Fastload utility does not support duplicate rows.
1.Since MS table supports duplicate rows Fast load cannot load MS
table.
2.Restart logic is one of the reason. Fast load is one of the
utility which loads data in blocks (64K). During restart Fast load sends some
of the rows for the second time which occur after a checkpoint. Due to this
Fast load rejects duplicates.
For example consider 20 rows to be loaded in a table. FL utility
is used to load the table and checkpoint is 5 rows. If restart occurs after 7th
row FL may send 6 and 7th to AMPs during the restart. These records would be
considered as duplicates and rejected
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