Thanks, Erik. that does work. I misunderstood the documentation, i
thought "clause" meant "field" rather than the terms in the query.
If dismax doesn't support the operator AND, why would the query
"solr/select?q=fuel+cell" and "solr/select?q=fuel+AND+cell" get parsed
differently(it adds the + for the AND query) and have different result
count?
@tommychheng
Programmer and UC Irvine Graduate Student
Find a great grad school based on research interests: http://gradschoolnow.com
On 6/17/10 5:17 PM, Erik Hatcher wrote:
dismax does not support the operator AND. It uses +/- only.
set mm=100% (not 1), as Hoss said, and try your query again.
Erik
On Jun 17, 2010, at 8:08 PM, Tommy Chheng wrote:
I don't think setting the mm helps.
I have mm to 1 which means the query terms should be in at least one
field. Both query strings satisfy this condition.
The query "solr/select?q=fuel+cell" is parsed as
"querystring":"fuel cell",
"parsedquery":"+((DisjunctionMaxQuery((text:fuel |
organization_name_ws_lc:fuel^5.0)) DisjunctionMaxQuery((text:cell |
organization_name_ws_lc:cell^5.0)))~1) ()",
"parsedquery_toString":"+(((text:fuel |
organization_name_ws_lc:fuel^5.0) (text:cell |
organization_name_ws_lc:cell^5.0))~1) ()",
returns ~900 results
The query "solr/select?q=fuel+AND+cell" is parsed as
"querystring":"fuel AND cell",
"parsedquery":"+(+DisjunctionMaxQuery((text:fuel |
organization_name_ws_lc:fuel^5.0)) +DisjunctionMaxQuery((text:cell |
organization_name_ws_lc:cell^5.0))) ()",
"parsedquery_toString":"+(+(text:fuel |
organization_name_ws_lc:fuel^5.0) +(text:cell |
organization_name_ws_lc:cell^5.0)) ()",
returns ~80 results
(this is the behavior i want for query "fuel cell" because it adds
the extra +). I want to do this without adding the AND for every query.
@tommychheng
Programmer and UC Irvine Graduate Student
Find a great grad school based on research interests:
http://gradschoolnow.com
On 6/17/10 4:19 PM, Chris Hostetter wrote:
: I'm using the dismax request handler and want to set the default
operator to
: AND.
: Using the standard handler, i could just use the q.op or
defaultOperator in
: the schema, but this doesn't work using the dismax request handler.
:
: For example, if I call "solr/select/?q=fuel+cell", I want solr to
handle it as
: a "solr/select/?q=fuel+AND+cell"
Please consult the dismax docs...
http://wiki.apache.org/solr/DisMaxRequestHandler#mm_.28Minimum_.27Should.27_Match.29
dismax uses the "mm" param to decide how clauses that don't have an
explicit operator will be dealt with -- the default is to require
100% of
the terms, so if you aren't seeing that behavior then you have a
solrconfig.xml that that sets the default mm value to something else.
Starting with Solr 4.0 (and mybe 3.1 if it's backported) the default mm
will be based on the value of q.op (see SOLR-1889 for more details)
-Hoss
