pg_partitioned_table
The catalog pg_partitioned_table
stores
information about how tables are partitioned.
Table 51.36. 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; l = list partitioned table,
r = range partitioned table
| |
partnatts | int2 | The number of columns in partition key | |
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.
|