I allow my users to click on column titles to sort the tables by any field,
and I dynamically rewrite the query with a different ORDER BY <Clicked Field
Name>.. When there are joins It is not so easy to work out what the
prefix should be, so I rather rely on the ambiguity being allowed. This
functionality is written into ancestor forms, which can be inherited and
populated with any table, and I do not want to have to hard-code every
field-name and its prefix. Throwing an error will give me some problems,
unless someone can tell me how (using Delphi, IBO and VCL) I can get the
correct alias-prefix for the field which has been clicked.


Roger Vellacott
Passfield Data Systems Ltd