From: | tgl(at)postgresql(dot)org (Tom Lane) |
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To: | pgsql-committers(at)postgresql(dot)org |
Subject: | pgsql-server/src backend/executor/nodeHashjoin ... |
Date: | 2003-01-27 20:51:54 |
Message-ID: | 20030127205154.8247A476ABA@postgresql.org |
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Lists: | pgsql-committers |
CVSROOT: /cvsroot
Module name: pgsql-server
Changes by: tgl(at)postgresql(dot)org 03/01/27 15:51:54
Modified files:
src/backend/executor: nodeHashjoin.c nodeNestloop.c
src/backend/nodes: list.c
src/backend/optimizer/path: costsize.c joinpath.c
src/backend/optimizer/util: pathnode.c
src/backend/utils/adt: selfuncs.c
src/include/nodes: pg_list.h
src/include/optimizer: cost.h
src/test/regress/expected: subselect.out
Log message:
Upgrade cost estimation for joins, per discussion with Bradley Baetz.
Try to model the effect of rescanning input tuples in mergejoins;
account for JOIN_IN short-circuiting where appropriate. Also, recognize
that mergejoin and hashjoin clauses may now be more than single operator
calls, so we have to charge appropriate execution costs.
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