Serializability Violations
Two actions conflict when 2 xacts access the same item:
- W-R conflict: T2 reads something T1 wrote; T1 still active
- R-W and W-W conflicts: Similar.
WR conflict (dirty read):
- Result is not equal to any serial execution!
- T2 reads what T1 wrote, but it shouldn’t have!!
transfer $100 from A to B
Database is inconsistent!