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 | N-distinct counts, serialized as pg_ndistincttype | |
| stxddependencies | pg_dependencies | Functional dependency statistics, serialized
       as pg_dependenciestype | |
| stxdmcv | pg_mcv_list | MCV (most-common values) list statistics, serialized as pg_mcv_listtype |