/**
* Construct the full SQL query to do the search.
* @param $term String
* @param $fulltext String
* @param $colname
*/
function searchQuery($term, $fulltext, $colname)
{
# Get the SQL fragment for the given term
$searchstring = $this->parseQuery($term);
## We need a separate query here so gin does not complain about empty searches
$SQL = "SELECT to_tsquery({$searchstring})";
$res = $this->db->query($SQL);
if (!$res) {
## TODO: Better output (example to catch: one 'two)
die("Sorry, that was not a valid search string. Please go back and try again");
}
$top = $res->fetchRow();
$top = $top[0];
if ($top === "") {
## e.g. if only stopwords are used XXX return something better
$query = "SELECT page_id, page_namespace, page_title, 0 AS score " . "FROM page p, revision r, pagecontent c WHERE p.page_latest = r.rev_id " . "AND r.rev_text_id = c.old_id AND 1=0";
} else {
$m = array();
if (preg_match_all("/'([^']+)'/", $top, $m, PREG_SET_ORDER)) {
foreach ($m as $terms) {
$this->searchTerms[$terms[1]] = $terms[1];
}
}
$query = "SELECT page_id, page_namespace, page_title, " . "ts_rank({$fulltext}, to_tsquery({$searchstring}), 5) AS score " . "FROM page p, revision r, pagecontent c WHERE p.page_latest = r.rev_id " . "AND r.rev_text_id = c.old_id AND {$fulltext} @@ to_tsquery({$searchstring})";
}
## Redirects
if (!$this->showRedirects) {
$query .= ' AND page_is_redirect = 0';
}
## Namespaces - defaults to 0
if (!is_null($this->namespaces)) {
// null -> search all
if (count($this->namespaces) < 1) {
$query .= ' AND page_namespace = 0';
} else {
$namespaces = $this->db->makeList($this->namespaces);
$query .= " AND page_namespace IN ({$namespaces})";
}
}
$query .= " ORDER BY score DESC, page_id DESC";
$query .= $this->db->limitResult('', $this->limit, $this->offset);
wfDebug("searchQuery returned: {$query} \n");
return $query;
}
