Postgres System Columns Explained - CTID, XMIN, XMAX

Explore the intricacies of Postgres system columns in this informative video tutorial. Delve into the differences between ctid, xmin, and xmax columns, examining their behavior with read committed and repeatable read isolation levels. Learn about the concept of tuple IDs, minimum and maximum transaction IDs, and their implications in database operations. Gain a deeper understanding of how these system columns function in various scenarios, enhancing your knowledge of PostgreSQL internals and transaction management.

Intro
ctid tuple id
xmin minimum transaction id with read committed
xmin with read committed
xmin with repeatable read
xmax maximum transaction id