PostgreSQL

partrelid

oid

pg_class.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

pg_attribute.attnum

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

pg_opclass.oid

For each column in the partition key, this contains the OID of the operator class to use. See pg_opclass for details.

partcollation

oidvector

pg_opclass.oid

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.