is::dropIndexes

protected function dropIndexes($certainIndex = false)
{
	$locationTable = LocationLocationTable::getTableName();
	$locationNameTable = LocationNameLocationTable::getTableName();

	$map = array(
		$locationTable => array(
			'IX_B_SALE_LOC_MARGINS',
			'IX_B_SALE_LOC_MARGINS_REV',
			'IX_B_SALE_LOC_PARENT',
			'IX_B_SALE_LOC_DL',
			'IX_B_SALE_LOC_TYPE',

			// old indexes
			'IXS_LOCATION_COUNTRY_ID',
			'IXS_LOCATION_REGION_ID',
			'IXS_LOCATION_CITY_ID',

			// for mssql, the same
			'IX_B_SALE_LOCATION_1',
			'IX_B_SALE_LOCATION_2',
			'IX_B_SALE_LOCATION_3'
		),
		$locationNameTable => 	array('IX_B_SALE_LOC_NAME_NAME_U', 'IX_B_SALE_LOC_NAME_LI_LI')
	);

	foreach($map as $tableName => $indexes)
	{
		foreach($indexes as $index)
		{
			if($certainIndex !== false && $certainIndex != $index)
				continue;

			$this->dropIndexByName($index, $tableName);
		}
	}
}