PHP SelectQuery::addTable方法代码示例

 /**
  * Constructor.
  * @param object Id $setId The Id of this set.
  * @param integer $dbIndex The index of the database connection which has
  * 		tables in which to store the set.
  */
 function PersistentOrderedSet($setId, $dbIndex)
 {
     parent::OrderedSet($setId);
     ArgumentValidator::validate($dbIndex, IntegerValidatorRule::getRule(), true);
     // Create our internal array
     $this->_dbIndex = $dbIndex;
     // populate our array with any previously stored items.
     $query = new SelectQuery();
     $query->addColumn("item_order", "item_order");
     $query->addColumn("item_id", "item_id");
     $query->addTable("sets");
     $query->addWhere("id = '" . addslashes($this->_setId->getIdString()) . "'");
     $query->addOrderBy("item_order");
     $dbHandler = Services::getService("DatabaseManager");
     $result = $dbHandler->query($query, $this->_dbIndex);
     $i = 0;
     $oldItems = array();
     while ($result->hasMoreRows()) {
         // Add the items to our array
         $this->_items[$i] = $result->field("item_id");
         // Store an array of the order-key/value relationships to reference
         // when updating any inconsistancies in order numbering.
         $oldItems[$result->field("item_order")] = $result->field("item_id");
         $i++;
         $result->advanceRow();
     }
     $result->free();
     // Make sure that we have our set is filled from 0 to count()
     reset($oldItems);
     $this->_updateOrders($oldItems);
 }

 /**
  * Answer an array of all of the themes known to this source
  * 
  * @return array of Harmoni_Gui2_ThemeInterface
  * @access public
  * @since 5/6/08
  */
 public function getThemes()
 {
     $themes = array();
     $query = new SelectQuery();
     $query->addTable('segue_site_theme');
     $query->addColumn('id');
     $query->addWhereEqual('fk_site', $this->getSiteId());
     $dbMgr = Services::getService("DatabaseManager");
     $result = $dbMgr->query($query, $this->databaseIndex);
     while ($result->hasNext()) {
         $row = $result->next();
         $themes[] = new Segue_Gui2_SiteTheme($this->databaseIndex, $row['id']);
     }
     $result->free();
     return $themes;
 }

 /**
  * Since the agent manager package already has support for filtering agents and
  * groups from traversal info iterators, return our search results as traversal
  * info.
  * 
  * @param string $criteria
  * @return TraversalInfoIterator
  * @access protected
  * @since 1/31/08
  */
 protected function getMatching($criteria)
 {
     $dbc = Services::getService('DatabaseManager');
     $idMgr = Services::getService('Id');
     $query = new SelectQuery();
     $query->addTable('agent_properties');
     $query->addColumn("DISTINCT fk_object_id", "agent_id");
     $query->addWhereLike("property_value", str_replace('*', '%', $criteria));
     $info = array();
     $result = $dbc->query($query, $this->databaseIndex);
     while ($result->hasNext()) {
         $row = $result->next();
         if (!strlen($row['agent_id'])) {
             throw new OperationFailedException("No valid agent_id found in row for query: " . $query->asString());
         }
         $info[] = new HarmoniTraversalInfo($idMgr->getId($row['agent_id']), '', 0);
     }
     return new HarmoniTraversalInfoIterator($info);
 }

