50.53. 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 50.53. 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 |