Extmdcd User-Dcfincd Tudcxiug wit.h Application to Tm tual Databases
نویسندگان
چکیده
A number of application-specific searching mechanisms, including keyword searching in textual databases, can he implemented naturally in a relational DIIMS using abst.rnct clat.atypes and user-defined operators. For qur:~-y efficicucy these operators and abstract datat,ypes must be supported by indices. A new indexing scheme is p~.oposcd which allows 3 large class of query predicAea 14~ bc evaluated using indices, including ma11y key opc.rntors for textual dat,ahnses. The iudexing s:( heme ;11so significantly reduces the spa.ce required to store iudcxcd textual tlat,a in a rclntioun.1 database system.
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تاریخ انتشار 1998