Should not your application just retrieve the UTF-8 text and format it for display to the user? User <-> Software formatting (and input/output diddling of any type) should only be done ONCE (on INPUT from the user or on OUTPUT to the user) as close to the User as possible and should *NEVER EVER* be done as an intermediate step that is used for any other purpose (that originating from or terminating with a user).
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It is neither possible nor expected for a "Data Storage System" to know about the local foibles of the user -- that is an application programming (UI) issue. "Data Storage Systems" store data in a user-foible-free state. Date/Time are UTC ISO8601, text (encoded) is just a bunch of character units stored side-by-each, blobs are just a sequence of bytes stored side-by-each, integers are, well, integers in binary format; and, floating point is stored in floating point format (as an approximation to a value). Placement of comma's/decimal points, display precision of floating point numbers, formatting of dates and "bag-o-bytes" (encoded text or blobs) are UI issues and not properly a part of the "Data Storage System". That SQLite contains a "printf" function is quaint, but it is merely quaint and should not be expected to provide the same capabilities as a "proper" UI. --- The fact that there's a Highway to Hell but only a Stairway to Heaven says a lot about anticipated traffic volume. >-----Original Message----- >From: sqlite-users [mailto:sqlite-users- >boun...@mailinglists.sqlite.org] On Behalf Of Ralf Junker >Sent: Saturday, 17 February, 2018 10:40 >To: sqlite-users@mailinglists.sqlite.org >Subject: [sqlite] printf() problem padding multi-byte UTF-8 code >points > >Example SQL: > >select > length(printf ('%4s', 'abc')), > length(printf ('%4s', 'äöü')), > length(printf ('%-4s', 'abc')), > length(printf ('%-4s', 'äöü')) > >Output is 4, 3, 4, 3. Padding seems to take into account UTF-8 bytes >instead of UTF-8 code points. > >Should padding not work on code points and output 4 in all cases as >requested? > >Ralf >_______________________________________________ >sqlite-users mailing list >sqlite-users@mailinglists.sqlite.org >http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
