Issue with stemming and lemmatizing

[sara hajili]

I wanna to write my own text tokenizer.
And my question is about what solr treat with stemming  or lemmatizing?
Solr store both lemmatizerd token and orginal token together?
I mean if in index time solr lemmatize creation to create.
And in query time.user want to search about exactly creation not creat.
How solr do that?!
If I lemmatize query string creation  to create
In this way solr find all create not creatin.
How solr behave with stemmer and lemmatizer?index both original and
lemmatized word?