postgresql/contrib/file_fdw
Simon Riggs 2686ee1b7c Collect and use multi-column dependency stats
Follow on patch in the multi-variate statistics patch series.

CREATE STATISTICS s1 WITH (dependencies) ON (a, b) FROM t;
ANALYZE;
will collect dependency stats on (a, b) and then use the measured
dependency in subsequent query planning.

Commit 7b504eb282 added
CREATE STATISTICS with n-distinct coefficients. These are now
specified using the mutually exclusive option WITH (ndistinct).

Author: Tomas Vondra, David Rowley
Reviewed-by: Kyotaro HORIGUCHI, Álvaro Herrera, Dean Rasheed, Robert Haas
and many other comments and contributions
Discussion: https://postgr.es/m/56f40b20-c464-fad2-ff39-06b668fac47c@2ndquadrant.com
2017-04-05 18:00:42 -04:00
..
data
expected
input Establish conventions about global object names used in regression tests. 2016-07-17 18:42:43 -04:00
output Allow contrib/file_fdw to read from a program, like COPY FROM PROGRAM. 2016-09-29 13:32:34 -04:00
sql
.gitignore
file_fdw--1.0.sql
file_fdw.c Collect and use multi-column dependency stats 2017-04-05 18:00:42 -04:00
file_fdw.control
Makefile Add file version information to most installed Windows binaries. 2014-07-14 14:07:52 -04:00