Any long field based on index database compressed by many methods of compresses. The size of the index file has been decreased and the fast seek on indexed field has not been influenced. The system behaves compare and priority functions.
Wang Lancheng. THE COMPRESSES OF INDEX DATA AND THE DEVELOPMENT OF RETRIEVAL SYSTEM. New Technology of Library and Information Service, 1995, 11(5): 7-9.
https://manu44.magtech.com.cn/Jwk_infotech_wk3/EN/10.11925/infotech.1003-3513.1995.05.02 OR https://manu44.magtech.com.cn/Jwk_infotech_wk3/EN/Y1995/V11/I5/7