52.37. pg_partitioned_table #

   The catalog pg_partitioned_table stores information about how tables
   are partitioned.

   Table 52.37. pg_partitioned_table Columns

   Column Type

   Description

   partrelid oid (references pg_class.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 the partition key

   partdefid oid (references pg_class.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 (references 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 (references 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 (references pg_collation.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.