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20140805.boardcol.2.php
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			<?php

			// Was PhabricatorEdgeConfig::TYPE_COLUMN_HAS_OBJECT
			$type_has_object = 44;

			$column = new PhabricatorProjectColumn();
			$conn_w = $column->establishConnection('w');

			$rows = queryfx_all(
			$conn_w,
			'SELECT src, dst FROM %T WHERE type = %d',
			PhabricatorEdgeConfig::TABLE_NAME_EDGE,
			$type_has_object);

			$cols = array();
			foreach ($rows as $row) {
			$cols[$row['src']][] = $row['dst'];
			}

			$sql = array();
			foreach ($cols as $col_phid => $obj_phids) {
			echo pht("Migrating column '%s'...", $col_phid)."\n";
			$column = id(new PhabricatorProjectColumn())->loadOneWhere(
			'phid = %s',
			$col_phid);
			if (!$column) {
			echo pht("Column '%s' does not exist.", $col_phid)."\n";
			continue;
			}

			$sequence = 0;
			foreach ($obj_phids as $obj_phid) {
			$sql[] = qsprintf(
			$conn_w,
			'(%s, %s, %s, %d)',
			$column->getProjectPHID(),
			$column->getPHID(),
			$obj_phid,
			$sequence++);
			}
			}

			echo pht('Inserting rows...')."\n";
			foreach (PhabricatorLiskDAO::chunkSQL($sql) as $chunk) {
			queryfx(
			$conn_w,
			'INSERT INTO %T (boardPHID, columnPHID, objectPHID, sequence)
			VALUES %LQ',
			id(new PhabricatorProjectColumnPosition())->getTableName(),
			$chunk);
			}

			echo pht('Done.')."\n";