PHP - Manual: SolrCollapseFunction::setNullPolicy
2024-12-22
(PECL solr >= 2.2.0)
SolrCollapseFunction::setNullPolicy — Sets the NULL Policy
Sets the NULL Policy. One of the 3 policies defined as class constants shall be passed. Accepts ignore, expand, or collapse policies.
nullPolicy
官方地址:https://www.php.net/manual/en/solrcollapsefunction.setnullpolicy.php