pgsql: Use key and partdesc from PartitionDispatch where possible.

Use key and partdesc from PartitionDispatch where possible. Instead of repeatedly fishing the data out of the relcache entry, let's use the version that we cached in the PartitionDispatch. We could alternatively rip out the PartitionDispatch fields altogether, but it doesn't make much sense to ha

pgsql: Fix grammar in README.tuplock

Fix grammar in README.tuplock Author: Brad DeJong Discussion: https://postgr.es/m/cajnrtnxra4fqzi0z6kgpqkmizkwv2xxgsdq+hv1jdrf8wck...@mail.gmail.com Branch -- master Details --- https://git.postgresql.org/pg/commitdiff/8a9b72c3ea40c1ca1094bdcfd21a5263aee806f2 Modified Files ---

pgsql: Reduce path length for locking leaf B-tree pages during insertio

Reduce path length for locking leaf B-tree pages during insertion In our B-tree implementation appropriate leaf page for new tuple insertion is acquired using _bt_search() function. This function always returns leaf page locked in shared mode. In order to obtain exclusive lock, caller have to re