 /**
  * Will load the data structures for multiple {@link Schema}s.
  * @param ref object An array containing the list of types IDs to be loaded.
  * @return void
  * @access public
  */
 function loadMultiple($preloadTypes)
 {
     $ids = $preloadTypes;
     if (count($ids)) {
         // let's do it
         $query = new SelectQuery();
         $query->addTable("dm_schema_field");
         $query->addColumn("id", "id", "dm_schema_field");
         $query->addColumn("name", "label", "dm_schema_field");
         $query->addColumn("mult", "mult", "dm_schema_field");
         $query->addColumn("required", "required", "dm_schema_field");
         $query->addColumn("active", "active", "dm_schema_field");
         $query->addColumn("fieldtype", "fieldtype", "dm_schema_field");
         $query->addColumn("fk_schema", "fk_schema", "dm_schema_field");
         $wheres = array();
         foreach ($ids as $id) {
             $wheres[] = "fk_schema='" . addslashes($id) . "'";
         }
         $query->setWhere("(" . implode(" OR ", $wheres) . ")");
         //			print "<PRE>".MySQL_SQLGenerator::generateSQLQuery($query)."</PRE>";
         $dbHandler = Services::getService("DatabaseManager");
         $res = $dbHandler->query($query, DATAMANAGER_DBID);
         $rows = array();
         while ($res->hasMoreRows()) {
             $row = $res->getCurrentRow();
             $res->advanceRow();
             $theID = $row["fk_schema"];
             if (!isset($rows[$theID])) {
                 $rows[$theID] = array();
             }
             $rows[$theID][] = $row;
         }
         $res->free();
         //			printpre($rows);
         // now distribute the rows among their respective objects
         foreach (array_keys($rows) as $id) {
             $obj = $this->getSchema($id);
             if (!$obj->loaded()) {
                 $obj->populate($rows[$id]);
             }
         }
     }
 }

 /**
  * Answer the PartStructure Ids for which Tags should be auto-generated, in
  * the given repository.
  * 
  * @param object Id $repositoryId
  * @return object IdIterator
  * @access public
  * @since 11/21/06
  */
 function getPartStructureIdsForTagGeneration($repositoryId)
 {
     if (!isset($this->_cache[$repositoryId->getIdString()])) {
         $this->_cache[$repositoryId->getIdString()] = array();
         $query = new SelectQuery();
         $query->addColumn('fk_partstruct');
         $query->addTable('tag_part_map');
         $query->addWhere("fk_repository ='" . addslashes($repositoryId->getIdString()) . "'");
         $dbc = Services::getService("DatabaseManager");
         $result = $dbc->query($query, $this->getDatabaseIndex());
         // Add tag objects to an array, still sorted by frequency of usage
         $idManager = Services::getService('Id');
         while ($result->hasNext()) {
             $row = $result->next();
             $this->_cache[$repositoryId->getIdString()][] = $idManager->getId($row['fk_partstruct']);
         }
     }
     $iterator = new HarmoniIterator($this->_cache[$repositoryId->getIdString()]);
     return $iterator;
 }

 /**
  * Update the value for this Part.
  * 
  * @param object mixed $value (original type: java.io.Serializable)
  * 
  * @throws object RepositoryException An exception with one of
  *		   the following messages defined in
  *		   org.osid.repository.RepositoryException may be thrown: {@link
  *		   org.osid.repository.RepositoryException#OPERATION_FAILED
  *		   OPERATION_FAILED}, {@link
  *		   org.osid.repository.RepositoryException#PERMISSION_DENIED
  *		   PERMISSION_DENIED}, {@link
  *		   org.osid.repository.RepositoryException#CONFIGURATION_ERROR
  *		   CONFIGURATION_ERROR}, {@link
  *		   org.osid.repository.RepositoryException#UNIMPLEMENTED
  *		   UNIMPLEMENTED}, {@link
  *		   org.osid.repository.RepositoryException#NULL_ARGUMENT
  *		   NULL_ARGUMENT}
  * 
  * @access public
  */
 function updateValue($value)
 {
     ArgumentValidator::validate($value, StringValidatorRule::getRule());
     // Store the size in the object in case its asked for again.
     try {
         $size = ByteSize::fromString($value);
     } catch (InvalidArgumentException $e) {
         $size = ByteSize::withValue(0);
     }
     $this->_size = $size->value();
     // then write it to the database.
     $dbHandler = Services::getService("DatabaseManager");
     // Check to see if the name is in the database
     $query = new SelectQuery();
     $query->addTable("dr_file");
     $query->addColumn("COUNT(*) as count");
     $query->addWhere("id = '" . $this->_recordId->getIdString() . "'");
     $result = $dbHandler->query($query, $this->_configuration->getProperty("database_index"));
     // If it already exists, use an update query.
     if ($result->field("count") > 0) {
         $query = new UpdateQuery();
         $query->setTable("dr_file");
         $query->setColumns(array("size"));
         $query->setValues(array("'" . addslashes($this->_size) . "'"));
         $query->addWhere("id = '" . $this->_recordId->getIdString() . "'");
     } else {
         $query = new InsertQuery();
         $query->setTable("dr_file");
         $query->setColumns(array("id", "size"));
         $query->setValues(array("'" . $this->_recordId->getIdString() . "'", "'" . addslashes($this->_size) . "'"));
     }
     $result->free();
     // run the query
     $dbHandler->query($query, $this->_configuration->getProperty("database_index"));
     $this->_asset->updateModificationDate();
 }

