pg_partitioned_tableThe catalog pg_partitioned_table stores information about how tables are partitioned.
Table 52.36. pg_partitioned_table Columns
| Name | Type | References | Description |
|---|---|---|---|
partrelid |
oid |
|
The OID of the pg_class entry for this partitioned table |
partstrat |
char |
Partitioning strategy; h = hash partitioned table, l = list partitioned table, r = range partitioned table |
|
partnatts |
int2 |
The number of columns in partition key | |
partdefid |
oid |
|
The OID of the pg_class entry for the default partition of this partitioned table, or zero if this partitioned table does not have a default partition. |
partattrs |
int2vector |
|
This is an array of partnatts values that indicate which table columns are part of the partition key. For example, a value of 1 3 would mean that the first and the third table columns make up the partition key. A zero in this array indicates that the corresponding partition key column is an expression, rather than a simple column reference. |
partclass |
oidvector |
|
For each column in the partition key, this contains the OID of the operator class to use. See pg_opclass for details. |
partcollation |
oidvector |
|
For each column in the partition key, this contains the OID of the collation to use for partitioning, or zero if the column is not of a collatable data type. |
partexprs |
pg_node_tree |
Expression trees (in nodeToString() representation) for partition key columns that are not simple column references. This is a list with one element for each zero entry in partattrs. Null if all partition key columns are simple references. |