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
.
Table 51.52.
pg_statistic_ext_data
Columns
| Name | Type | References | Description |
|---|---|---|---|
stxoid
|
oid
|
|
Extended statistic 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.
|