pg_statistic_ext_data
pg_statistic_ext_data#
The pg_statistic_ext_data system catalog table holds data for extended planner statistics defined in pg_statistic_ext. Each row in this catalog corresponds to a statistics object created with CREATE STATISTICS.
Like pg_statistic, pg_statistic_ext_data should not be readable by the public, since the contents might be considered sensitive. (Example: most common combinations of values in columns might be quite interesting.) pg_stats_ext is a publicly readable view on pg_statistic_ext_data (after joining with pg_statistic_ext) that only exposes information about those tables and columns that are readable by the current user.
column |
type |
references |
description |
|---|---|---|---|
|
oid |
pg_statistic_ext.oid |
The extended statistic object containing the definition for this data. |
|
pg_ndistinct |
N-distinct counts, serialized as |
|
|
pg_dependencies |
Functional dependency statistics, serialized as |
|
|
pg_mcv_list |
MCV (most-common values) list statistics, serialized as |
Parent topic: System Catalogs Definitions