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From Apache Wiki <>
Subject [Solr Wiki] Trivial Update of "FunctionQuery" by GrantIngersoll
Date Tue, 21 Jul 2009 13:27:30 GMT
Dear Wiki user,

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The following page has been changed by GrantIngersoll:

   1. Use a parameter that has an explicit type of FunctionQuery, such as DisMaxRequestHandler's
'''bf''' (boost function) parameter.
      * NOTE: the '''bf''' parameter actually takes a list of function queries separated by
whitespace and each with an optional boost.  Make sure to eliminate any internal whitespace
in single function queries when using '''bf'''.
      * Example: {{{q=foo&bf="ord(popularity)^0.5 recip(rord(price),1,1000,1000)^0.3"}}}
+ See
for information on how to hook in your own FunctionQuery.
  = Function Query Syntax =
  There is currently no infix parser - functions must be expressed as function calls (e.g.
sum(a,b) instead of a+b)

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