>Creating an extra field filled with SYS(2017) and then comparing that field seems to work. I am double checking. Will let you know results.
>
>Thanks Naomi and Hilmar,
>
>Alex
It works this way. If you don't find the checksum of a record you want to add, in the history table, then you know for sure that you can add the record.
If you do find the checksum in the history table, you have to do additional verifications, to see whether all the values are, indeed, the same. It is possible that different sets of values give the same hash. With a 32-bit checksum, the probability for this happening for a single record is very small (1 / 2^32), but if you add 1000 records, and already have 100,000 records in the history table... well, you can multiply the probability of getting a conflict on SOME set of records (even if they are all different) by 1000 x 100,000 in this example.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)
