func (w *writer) DeleteColumns(cf string, key []byte, columns [][]byte) Writer {
tm := w.addWriter(cf, key)
d := cassandra.NewDeletion()
ts := now()
d.Timestamp = &ts
sp := cassandra.NewSlicePredicate()
colNamesArr := make([][]byte, len(columns))
for i, name := range columns {
colNamesArr[i] = name
}
sp.ColumnNames = &colNamesArr
d.Predicate = sp
tm.Deletion = d
return w
}
func (r *reader) buildPredicate() *cassandra.SlicePredicate {
sp := cassandra.NewSlicePredicate()
if r.setColumns {
colArr := make([][]byte, 0)
for _, col := range r.columns {
colArr = append(colArr, col)
}
sp.ColumnNames = &colArr
} else if r.setSlice {
sp.SliceRange = sliceToCassandra(&r.slice)
} else {
sp.SliceRange = fullSlice()
}
return sp
}