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That was interesting news to me. Using the CPYF technique, as outlined in
http://www-03.ibm.com/servers/eserver/iseries/db2/pdf/Performance_DDS_SQL.pdf
normally has no problem putting bad data into a DDS defined file from a
"flat" file. However, as you pointed out, a date field in a DDS defined
file still stops the bad data. Apparently there is some checking upon
writes. I wonder if that is because IBM started out fresh with date
fields and could do them right. However, if they started enforcing no bad
data into numerics (on a DDS defined file) thousands of applications out
there would start failing.

Rob Berendt

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