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From tgl@postgresql.org (Tom Lane)
Subject pgsql-server/src backend/executor/nodeHash.c b ...
Date
Msg-id 20021130000822.987934764CB@postgresql.org
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CVSROOT:    /cvsroot
Module name:    pgsql-server
Changes by:    tgl@postgresql.org    02/11/29 19:08:22

Modified files:
    src/backend/executor: nodeHash.c nodeHashjoin.c
    src/backend/nodes: copyfuncs.c outfuncs.c
    src/backend/optimizer/path: costsize.c joinpath.c
    src/backend/optimizer/plan: createplan.c subselect.c
    src/backend/optimizer/util: pathnode.c
    src/include/executor: hashjoin.h nodeHash.h
    src/include/nodes: execnodes.h plannodes.h relation.h

Log message:
    Upgrade planner and executor to allow multiple hash keys for a hash join,
    instead of only one.  This should speed up planning (only one hash path
    to consider for a given pair of relations) as well as allow more effective
    hashing, when there are multiple hashable joinclauses.

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