Problem With NULLS In Data Flow Vs Identity Column

Dec 12, 2007

I'll preface this by saying I'm pretty new to SSIS; I'm coming over from Coldfusion and don't have much DTS experience to draw from either. That said....

I've got a package that I run to migrate data from a bunch of older databases into a "flat" new schema. The new schema is not identical to the old, in other words, so it's not a simple mapping of existing columns. All the data flow tasks have finally gotten to a working state, with much trial-and-error. Now, suddenly one of the tasks is throwing this error:
"...Cannot insert the value NULL into column 'the_id', table 'the_table'; column does not allow nulls. INSERT fails."

The column is an identity column in the new table; it is NOT NULL as it is the primary key. I've triple-checked that identity is on. Basically it's generated anew each time this package is run. In the data flow task, mappings are set to ignore for this column; also, Keep identity and Keep nulls are on (although since this column is not in the source I can't see how this affects anything.)

(***For anyone wondering why in the heck I'd need this column at all, offhand I can't recall if later tasks use it or not...I'm actually wondering if it's even needed in this read-only table if it's not used as a foreign key somewhere else...however, I'd like to figure out this issue regardless... )

I've had a hard time finding anyone with the same problem out there...usually people with NULL issues simply are trying to insert into a NOT NULL column. The big difference here is that the column is identity.

Thanks,
Rick

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-------     -----                ----          ----
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-------     -----                 ----         -------

aa     #a-1,India                              10
bb     #a-1,India                              11                
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-------     -----                ----
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Table 1:

-------     -----                ----          ----
Name       Add                  No         RowID
-------     -----                 ----         -------
aa     #a-1,India                1              10
bb     #a-1,India                2              11                
aa     #a-1,India              1 12

----------------------------------------------------

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