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It is now possible to reference any section of the record (offset,length) even if it does not correspond to a field:
It can be very useful to be able to write a filter (or a conditional expression in general) that directly references a section of the record even if this section does not correspond to a field. For conditional expressions, we now allow retrieving a portion of a record as it would be a CT_ARRAY field.
The new function syntax is FIELD(offset,size) and evaluates as a CT_ARRAY field with length size containing the portion of the current record starting at offset offset.
