20140731.cancdn.php
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			<?php

			$table = new PhabricatorFile();
			$conn_w = $table->establishConnection('w');
			foreach (new LiskMigrationIterator($table) as $file) {
			$id = $file->getID();
			echo pht('Updating flags for file %d...', $id)."\n";
			$meta = $file->getMetadata();
			if (!idx($meta, 'canCDN')) {

			$meta['canCDN'] = true;

			queryfx(
			$conn_w,
			'UPDATE %T SET metadata = %s WHERE id = %d',
			$table->getTableName(),
			json_encode($meta),
			$id);
			}
			}

phab/resources/sql/autopatches/20140731.cancdn.php57f016b166destable