 /**
  * Test dynamic SELECT WHERE IN queries
  * 
  * @param object $db
  * @param array $testSet
  * @return void
  * @access public
  * @since 4/7/08
  */
 public function testDBHandler($dbHandler, array $testSet)
 {
     foreach ($testSet as $id) {
         $query = new SelectQuery();
         $query->addColumn('*');
         $query->addTable('log_entry');
         $query->addWhereEqual('id', $id);
         $result = $dbHandler->query($query);
         while ($result->hasNext()) {
             $row = $result->next();
         }
         $result->free();
         // 			printpre($result);
     }
 }

 /**
  * Sychronize the cache. Remove any nodes from the cache whose AZs may have 
  * changed.
  * 
  * @return void
  * @access public
  * @since 12/20/05
  */
 function _synchronizeCache()
 {
     $dbHandler = Services::getService("DBHandler");
     foreach (array_keys($_SESSION['__isAuthorizedCacheAgents']) as $agentIdString) {
         // Select the nodeIds who's authorization situation may have changed
         // since the cache was last synchronized. Clear these Ids from the cache.
         $query = new SelectQuery();
         $query->addTable("az2_node");
         $query->setColumns(array("id"));
         $dbDate = $dbHandler->toDBDate($_SESSION['__isAuthorizedCacheTime'][$agentIdString], $this->_configuration->getProperty('database_index'));
         $query->addWhere("last_changed > " . $dbDate);
         // 		printpre(MySQL_SQLGenerator::generateSQLQuery($query));
         $result = $dbHandler->query($query, $this->_configuration->getProperty('database_index'));
         while ($result->hasMoreRows()) {
             unset($_SESSION['__isAuthorizedCache'][$agentIdString][$result->field("id")]);
             $result->advanceRow();
         }
         $result->free();
         $_SESSION['__isAuthorizedCacheTime'][$agentIdString] = DateAndTime::now();
     }
 }

 function _getCourseOffering($can, $term, $courseString)
 {
     //$num = substr($courseString,4,4);
     $number = substr($courseString, 0, strlen($courseString) - 5);
     $termId = $term->getId();
     $dbHandler = Services::getService("DBHandler");
     $query = new SelectQuery();
     $query->addTable('cm_offer');
     $query->addWhere("number='" . addslashes($number) . "'");
     $query->addWhere("fk_cm_term='" . addslashes($termId->getIdString()) . "'");
     $query->addColumn('id');
     $res = $dbHandler->query($query);
     if ($res->getNumberOfRows() == 0) {
         $deftype1 = new Type("CourseOfferingType", "edu.middlebury", "LDAP");
         $deftype2 = new Type("CourseOfferingStatusType", "edu.middlebury", "LDAP");
         $deftype3 = new Type("GradeType", "edu.middlebury", "LDAP");
         $offer = $can->createCourseOffering($number, $number, "", $termId, $deftype1, $deftype2, $deftype3);
         //	print "<font size=3 color='red'>#</font>\n";
         return $offer;
     } else {
         //print " ";
         $row = $res->getCurrentRow();
         $cm = Services::getService("CourseManagement");
         $idManager = Services::getService("Id");
         $id = $idManager->getId($row['id']);
         $offer = $cm->getCourseOffering($id);
         //print "<font size=3>#</font>\n";
         return $offer;
     }
 }

