How do I do a boolean OR in solr?

Question

I am completely new at this...

I am using durpal with the apachesolr module.

I have the following filter:

(  tid:19895 OR tid:19937 ) AND  type:poster"

This does not return any results, but if I have the following, it returns the results as expected

(  tid:19937 ) AND  type:poster"

EDIT: This is all in a filter. I need to have a list of tids that it could be along with having type be poster. So it has to be type:poster AND one of the following tids: 19895, 19937

Answer 1

although:

((tid:(19895 OR 19937)) AND type:poster) should work irrespective of defaultOperator being OR/AND

adding the clauses as separate filter is better, so add two filters as

tid:(19895 OR 19937)

type:poster

should filter out the results working as AND and also cache the results for this filter separately for improved query performance for new queries using this filter.