52.51. 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 
Ndistinct counts, serialized as

Functional dependency statistics, serialized
as

MCV (mostcommon values) list statistics, serialized as

Perexpression statistics, serialized as an array of
