holds extended planner statistics.
Each row in this catalog corresponds to a statistics object
created with CREATE STATISTICS.
|Table containing the columns described by this object|
|Name of the statistics object|
|The OID of the namespace that contains this statistics object|
|Owner of the statistics object|
| An array of attribute numbers, indicating which table columns are
covered by this statistics object;
for example a value of |
| An array containing codes for the enabled statistic kinds;
valid values are:
| N-distinct counts, serialized as |
| Functional dependency statistics, serialized
stxkind field is filled at creation of the
statistics object, indicating which statistic type(s) are desired.
The fields after it are initially NULL and are filled only when the
corresponding statistic has been computed by