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| title: pg_partition_rule |
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| The `pg_partition_rule` system catalog table is used to track partitioned tables, their check constraints, and data containment rules. Each row of `pg_partition_rule` represents either a leaf partition (the bottom level partitions that contain data), or a branch partition (a top or mid-level partition that is used to define the partition hierarchy, but does not contain any data). |
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| <a id="topic1__hc179425"></a> |
| <span class="tablecap">Table 1. pg\_catalog.pg\_partition\_rule</span> |
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| | column | type | references | description | |
| |---------------------|----------|----------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| |
| | `paroid` | oid | pg\_partition.oid | Row identifier of the partitioning level (from [pg\_partition](pg_partition.html#topic1)) to which this partition belongs. In the case of a branch partition, the corresponding table (identified by `pg_partition_rule`) is an empty container table. In case of a leaf partition, the table contains the rows for that partition containment rule. | |
| | `parchildrelid` | oid | pg\_class.oid | The table identifier of the partition (child table). | |
| | `parparentrule` | oid | pg\_partition\_rule.paroid | The row identifier of the rule associated with the parent table of this partition. | |
| | `parname` | name | | The given name of this partition. | |
| | `parisdefault` | boolean | | Whether or not this partition is a default partition. | |
| | `parruleord` | smallint | | For range partitioned tables, the rank of this partition on this level of the partition hierarchy. | |
| | `parrangestartincl` | boolean | | For range partitioned tables, whether or not the starting value is inclusive. | |
| | `parrangeendincl` | boolean | | For range partitioned tables, whether or not the ending value is inclusive. | |
| | `parrangestart` | text | | For range partitioned tables, the starting value of the range. | |
| | `parrangeend` | text | | For range partitioned tables, the ending value of the range. | |
| | `parrangeevery` | text | | For range partitioned tables, the interval value of the `EVERY` clause. | |
| | `parlistvalues` | text | | For list partitioned tables, the list of values assigned to this partition. | |
| | `parreloptions` | text | | An array describing the storage characteristics of the particular partition. | |
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