(PECL solr >= 0.9.2)
Maps to facet.missing
public SolrQuery SolrQuery::setFacetMissing ( bool $flag [, string $field_override ] )
Used to indicate that in addition to the Term-based constraints of a facet field, a count of all matching results which have no value for the field should be computed
Parameters:
flag
TRUE
turns this feature on. FALSE
disables it.
field_override
The name of the field.
Returns:
Returns the current SolrQuery object, if the return value is used.
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