Data truncated for column 'xy' at row 'nbr'

[ThomasKHill]

When altering a column definition of an InnoDB table I got warnings:
!error 1005 data truncated for column 'xy' at row 5
!error 1005 data truncated for column 'xy' at row 15
... and so on
when the query was executed using query browser 1.1.10.

If I would like to see the rows in which the values got truncated - how do I retrieve them? In other words how are the rows numbered? How do I find out which row is row number 5 amd which row number 15 ....? What is a row number?

(It can not be the rows with a value 5 in the primary key field)

query browser 1.1.10 on win xp MySQL 5.0.7

Thanks