pg_statistic_ext_data
The catalog pg_statistic_ext_data
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.
Table 52.51. pg_statistic_ext_data Columns
Column Type Description |
|---|
Extended statistics object containing the definition for this data |
N-distinct counts, serialized as |
Functional dependency statistics, serialized
as |
MCV (most-common values) list statistics, serialized as
|
Per-expression statistics, serialized as an array of
|