On Sat, Oct 15, 2016 at 1:21 AM, Rajnish Kamboj <[email protected]> wrote:
> Hi
>
> Performance of Prefix, Wildcard and Regex queries?
> Does Lucene internally optimizes this (using rewrite or something else) or
> I have to manually create specific queries depending on input pattern.
>
> Example
> if input is 78* create Prefix query
> if input is 87?98* create Wildcard query
> if input is 87[7-5]* create Regex query.
I think QueryParser already takes care of converting to PrefixQuery
when possible.
Regexes aren't really possible, though. Consider this:
abc* (wildcard query, matching abc followed by anything)
Versus this:
abc* (regex query, matching ab followed by 0 or more c)
I think for that, you're going to want additional syntax in your query parser.
TX
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