Extractor:A Query-Reformulation Embedded Efficient Keyword Search System over Relational Databases
Wang Xin-ju · Dianzi xuebao · 2014
Keyword Search over Relational Databases(KSORD),a more straightforward and user-friendly way of retriving data in relational databases,has raised much attention and been widely studied in recent years.However,there are still some problems in the existing techniques.To solve these problems,Extractor,a new KSORD system based on datagraph,is proposed in this paper.The datagraph used by Extractor is derived from exiting datagraphs,which has been improved a lot and the new features are the bases of the new generating and ranking mechanism of result trees used in Extracor.The interactive query-reformulation method based on word co- occurence is also embedded in Extractor to help users find the right query.Experiments verify the effectiveness and efficiency of Extractor.