pgsql: Add Cardinality typedef

From: Peter Eisentraut <peter(at)eisentraut(dot)org>
To: pgsql-committers(at)lists(dot)postgresql(dot)org
Subject: pgsql: Add Cardinality typedef
Date: 2021-09-15 17:21:02
Message-ID: E1mQYak-0004ux-B3@gemulon.postgresql.org
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Add Cardinality typedef

Similar to Cost and Selectivity, this is just a double, which can be
used in path and plan nodes to give some hint about the meaning of a
field.

Discussion: https://www.postgresql.org/message-id/c091e5cd-45f8-69ee-6a9b-de86912cc7e7@enterprisedb.com

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/6fe0eb963d3894ae9b0b6e151083887b664d45a3

Modified Files
--------------
src/include/nodes/nodes.h | 1 +
src/include/nodes/parsenodes.h | 2 +-
src/include/nodes/pathnodes.h | 46 +++++++++++++++++++++---------------------
src/include/nodes/plannodes.h | 4 ++--
4 files changed, 27 insertions(+), 26 deletions(-)

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