in reply to Sort undef

Well deaccent() must handle undef differently. Like returning a string guarantied to be always maximal . Like 'X'x100

100 is a guess, you don't show us your data.

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Re^2: Sort undef
by Anonymous Monk on Jun 11, 2017 at 22:47 UTC

    Thanks

Re^2: Sort undef
by Anonymous Monk on Jun 11, 2017 at 22:43 UTC

    This was quite easy...

Re^2: Sort undef
by Anonymous Monk on Jun 12, 2017 at 15:08 UTC
    'Z' comes after 'X'x100, no matter how big you make 100.