Github user gerhardgossen commented on the pull request:
https://github.com/apache/gora/pull/23#issuecomment-93663873
@renato2099: you need to distinguish between the *field name* (e.g.
'content') that is used in the external API (for example as members of the
value objects) and the *column name* (e.g. 'f:cnt') that is used in the data
store (in this case Accumulo). The mapping between both is specified in the
`gora-*-mapping.xml` files.
`deleteByQuery` is part of the external API and therefore receives field
name values (as part of the query parameter). If we change this method it would
break user code that tries to delete a map/array field. As a map is represented
in Accumulo as a collection of fields, we would also need to delete `cf:*`
instead of a single `cf:qualifier`.
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