(PECL solr >= 0.9.2)
SolrDocument::merge — Merges source to the current SolrDocument
$sourceDoc
$overwrite
Merges source to the current SolrDocument.
sourceDoc
The source document.
overwrite
If this is TRUE then fields with the same name in the destination document will be overwritten.
TRUE
성공 시 TRUE를, 실패 시 FALSE를 반환합니다.
FALSE