Erick Erickson wrote:
Let me chime in here on a different note.... before you get happy with
wildcard queries, take a look at the thread "I just don't get
wildcards at
all". There is lots of good info that Erik, Chris and Otis provided me.
The danger with prefixquery and wildcard query is that they will throw
TooManyClauses exceptions when you start matching a number of terms (the
default is 1024, although you can make this much bigger if memory
allows).
If you're aware of this and it is and will be OK in your app, ignore
this.
But if your index is going to grow significantly, this is a real
problem. I
went with implementing filters with WildCardTermEnum (you could also use
RegexTermEnum) for the wildcard portions of my query. Which has
interesting
implications for spans, we elected to say spans didn't work with
wildcards.
Anyway, as I said, if you're aware of the TooManyClauses issue and are
sure
it doesn't matter, ignore me. After all, everybody else does <G>.....
Best
Erick
On 8/30/06, Mark Miller <[EMAIL PROTECTED]> wrote:
Ignore that last question. I see that you said prefix wildcard query and
not wildcard query. A quick look at the code seems to show it grabbing a
prefix as well.
Do you think one would be any faster than the other? Should I used
Wildcardqueries outside of spanqueries and the regexquery inside
spanqueries or use regex both places?
- Mark
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Thanks a lot for the info Eric. Good stuff to know for sure.
I guess the real question I have been trying to spit out is this:
Is a span version of any of these searches--fuzzy, wildcard,
etc--inherently slower than their non-span brothers. If they have the
same limitations and speeds then that is all I am looking for.
P.S.
I realize I have been screwing up the threading by replying when
starting a new topic. I have been alerted and will stop this pernicious
activity.
- Mark
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