ghalliday/HPCC-Platform — comment on commit 3dff10978d860f9d25587f7f772394f6641e1f7b
File: ecl/hql/hqlmeta.cpp line 447
By ghalliday:

I don't quite understand the comment.

preservesValue() isn't reversible - e.g, integer4->integer8

If you meant preservesOrder then that isn't true either. integer4->string20 preserves value but not ordering.