[BUGFIX] Initializer creates wrong queue items with starttime in future

The field "changed" is wrong for records with starttime in future.
This results in a exception on indexing such pages, because the record
have to be indexed not until the starttime is past.
Solution: use greatest value of starttime and tstamp on initializing the
queue.

Resolves: #57890
Releases: 3.0, 2.8
Change-Id: Idf687f8f69c5372e1a73c8a23439c7251bb64521

Author: Mabahe

Classes/IndexQueue/Initializer/Abstract.php

@@ -177,13 +177,17 @@ protected function logInitialization($initializationQuery) {
 	 *
 	 */
 	protected function buildSelectStatement() {
+		$changedField = $GLOBALS['TCA'][$this->type]['ctrl']['tstamp'];
+		if (!empty($GLOBALS['TCA'][$this->type]['ctrl']['enablecolumns']['starttime'])) {
+			$changedField = 'GREATEST(' . $GLOBALS['TCA'][$this->type]['ctrl']['enablecolumns']['starttime'] . ',' . $GLOBALS['TCA'][$this->type]['ctrl']['tstamp'] . ')';
+		}
 		$select = 'SELECT '
 			. '\'' . $this->site->getRootPageId() . '\' as root, '
 			. '\'' . $this->type . '\' AS item_type, '
 			. 'uid AS item_uid, '
 			. '\'' . $this->indexingConfigurationName . '\' as indexing_configuration, '
 			. $this->getIndexingPriority() . ' AS indexing_priority, '
-			. $GLOBALS['TCA'][$this->type]['ctrl']['tstamp'] . ' AS changed';
+			. $changedField . ' AS changed';
 
 		return $select;
 	}