[GSoC] Question about "Explicitly support predicate locks in indexaccess methods besides btree" - Mailing list pgsql-hackers

Hi guys,

I'm confused about the this function, CheckForSerializableConflictOut(...). Can anyone help me out?

It seems like this function is used to check the rw-antidependencies out edge. This should be done when reading a written tuple. But btree does not call this function at all. The heapam used predicatelockpage(...)...

I use to think the in and out edge will be built when rw-antidependencies detected. CheckForSerializableConflictIn(...) can do this job. So CheckForSerializableConflictOut(...) function really confused me.

Best Wishes!

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Dong