Database system implementation 名词,缩略词

RT( X )  : read time of X

WT( X ) :  write time of X

C( X ) :  commit bit for X



▷◁:join

δ : distinct , the duplicate-elimination operator

γL : grouping  (L在右下角) 

M : the number of main-memory buffers avaiable



Ti : transaction (i在右下角,下同)

Ri(X) : transaction Ti starts ,and its read set is the list of database elements X

Vi : Ti attempts to validate

Wi(X) :Ti finishes ,and its write set wae X 

你可能感兴趣的:(Database system implementation 名词,缩略词)