 /**
  * Update a record table for a set of harvesters and repositories
  * 
  * @param string $table
  * @param array $allowedRepositoryIdStrings
  * @param array $authGroupIdStrings	The ids of the groups to check view authorization for,
  *	May be one of the following or another group Id string:
  *		edu.middlebury.agents.everyone
  *		edu.middlebury.agents.all_agents
  *	If empty, all assets in the specified repositories will be added regardless of
  *	their visibility.
  *
  * @return void
  * @access public
  * @since 3/9/07
  */
 function updateTable($table, $allowedRepositoryIdStrings, $authGroupIdStrings)
 {
     ArgumentValidator::validate($table, StringValidatorRule::getRule());
     ArgumentValidator::validate($allowedRepositoryIdStrings, ArrayValidatorRuleWithRule::getRule(StringValidatorRule::getRule()));
     ArgumentValidator::validate($authGroupIdStrings, ArrayValidatorRuleWithRule::getRule(StringValidatorRule::getRule()));
     $harmoni = Harmoni::instance();
     $config = $harmoni->getAttachedData('OAI_CONFIG');
     $repositoryManager = Services::getService('Repository');
     $authorizationManager = Services::getService('AuthZ');
     $idManager = Services::getService("IdManager");
     $dbc = Services::getService("DatabaseManager");
     $authGroupIds = array();
     foreach ($authGroupIdStrings as $id) {
         $authGroupIds[] = $idManager->getId($id);
     }
     $baseCheckQuery = new SelectQuery();
     $baseCheckQuery->addTable('oai_' . $table);
     $baseCheckQuery->addColumn('datestamp');
     $baseCheckQuery->addColumn('deleted');
     $baseUpdateQuery = new UpdateQuery();
     $baseUpdateQuery->setTable('oai_' . $table);
     $baseUpdateColumns = array('datestamp', 'deleted', 'oai_set', 'dc_title', 'dc_description');
     $dcUpdateColumns = array('datestamp', 'deleted', 'oai_set', 'dc_title', 'dc_description', 'dc_creator', 'dc_subject', 'dc_contributor', 'dc_publisher', 'dc_date', 'dc_type', 'dc_format', 'dc_identifier', 'dc_source', 'dc_language', 'dc_relation', 'dc_coverage', 'dc_rights');
     $baseInsertQuery = new InsertQuery();
     $baseInsertQuery->setTable('oai_' . $table);
     $baseInsertColumns = array('datestamp', 'oai_identifier', 'deleted', 'oai_set', 'dc_title', 'dc_description');
     $dcInsertColumns = array('datestamp', 'oai_identifier', 'deleted', 'oai_set', 'dc_title', 'dc_description', 'dc_creator', 'dc_subject', 'dc_contributor', 'dc_publisher', 'dc_date', 'dc_type', 'dc_format', 'dc_identifier', 'dc_source', 'dc_language', 'dc_relation', 'dc_coverage', 'dc_rights');
     $baseDeleteQuery = new UpdateQuery();
     $baseDeleteQuery->setTable('oai_' . $table);
     $baseDeleteQuery->addValue('deleted', 'true');
     $baseDeleteQuery->addRawValue('datestamp', 'NOW()');
     $baseUndeleteQuery = new UpdateQuery();
     $baseUndeleteQuery->setTable('oai_' . $table);
     $baseUndeleteQuery->addValue('deleted', 'false');
     $baseUndeleteQuery->addRawValue('datestamp', 'NOW()');
     $forceUpdate = false;
     $repositories = $repositoryManager->getRepositories();
     $r = 0;
     if (count($allowedRepositoryIdStrings)) {
         $numR = count($allowedRepositoryIdStrings);
     } else {
         $numR = $repositories->count();
     }
     $numUpdates = 0;
     $numDeleted = 0;
     $message = _('Updating OAI records for repository (%1 of %2) : ');
     $message = str_replace('%2', $numR, $message);
     $instituteId = $idManager->getId('edu.middlebury.agents.users');
     $viewId = $idManager->getId('edu.middlebury.authorization.view');
     require_once HARMONI . "/utilities/Timer.class.php";
     $timer = new Timer();
     $timer->start();
     $existingRepositoryIds = array();
     while ($repositories->hasNext()) {
         $updatesInRepository = 0;
         $repository = $repositories->next();
         $repositoryId = $repository->getId();
         // Only work with allowed repositories
         if (count($allowedRepositoryIdStrings) && !in_array($repositoryId->getIdString(), $allowedRepositoryIdStrings)) {
             continue;
         }
         $r++;
         $existingRepositoryIds[] = $repositoryId->getIdString();
         $assets = $repository->getAssets();
         $status = new CLIStatusStars(str_replace('%1', $r, $message) . $repository->getDisplayName());
         $status->initializeStatistics($assets->count());
         $existingAssetIds = array();
         while ($assets->hasNext()) {
             $asset = $assets->next();
             $assetId = $asset->getId();
             $existingAssetIds[] = $assetId->getIdString();
             try {
                 $modificationDate = $asset->getModificationDate();
             } catch (UnimplementedException $e) {
                 $modificationDate = DateAndTime::now();
             }
             $query = $baseCheckQuery->copy();
             $query->addWhereEqual("oai_set", $repositoryId->getIdString());
             $query->addWhereEqual("oai_identifier", $assetId->getIdString());
             $result = $dbc->query($query, $config->getProperty('OAI_DBID'));
             if (!$result->getNumberOfRows()) {
                 // 					printpre("Doesn't exist:\t".$asset->getDisplayName()."");
                 $query = $baseInsertQuery->copy();
                 $query->addValue('oai_set', $repositoryId->getIdString());
//.........这里部分代码省略.........

