Details
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Improvement
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Status: Open
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Major
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Resolution: Unresolved
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None
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Description
It would be useful to have the ability to have an InputFormat that stitches together multiple files where the files have a 1:1 relationship for rows. If the column name has appeared previously, its value will be used instead of the original value. If the column name is new, it will be appended on to the row.
This will allow simple cases of appending or updating fields without re-writing the file until later.