> > Hi Jean, there's still a problem with querying Texts. 'find image
> > pick_me_to_call = display' returns no hits. Either '*display' or
> > 'display*' or '"display"' works, but not without * or enclosing quotes.
>> the problem comes from the fact that Display is a tag in your system
Yikes! The oldest gotcha in the book.
But wait... I thought this was only a problem when querying directly for
objects by name. E.g. 'find colleague fax' finds colleagues with a value
for tag Fax and not colleagues whose name is Fax.
> your case is a bit different you say
>> Pick_me = Display
That's right, the "=" means I'm looking for the value of tag Pick_me to
match the argument, interpreted as a literal string.
But wait...
> suppose you want to find fat people you say
>> Size = Weight
>> here you hope that weight is a tag with a numerical value
> to force nunmerical evaluationyou can put []
What??!! The argument of "=" can be a tag whose _value_ is substituted?
I never knew that. I can't find it in any of the xace Help or AGIS ACEDB
documentation either. But it seems to be true. For these records,
Trait_scores : "A"
Score 9
Standard_deviation 9
Trait_scores : "B"
Score 9
Standard_deviation 30
the query 'find trait_scores score = [standard_deviation]' finds A and not
B. The [] are required on the right-hand-side.
This doesn't work for string comparisons though.
So, if there is an "=" and the argument has no [], would it be reasonable
to always treat the argument as a literal string?
- Dave
