "5.6" "7.8"]
QUERY DID NOT MATCH ORIGINAL DATA

[hostilefork]

This is a by-product of a general problem with SQLite's handling of SQLDescribeCol, where SQL_VARCHAR is coming back as the column type so they were making strings:

https://stackoverflow.com/q/58438456/211160

So now there's a workaround committed. But what it does is ask for the values in Rebol's floating point repesentation (a C double).

Inserting as DECIMAL(3,2)
[-3.4 -1.2 0.0 5.6 7.8]
=> [-3.4 -1.2 0.0 5.6 7.8]  ; a Rebol DECIMAL! (e.g. floating point)
QUERY MATCHED ORIGINAL DATA

This kind of undermines the use of a DECIMAL representation, so strings might be better in a sense...but not like this, as these strings appear to be buggy. Probably the minus sign is counting as one of the decimal digits.