1h ago · 4 min read · Behavior Description Assume we are building a KPI management platform. Multiple companies can create accounts (tenants) and let their employees access the platform. A user can be assigned to one or s
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4h ago · 8 min read · Row-level security (RLS) is a database feature that enforces access control at the level of individual rows. Instead of granting or denying access to a whole table, RLS lets you define policies that d
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18h ago · 35 min read · TLDR: Read skew occurs when a transaction reads two logically related objects at different points in time — one before and one after a concurrent transaction commits — producing a view that never existed as a committed whole. Read Committed isolation...
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18h ago · 39 min read · TLDR: A lost update occurs when two concurrent read-modify-write transactions both read the same committed value, both compute a new value from it, and both write back — with the second write silently discarding the first. No error is raised. Both tr...
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18h ago · 30 min read · TLDR: A dirty write occurs when Transaction B overwrites data that Transaction A has written but not yet committed. The result is not a rollback or an error — it is silently inconsistent committed data: one table reflects Transaction B's intent, anot...
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