 /**
  * Create a select query with table joins.
  * 
  * @return object SelectQuery
  * @access private
  * @since 3/9/05
  */
 function _createSelectQuery()
 {
     $query = new SelectQuery();
     $query->addTable($this->_mappingTable);
     $query->addTable($this->_typeTable, LEFT_JOIN, $this->_mappingTable . '.fk_type=' . $this->_typeTable . '.id');
     $query->addColumn('agent_id');
     $query->addColumn('token_identifier');
     $query->addColumn('domain');
     $query->addColumn('authority');
     $query->addColumn('keyword');
     $query->addColumn('description');
     return $query;
 }

 /**
  * @return array
  * @param string $type The Schema type to look for.
  * Returns an array of DMRecord IDs that are of the Schema type $type.
  */
 function getRecordIDsByType($type)
 {
     // we're going to get all the IDs that match a given type.
     $query = new SelectQuery();
     $query->addTable("dm_record");
     $query->addTable("dm_schema", INNER_JOIN, "dm_schema.id=dm_record.fk_schema");
     $query->addColumn("id", "", "dm_record");
     $query->setWhere("dm_schema.id='" . addslashes($type) . "'");
     $dbHandler = Services::getService("DatabaseManager");
     $result = $dbHandler->query($query, DATAMANAGER_DBID);
     if (!$result) {
         throwError(new UnknownDBError("RecordManager"));
         return false;
     }
     $array = array();
     while ($result->hasMoreRows()) {
         $array[] = $result->field(0);
         $result->advanceRow();
     }
     $result->free();
     return $array;
 }

