Horton

Teach planner how to estimate rows for timestamp generate_series

David Rowley <drowley@postgresql.org>

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Commit: 036bdcec9f9998a6e50711fadce69e482ff18f55
Author: David Rowley <drowley@postgresql.org>
Date: 2024-07-08T21:54:59Z
Releases: 18.0 
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

Files

PathChange+/−
src/backend/utils/adt/timestamp.c modified +88 −0
src/include/catalog/pg_proc.dat modified +9 −3
src/test/regress/expected/misc_functions.out modified +110 −0
src/test/regress/sql/misc_functions.sql modified +84 −0

Discussion