Gokulakannan Somasundaram <gokul...@gmail.com> writes:
> Consider Time instances T1, T2, T3, T4

> T1 : session 1 holds the write lock on page p1 and completes the unique
> check on p1, p2 and p3.

> T2 : session 1 releases the lock on p1 (its waiting to acquire a ex lock on
> p2)

That's not what we do.  See _bt_findinsertloc.

                        regards, tom lane

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