pg_partition
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pg_partition
The pg_partition system catalog table is used to track partitioned tables and their inheritance level relationships. Each row of pg_partition represents either the level of a partitioned table in the partition hierarchy, or a subpartition template description. The value of the attribute paristemplate determines what a particular row represents.
| column | type | references | description |
|---|---|---|---|
| parrelid | oid | pg_class.oid | The object identifier of the table. |
| parkind | char | The partition type - R for range or L for list. | |
| parlevel | smallint | The partition level of this row: 0 for the top-level parent table, 1 for the first level under the parent table, 2 for the second level, and so on. | |
| paristemplate | boolean | Whether or not this row represents a subpartition template definition (true) or an actual partitioning level (false). | |
| parnatts | smallint | The number of attributes that define this level. | |
| paratts | smallint() | An array of the attribute numbers (as in pg_attribute.attnum) of the attributes that participate in defining this level. | |
| parclass | oidvector | pg_opclass.oid | The operator class identifier(s) of the partition columns. |