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The pg_partition_columns system view is used to show the partition key columns of a partitioned table.
Table 1. pg_catalog.pg_partition_columns
| column | type | references | description |
|---|---|---|---|
schemaname | name | The name of the schema the partitioned table is in. | |
tablename | name | The table name of the top-level parent table. | |
columnname | name | The name of the partition key column. | |
partitionlevel | smallint | The level of this subpartition in the hierarchy. | |
position_in_partition_key | integer | For list partitions you can have a composite (multi-column) partition key. This shows the position of the column in a composite key. |
