Can we just update one field of a document in a lucene index, and leave other fields along?

[fulin tang]

if we can update only one field of a document in the index, a lot of
jobs can be done here !


梦的开始挣扎于城市的边缘
心的远方执着在脚步的瞬间
我的宿命埋藏了寂寞的永远