PostgreSQL

PostgreSQL Elephant Logo

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

pg_statistic_ext.oid

Extended statistic object containing the definition for this data

stxdndistinct

pg_ndistinct

N-distinct counts, serialized as pg_ndistinct type

stxddependencies

pg_dependencies

Functional dependency statistics, serialized as pg_dependencies type

stxdmcv

pg_mcv_list

MCV (most-common values) list statistics, serialized as pg_mcv_list type

+

Prev Up Next

51.51. pg_statistic_ext

Home

51.53. pg_subscription

Submit correction

If you see anything in the documentation that is not correct, does not match your experience with the particular feature or requires further clarification, please use this form to report a documentation issue.

Copyright © 1996-2023 The PostgreSQL Global Development Group