Is it possible to use a dynamic writer to update? I want to read multiple feature classes, join each feature class and then update the joined records in a different database. Matching columns are not available when selecting Update feature operation.
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Yes this is possible. You're right, the attributes wouldn't be available on the writer parameters because the dynamic writer doesn't know what they're going to be until runtime.
So I think you have two choices:
- Manually expose the attributes using the AttributeExposer transformer
- Instead of picking the attributes, make a where clause in an attribute (like myWhereClause: myAttribute = myFieldName) and use that as a WHERE clause instead of a Match Column
Hope this helps.