Bishwaranjan Bhattacharjee Lipyeow Lim Timothy Malkemus George A. Mihaila Ken Ross Sherman Lau Cathy McCarthur Zoltan Toth Reza Sherkat Efficient Index Compression in DB2 LUW. 1462-1473 2009 2 PVLDB 2 http://www.vldb.org/pvldb/2/vldb09-798.pdf db/journals/pvldb/pvldb2.html#BhattacharjeeLMMRLMTS09