I have a question which closely relates to this question.
In my schema I have a field
<field name="text" type="textgen" indexed="true" stored="true" required="true"/>
This gives an exact match, ie. stemming disabled
eat = eat
Is it possible, while configured to textgen to search for other variants of the word
eg. eat = eat, eats, eating
eat~0 will give similar sounding words such as meat, beat etc. but this is not what I want.
I'm starting to think that the only way to achieve this is to add another field with something other then textgen but if there is a simpler way I am very interested to hear it.
Using copyfield statements is the normal approach in Solr. Since stemming is the answer to exactly what you're asking, this is what I recommend you to use. You can set stored=false if you are worried about index size.
You might also use lemmatisation, which is the opposite of stemming - where you instead add a words all inflected forms. This is typically performed on the search query, expanding e.g., eat to eat, eats, eating etc.
The third alternative might be to use wildcard search, although I wouldn't encourage it. Not least since it bypasses all schema configured filters for the target field.
If you use text as the field type, then eat, eats, eaten and eating will all be stored as eat and a search for FieldName:eat will find all of them. If you change the field type to text-gen then the search for FieldName:eat will only find "eat", not eats, eaten or eating.
来源：https://stackoverflow.com/questions/6428597/exact-word-search-in-solr