 /**
  * Tests the generateSQLQuery() without WHERE clause.
  */
 function test()
 {
     // insert one row
     $query = new InsertQuery();
     $query->setTable("test1");
     $query->setColumns(array("value"));
     $query->addRowOfValues(array("'Spaceboy'"));
     $query->setAutoIncrementColumn("id", "test1_id_seq");
     $result = $this->db->query($query);
     $lastId = $result->getLastAutoIncrementValue();
     // insert it again, the id must have increased by one
     $result = $this->db->query($query);
     $this->assertIdentical($result->getNumberOfRows(), 1);
     $this->assertIdentical($result->getLastAutoIncrementValue(), $lastId + 1);
     // add several rows at the same time
     $query->addRowOfValues(array("'Astrogirl'"));
     $result = $this->db->query($query);
     $this->assertIdentical($result->getLastAutoIncrementValue(), $lastId + 3);
     // now insert in the other test table
     $query = new InsertQuery();
     $query->setTable("test");
     $query->setColumns(array("FK", "value"));
     $query->addRowOfValues(array($lastId, "'Ziggy'"));
     $query->addRowOfValues(array($lastId + 1, "'Lost in the Stars'"));
     $query->addRowOfValues(array($lastId + 2, "'Headstar'"));
     $query->addRowOfValues(array($lastId + 3, "'Stardust'"));
     $query->setAutoIncrementColumn("id", "test1_id_seq");
     $result = $this->db->query($query);
     // join the inserted rows
     $query = new SelectQuery();
     $query->addTable("test1");
     $query->addTable("test", INNER_JOIN, "test.FK = test1.id");
     $query->addColumn("id", "dm86_id", "test");
     $query->addColumn("FK", "dm86_fk", "test");
     $query->addColumn("value", "dm86_value", "test");
     $query->addColumn("id", "dm98_id", "test1");
     $query->addColumn("value", "dm98_value", "test1");
     $query->addWhere("test1.id >= " . $lastId);
     $result = $this->db->query($query);
     $this->assertIdentical($result->getNumberOfRows(), 4);
     $this->assertIdentical((int) $result->field("dm86_fk"), $lastId);
     $this->assertIdentical($result->field("dm86_value"), "Ziggy");
     $this->assertIdentical((int) $result->field("dm98_id"), $lastId);
     $this->assertIdentical($result->field("dm98_value"), "Spaceboy");
     $result->advanceRow();
     $this->assertIdentical((int) $result->field("dm86_fk"), $lastId + 1);
     $this->assertIdentical($result->field("dm86_value"), "Lost in the Stars");
     $this->assertIdentical((int) $result->field("dm98_id"), $lastId + 1);
     $this->assertIdentical($result->field("dm98_value"), "Spaceboy");
     $result->advanceRow();
     $this->assertIdentical((int) $result->field("dm86_fk"), $lastId + 2);
     $this->assertIdentical($result->field("dm86_value"), "Headstar");
     $this->assertIdentical((int) $result->field("dm98_id"), $lastId + 2);
     $this->assertIdentical($result->field("dm98_value"), "Spaceboy");
     $result->advanceRow();
     $this->assertIdentical((int) $result->field("dm86_fk"), $lastId + 3);
     $this->assertIdentical($result->field("dm86_value"), "Stardust");
     $this->assertIdentical((int) $result->field("dm98_id"), $lastId + 3);
     $this->assertIdentical($result->field("dm98_value"), "Astrogirl");
     $result->free();
     $query = new UpdateQuery();
     $query->setTable("test1");
     $query->setColumns(array("value"));
     $query->setValues(array("'I changed you MF!'"));
     $query->addWhere("id = " . $lastId);
     $result = $this->db->query($query);
     $this->assertIdentical($result->getNumberOfRows(), 1);
     $query = new SelectQuery();
     $query->addTable("test1");
     $query->addColumn("value");
     $query->addWhere("test1.id = " . $lastId);
     $result = $this->db->query($query);
     $this->assertIdentical($result->getNumberOfRows(), 1);
     $this->assertIdentical($result->field("value"), "I changed you MF!");
     $result->free();
     $query = new DeleteQuery();
     $query->setTable("test1");
     $query->addWhere("id = " . $lastId);
     $result = $this->db->query($query);
     $this->assertIdentical($result->getNumberOfRows(), 1);
     $query = new SelectQuery();
     $query->addTable("test1");
     $query->addColumn("value");
     $query->addWhere("test1.id = " . $lastId);
     $result = $this->db->query($query);
     $this->assertIdentical($result->getNumberOfRows(), 0);
     $result->free();
 }

