The prepared query example on page 41 seems to be wrong to me.

A couple of issues:
1) If I do the prepare before the call to setVariableValue, I get an
error - err:XPST0001. Swap the lines around and all is fine.
2) In the calles to setVariableValue using "Oranges" and "Kiwi", surely
myVar should be quoted as in the setVariableValue line using "Tarragon"?

Many thanks