kolumnaarset
Kolumnaarset is a term found in some Scandinavian technical writings to describe a set of values associated with a single column in columnar data systems. In this sense, a kolumnaarset represents the distinct elements that occur in a given column, potentially together with frequency information or an encoding optimized for columnar storage.
Common implementations use dictionary encoding (mapping distinct values to compact codes), bitmaps indicating presence of a
In query processing on columnar databases, kolumnaarsets enable rapid pruning and acceleration of operations that depend
Note that there is no universally standardized definition, and the term may be used informally or as