public function preExecute(SelectInterface $query = NULL) { // If no query object is passed in, use $this. if (!isset($query)) { $query = $this; } return $this->query->preExecute($query); }
/** * Generates a hash from a query object, to be used as part of the cache key. * * This smart caching strategy saves Drupal from querying and rendering to * HTML when the underlying query is unchanged. * * Expensive queries should use the query builder to create the query and then * call this function. Executing the query and formatting results should * happen in a #pre_render callback. * * @param \Drupal\Core\Database\Query\SelectInterface $query * A select query object. * * @return string * A hash of the query arguments. */ public static function keyFromQuery(SelectInterface $query) { $query->preExecute(); $keys = array((string) $query, $query->getArguments()); return hash('sha256', serialize($keys)); }
/** * Creates a temporary table from a select query. * * Will return the name of a table containing the item IDs of all results, or * FALSE on failure. * * @param \Drupal\Core\Database\Query\SelectInterface $db_query * The select query whose results should be stored in the temporary table. * * @return string|false * The name of the temporary table, or FALSE on failure. */ protected function getTemporaryResultsTable(SelectInterface $db_query) { // We only need the id field, not the score. $fields = &$db_query->getFields(); unset($fields['score']); if (count($fields) != 1 || !isset($fields['item_id'])) { $this->getLogger()->warning('Error while adding facets: only "item_id" field should be used, used are: @fields.', array('@fields' => implode(', ', array_keys($fields)))); return FALSE; } $expressions = &$db_query->getExpressions(); $expressions = array(); $db_query->distinct(); if (!$db_query->preExecute()) { return FALSE; } $args = $db_query->getArguments(); return $this->database->queryTemporary((string) $db_query, $args); }
/** * Creates a temporary table from a select query. * * Will return the name of a table containing the item IDs of all results, or * FALSE on failure. * * @param \Drupal\Core\Database\Query\SelectInterface $db_query * The select query whose results should be stored in the temporary table. * * @return string|false * The name of the temporary table, or FALSE on failure. */ protected function getTemporaryResultsTable(SelectInterface $db_query) { // We only need the id field, not the score. $fields =& $db_query->getFields(); unset($fields['score']); if (count($fields) != 1 || !isset($fields['item_id'])) { $this->getLogger()->warning('Error while adding facets: only "item_id" field should be used, used are: @fields.', array('@fields' => implode(', ', array_keys($fields)))); return FALSE; } $expressions =& $db_query->getExpressions(); $expressions = array(); // If there's a GROUP BY for item_id, we leave that, all others need to be // discarded. $group_by =& $db_query->getGroupBy(); $group_by = array_intersect_key($group_by, array('t.item_id' => TRUE)); $db_query->distinct(); if (!$db_query->preExecute()) { return FALSE; } $args = $db_query->getArguments(); try { $result = $this->database->queryTemporary((string) $db_query, $args); } catch (\PDOException $e) { watchdog_exception('search_api', $e, '%type while trying to create a temporary table: @message in %function (line %line of %file).'); return FALSE; } return $result; }