topological sort

Let R i (z) and W i (z) denote read and write operations on a data element z by a transaction T i , respectively. Consider the schedule S with four transactions. S : R 4 (x), R 2 (...

Suppose a database schedule $$S$$ involves transactions $${T_1},\,...,\,{T_n}.$$ Construct the precedence graph of $$S$$ with vertices representing the transactions and edges repre...