51.51. 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 51.51.
pg_statistic_ext_data
Columns
|
Column Type Description |
|---|
|
Extended statistic 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
|