 /**
  * Answer an array of all of the property keys inexistance
  * 
  * @return array
  * @access public
  * @since 11/1/05
  */
 function getAllPropertyKeys()
 {
     $propertyKeys = array();
     $dbHandler = Services::getService("DBHandler");
     //select the propertykeys
     $query = new SelectQuery();
     $query->addTable("agent_properties");
     $query->addColumn("DISTINCT property_key");
     // 		$query->addTable("type", LEFT_JOIN, "agent_properties.fk_type_id=type.type_id");
     // 		$query->addColumn("property_key");
     // 		$query->addColumn("type_domain");
     // 		$query->addColumn("type_authority");
     // 		$query->addColumn("type_keyword");
     // 		$query->addColumn("type_description");
     $query->addOrderBy("property_key");
     $result = $dbHandler->query($query, $this->_dbIndex);
     while ($result->hasMoreRows()) {
         $propertyKeys[] = $result->field('property_key');
         // 			$propertyKeys[$result->field('property_key')] = new Type(
         // 				$result->field('type_domain'),
         // 				$result->field('type_authority'),
         // 				$result->field('type_keyword'),
         // 				$result->field('type_description'));
         $result->advanceRow();
     }
     $result->free();
     return $propertyKeys;
     //return the properties
 }

 /**
  * Delete the log with the specified name.
  * 
  * @param string $logName
  * 
  * @throws object LoggingException An exception with one of the
  *		   following messages defined in org.osid.logging.LoggingException
  *		   may be thrown:  {@link
  *		   org.osid.logging.LoggingException#UNIMPLEMENTED UNIMPLEMENTED},
  *		   {@link org.osid.logging.LoggingException#OPERATION_FAILED
  *		   OPERATION_FAILED}, {@link
  *		   org.osid.logging.LoggingException#CONFIGURATION_ERROR
  *		   CONFIGURATION_ERROR}, {@link
  *		   org.osid.logging.LoggingException#PERMISSION_DENIED
  *		   PERMISSION_DENIED}, {@link
  *		   org.osid.logging.LoggingException#UNKNOWN_NAME UNKNOWN_NAME}
  * 
  * @access public
  */
 function deleteLog($logName)
 {
     $log = $this->getLogForWriting($logName);
     $log = null;
     $dbc = Services::getService("DatabaseManager");
     // get the entry Ids
     $query = new SelectQuery();
     $query->addColumn("id");
     $query->addTable("log_entry");
     $query->addWhere("log_name = '" . addslashes($logName) . "'");
     $result = $dbc->query($query, $this->_dbIndex);
     $entryIds = array();
     while ($result->hasMoreRows()) {
         $entryIds[] = "'" . addslashes($result->field("id")) . "'";
         $result->advanceRow();
     }
     $result->free();
     // delete the agent keys
     $query = new DeleteQuery();
     $query->setTable("log_agent");
     $query->addWhere("fk_entry IN (" . implode(", ", $entryIds) . ")");
     $dbc->query($query, $this->_dbIndex);
     // delete the node keys
     $query->setTable("log_node");
     $dbc->query($query, $this->_dbIndex);
     // delete the entries
     $query = new DeleteQuery();
     $query->setTable("log_entry");
     $query->addWhere("log_name = '" . addslashes($logName) . "'");
     $dbc->query($query, $this->_dbIndex);
 }