TruncateSysFileProcessedFileTable.php

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<?php
namespace TYPO3\CMS\Install\Updates;

class TruncateSysFileProcessedFileTable extends AbstractUpdate {

    protected $title = 'Truncate all processed files to clean up obsolete records.';

    public function checkForUpdate(&$description) {
        if ($this->isWizardDone() || !$this->checkIfTableExists('sys_file_processedfile')) {
            return FALSE;
        }

        $description = 'To re-process all files correctly we truncate the table. This will make sure there are no obsolete files in the database.';
        return TRUE;
    }

    public function performUpdate(array &$databaseQueries, &$customMessages) {
        $GLOBALS['TYPO3_DB']->exec_TRUNCATEquery('sys_file_processedfile');
        $databaseQueries[] = $GLOBALS['TYPO3_DB']->debug_lastBuiltQuery;
        $this->markWizardAsDone();
        return TRUE;
    }

}
?>