PHP SelectQuery::range方法代码示例

 /**
  * Get query
  *
  * @return \SelectQueryInterface $query
  */
 public final function getQuery()
 {
     if (null === $this->query) {
         $this->query = $this->buildQuery();
         // Apply conditions.
         foreach ($this->conditions as $statement => $value) {
             $this->applyOperator($this->query, $statement, $value);
         }
         $limit = $this->getLimit();
         if (CursorInterface::LIMIT_NONE !== $limit) {
             $this->query->range($this->getOffset(), $limit);
         }
     }
     return $this->query;
 }

 /**
  * Finishes the query.
  *
  * Adds tags, metaData, range and returns the requested list or count.
  *
  * @param SelectQuery $select_query
  * A SelectQuery which has entity_type, entity_id, revision_id and bundle
  * fields added.
  * @param $id_key
  * Which field's values to use as the returned array keys.
  *
  * @return
  * See EntityFieldQuery::execute().
  */
 function finishQuery($select_query, $id_key = 'entity_id')
 {
     foreach ($this->tags as $tag) {
         $select_query->addTag($tag);
     }
     foreach ($this->metaData as $key => $object) {
         $select_query->addMetaData($key, $object);
     }
     $select_query->addMetaData('entity_field_query', $this);
     if ($this->range) {
         $select_query->range($this->range['start'], $this->range['length']);
     }
     if ($this->count) {
         return $select_query->countQuery()->execute()->fetchField();
     }
     $return = array();
     foreach ($this->fields as $key => $field) {
         if ('field_sql_storage' == $field['storage']['type']) {
             foreach ($select_query->conditions() as $condition) {
                 if (is_array($condition) && array_key_exists('field', $condition) && strpos($condition['field'], 'field_data_' . $field['field_name'] . $key . '.') === 0) {
                     list($table_alias, $column) = explode('.', $condition['field']);
                     $select_query->addField($table_alias, $column, $field['field_name']);
                     break;
                 }
             }
         }
     }
     $this->orderedResults = array();
     foreach ($select_query->execute() as $partial_entity) {
         $bundle = isset($partial_entity->bundle) ? $partial_entity->bundle : NULL;
         $entity = entity_create_stub_entity($partial_entity->entity_type, array($partial_entity->entity_id, $partial_entity->revision_id, $bundle));
         $return[$partial_entity->entity_type][$partial_entity->{$id_key}] = $entity;
         $this->orderedResults[] = $partial_entity;
     }
     return $return;
 }

 /**
  * Set correct page (i.e. range) for the query for list.
  *
  * Determine the page that should be seen. Page 1, is actually offset 0 in the
  * query range.
  *
  * @param \SelectQuery $query
  *   The query object.
  *
  * @throws BadRequestException
  *
  * @see \RestfulEntityBase::getQueryForList
  */
 protected function queryForListPagination(\SelectQuery $query)
 {
     list($range, $offset) = $this->parseRequestForListPagination();
     $query->range($range, $offset);
 }

 public function setLimit($limit)
 {
     $this->selectQuery->range(0, $limit);
 }