$res = $dbw->select( 'content', 'content_address', [], __METHOD__, [ 'DISTINCT' ] );
$blobStore = MediaWikiServices::getInstance()->getBlobStore();
foreach ( $res as $row ) {
$res = $dbw->select( 'content', 'content_address', [], __METHOD__, [ 'DISTINCT' ] );
$blobStore = MediaWikiServices::getInstance()->getBlobStore();
foreach ( $res as $row ) {