Howto use fields "by name"

[afvaiv <afvaiv@xxxxxxxxxx>]

Folks,
I don't know if the following can be done or not.
I'm reading a file, whose records contain SQL sentences like
"INSERT INTO xxxxx (fielda, fieldh, fieldx) VALUES ('aaaaa',18,'xyz');

I want to be able to
- parse that sentence,
- read the field names in a loop, into a variable that will contain one 
field name at a time
- read the new values in same loop, into a variable that will contain 
one value at a time

now comes the question:

I would have to do a lot of  "case" sentences, or nested "if's" so that 
in the end I could either MOVE or EVAL each field to its new value. The 
question is: since I will have the field name as the value contained in 
a variable called "FieldName",
can I do some kind of   Eval   of the real field to the desired value, 
addressing the field by the name contained in FieldName?

I hope I made it clear enough.

Any examples or hints?
TIA

--
Antonio Fernandez-Vicenti
afvaiv@xxxxxxxxxx