Drupal: soluzione problema modulo ricerca – “CREATE TEMPORARY TABLE”

Sistema trovato in internet che permette di aggirare il problema della creazione di tabelle temporanee.
Testato con successo su Drupal 5.1.
Per verificare: http://forum30013.altervista.org/?q=search/node

Due semplici passaggi:


1) Su phpMyAdmin eseguire la query

Citazione:

---

CREATE TABLE `temp_search_results` (
`type` varchar(16) default NULL,
`sid` int(10) unsigned NOT NULL default '0',
`score` double default NULL
) TYPE=MyISAM;
CREATE TABLE `temp_search_sids` (
`type` varchar(16) default NULL,
`sid` int(10) unsigned NOT NULL default '0',
`relevance` double default NULL,
`matches` bigint(21) NOT NULL default '0'
) TYPE=MyISAM;

---

2) In drupal\modules\search, nel file search.module sostituire, dopo avere fatto un backup del file, alla funzione do_search il seguente codice:

Codice PHP:

---

function do_search($keywords, $type, $join1 = '', $where1 = '1', $arguments1 = array(), $select2 = 'i.relevance AS score', $join2 = '', $arguments2 = array(), $sort_parameters = 'ORDER BY score DESC') {
$query = search_parse_query($keywords);

if ($query[2] == '') {
form_set_error('keys', t('You must include at least one positive keyword with %count characters or more.', array('%count' => variable_get('minimum_word_size', 3))));
}
if ($query === NULL || $query[0] == '' || $query[2] == '') {
return array();
}

// First pass: select all possible matching sids, doing a simple index-based OR matching on the keywords.
// 'matches' is used to reject those items that cannot possibly match the query.
$conditions = $where1 .' AND ('. $query[2] .") AND i.type = '%s'";
$arguments = array_merge($arguments1, $query[3], array($type, $query[4]));

//----G // Temporary table not allowed.

//$result = db_query_temporary("SELECT i.type, i.sid, SUM(i.score * t.count) AS relevance, COUNT(*) AS matches FROM {search_index} i INNER JOIN {search_total} t ON i.word = t.word $join1 WHERE $conditions GROUP BY i.type, i.sid HAVING COUNT(*) >= %d", $arguments, 'temp_search_sids');

$result = db_query("CREATE TABLE IF NOT EXISTS temp_search_sids SELECT i.type, i.sid, SUM(i.score * t.count) AS relevance, COUNT(*) AS matches FROM {search_index} i INNER JOIN {search_total} t ON i.word = t.word $join1 WHERE $conditions GROUP BY i.type, i.sid HAVING COUNT(*) >= %d", $arguments);

// Calculate maximum relevance, to normalize it
$normalize = db_result(db_query('SELECT MAX(relevance) FROM temp_search_sids'));
if (!$normalize) {
return array();
}
$select2 = str_replace('i.relevance', '('. (1.0 / $normalize) .' * i.relevance)', $select2);

// Second pass: only keep items that match the complicated keywords conditions (phrase search, negative keywords, ...)
$conditions = '('. $query[0] .')';
$arguments = array_merge($arguments2, $query[1]);
//----G // Temporary table not allowed.
//$result = db_query_temporary("SELECT i.type, i.sid, $select2 FROM temp_search_sids i INNER JOIN {search_dataset} d ON i.sid = d.sid AND i.type = d.type $join2 WHERE $conditions $sort_parameters", $arguments, 'temp_search_results');

$result = db_query("CREATE TABLE IF NOT EXISTS temp_search_results SELECT i.type, i.sid, $select2 FROM temp_search_sids i INNER JOIN {search_dataset} d ON i.sid = d.sid AND i.type = d.type $join2 WHERE $conditions $sort_parameters", $arguments);

if (($count = db_result(db_query('SELECT COUNT(*) FROM temp_search_results'))) == 0) {
return array();
}
$count_query = "SELECT $count";

// Do actual search query
$result = pager_query("SELECT * FROM temp_search_results", 10, 0, $count_query);
$results = array();
while ($item = db_fetch_object($result)) {
$results[] = $item;
}
//----G // Temporary table not allowed.
db_query('DELETE LOW_PRIORITY FROM temp_search_sids');
db_query('DELETE LOW_PRIORITY FROM temp_search_results');
return $results;
}


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Buon lavoro

30013