pg_partitioned_table stores information about how tables are partitioned.
|The OID of the |
pg_class entry for this partitioned table
| ||Partitioning strategy; |
l = list partitioned table,
r = range partitioned table
| ||The number of columns in partition key|
|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.
|For each column in the partition key, this contains the OID of the operator class to use. See pg_opclass for details.|
|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.|
| ||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.