51.52. 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 51.52.
pg_statistic_ext_data
Columns
Name  Type  References  Description 

stxoid

oid


Extended statistic object containing the definition for this data 
stxdndistinct

pg_ndistinct

Ndistinct counts, serialized as
pg_ndistinct
type


stxddependencies

pg_dependencies

Functional dependency statistics, serialized
as
pg_dependencies
type


stxdmcv

pg_mcv_list

MCV (mostcommon values) list statistics, serialized as
pg_mcv_list
type
