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From "Nils Kaiser (Updated) (JIRA)" <>
Subject [jira] [Updated] (SOLR-3385) Extended Dismax parser ignores all regular search terms when one search term is using + (dismax behaves differently)
Date Fri, 20 Apr 2012 16:22:40 GMT


Nils Kaiser updated SOLR-3385:

    Attachment: select_PLUSsales_edismax_9600results.xml

Added explain queries for the cases explained in the description. Tried both dismax and edismax
parser. the file name format is: select_[used search terms (PLUS means +)]_[dismax / edismax]_[number
of results]results.xml

As you can see, dismax behaves differently (it always assumes a search term without a + behaves
as if it had + specified).

"+sales" -> 9600 results
"dev +sales" -> 553 results
"dev +sales miau" -> 0 results (miau is not in index).
On the other hand, edismax parser ignores the terms that do not start with + if another term
has + specified.

"+sales" -> 9600 results
"dev +sales" -> 9600 results
"dev +sales miau" -> 9600 results
"dev sales miau" -> 0 results (the bug only occurs if at least one search term uses + or
> Extended Dismax parser ignores all regular search terms when one search term is using
+ (dismax behaves differently)
> --------------------------------------------------------------------------------------------------------------------
>                 Key: SOLR-3385
>                 URL:
>             Project: Solr
>          Issue Type: Bug
>          Components: query parsers
>    Affects Versions: 3.5
>            Reporter: Nils Kaiser
>         Attachments: select_PLUSsales_dismax_9600results.xml, select_PLUSsales_edismax_9600results.xml,
select_dev_PLUSsales_dismax_553results.xml, select_dev_PLUSsales_edismax_9600results.xml,
select_dev_PLUSsales_miau_dismax_0results.xml, select_dev_PLUSsales_miau_edismax_9600results.xml,
> When using the extended dismax parser with at least one term using + or -, all other
search terms are ignored.
> Example:
> (the terms dev and sales are found in the index, the term miau is not part of the index)
> "dev sales miau", "+dev +sales +miau", "dev +sales +miau" all give me 0 results (as expected)
> "dev +sales miau", "dev +sales" or "+sales" return the same number of results (dev and
miau terms are ignored)
> The standard dismax parser always treats search terms as +, so "dev sales miau", "+dev
+sales miau", "dev +sales miau" return the same number of results. 

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