0 votes 0 votes Can anyone explain How to check whether the given tuple relational query is safe or not( any link or blog) saif asked Aug 10, 2018 saif 320 views answer comment Share Follow See all 3 Comments See all 3 3 Comments reply arvin commented Aug 10, 2018 reply Follow Share you can understand it as when you have to find any tuple from a bounded table its safe TRC and when we have to find any tuple from infinity (unbounded table) than its unsafe TRC. 1 votes 1 votes saif commented Aug 11, 2018 reply Follow Share Can you elaborate through a example 0 votes 0 votes arvin commented Aug 11, 2018 reply Follow Share A SAFE EXPRESSION is one that is guaranteed to yield a finite number of tuples as its results. Otherwise, it is called UNSAFE. { t | not(EMPLOYEE) } is UNSAFE! 1 votes 1 votes Please log in or register to add a comment.
0 votes 0 votes https://leopard.in.ua/2016/09/20/safe-and-unsafe-operations-postgresql#.W26VDJ_hU0M Verma Ashish answered Aug 11, 2018 Verma Ashish comment Share Follow See all 0 reply Please log in or register to add a comment.
