Changing ft_min_word_len without rebuilding old indexes - will that work as described below?

[Arkadiusz Miskiewicz]

Hello.

I have tons of myisam indexes with ft_min_word_len=4. Now I want to change it to other value, like 3 but without rebuilding old indexes. For old indexes =4 is simply ok.

Will such change be ok from mysql point of view and everything will work just fine? I mean old indexes would behave like ft_min_word_len=4 while new (or rebuilt) indexes will behave as ft_min_word_len=2?

Documentation doesn't really cover that. It only mentions that " `FULLTEXT` indexes on `MyISAM` tables must be rebuilt after changing this variable" which would be make sense if anyone would want to new setting to work for existing indexes but that isn't my case.