mysql - SUBSTRING_INDEX() results "omit" character when used inside LOWER() -


i found strange bug in mysql i've reported here:

bug #60166

  • can confirm me bug, , not understanding problem of how work mysql? (valeriy kravchuk: thank bug report. verified described)
  • what reason of bug???
  • is there provide advice solve issue other described in bug report?
  • and if can me install mysql udf on windows mysql 5.5.8 despites bug #45549, i'll very gratefull!

anyway, in regard of bug #42404, substring_index() seems have strange behavior.

thanks advance help!

[edit]

here, possibles solutions given me in bug report:

suggested fix:

  • use:

    mysql> select substring_index(lower(@user_at_host), '@', -1);

    instead of:

    mysql> select lower(substring_index(@user_at_host, '@', -1));

  • avoid using of buggy function (see more 1 year old bug #42404), and:

select substring_index(lower(@user_at_host), '@', -1);

or

select lower(substring(@user_at_host, locate('@', @user_at_host)+1));

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