The documentation on prefix queries states: "Matches documents that have fields containing terms with a specified prefix (not analyzed)".
I took this to mean that the mapping for the field had to be not_analized. However, after some experimentation, I found that it does sort of work on an analysed field, but the query is not analysed. Eg. I found I could use a custom analyser on the field that uses a keyword tokenizer and a lowercase token filter and, so long as I lower case the query string myself, I can use a prefix query to get a case insensitive prefix match.
So I am wondering if this is valid and, if so, am I alone in thinking the documentation is misleading? Perhaps it should state that the query is not analysed and to take care when matching on an analysed field?
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