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Teach planner how to estimate rows for timestamp generate_series

author David Rowley <drowley@postgresql.org>

Mon, 8 Jul 2024 21:54:59 +0000 (09:54 +1200)

committer David Rowley <drowley@postgresql.org>

Mon, 8 Jul 2024 21:54:59 +0000 (09:54 +1200)

commit 036bdcec9f9998a6e50711fadce69e482ff18f55

tree 8c1083770d0c69096c0ce0bb3963333b74c75168 tree

parent 5193ca8e155ac0140d20361bdafa27744c016252 commit | diff

Teach planner how to estimate rows for timestamp generate_series

This provides the planner with row estimates for
generate_series(TIMESTAMP, TIMESTAMP, INTERVAL),
generate_series(TIMESTAMPTZ, TIMESTAMPTZ, INTERVAL) and
generate_series(TIMESTAMPTZ, TIMESTAMPTZ, INTERVAL, TEXT) when the input
parameter values can be estimated during planning.

Author: David Rowley
Reviewed-by: jian he <jian.universality@gmail.com>
Discussion: https://postgr.es/m/CAApHDvrBE%3D%2BASo_sGYmQJ3GvO8GPvX5yxXhRS%3Dt_ybd4odFkhQ%40mail.gmail.com

src/backend/utils/adt/timestamp.c diff | blob | blame | history

src/include/catalog/pg_proc.dat diff | blob | blame | history

src/test/regress/expected/misc_functions.out diff | blob | blame | history

src/test/regress/sql/misc_functions.sql diff | blob | blame | history

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