We've got a data model where columns have a logical association, and this is 
encoded into the column qualifiers by having each group be a contiguous range 
of qualifiers. For instance, columns with first byte 0x00, 0x01, 0x02 or 0x03 
form group A and columns with first byte 0x04 or 0x05 form group B.

We'd like to efficiently delete just group A from a row, while leaving 
everything in group B, which currently seems to require two steps: read the row 
to find the column qualifiers that exist in group A (we can use a 
ColumnRangeFilter to at least ignore everything in group B), and then doing a 
delete after .addColumns-ing those qualifiers.

Is there a better way to do this? For instance, a similar way to apply filters 
to a delete?

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Huon Wilson
CSIRO | Data61
https://www.data61.csiro.au

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