*** ICX is renamed as COMBAT!!!***
These demo code apply ICX to work with WAH in bitmap index for FastBit. FastBit is a successful archival data management software using bitmap index to accerlate the query speed.
ICX is a new bitmap index encoding algorithm, it is a descent of COMPAX with newly designed codebook. ICX is the abbreviation of Improved COMPressed Adaptive indeX. In Chinese, it is named as "改进的压缩自适应索引."
Now ICX is renamed as COMBAT, the abbdrevation of "COMbining Binary And Ternary encoding."
ICX or COMBAT performs better compression ratio and fast encoding speed compared with the state-of-the-art bitmap index compression schemes, such as WAH (Word-Aligned-Hybrid), PLWAH(Position list word aligned hybrid) and COMPAX (COMPressed Adaptive indeX).
A detailed survey is introduced in the following papers.
[1] Yinjun Wu, Zhen Chen, Yuhao Wen, Wenxun Zheng, Junwei Cao, COMBAT: A new bitmap index coding algorithm for Big Data, Tsinghua Science & Technology, 21(2), 04/2016.
URL: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7442497
[2] Zhen Chen et al., “A Survey of Bitmap Index Compression Algorithms for Big Data,” Tsinghua Science and Technology, 20(1), pp.100-115, February 2015.
URL: http://ieeexplore.ieee.org/xpls/articleDetails.jsp?arnumber=7040519.