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 tables the current user owns.
  
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
        |