pg_attrdef
The pg_attrdef table stores column default values. The main information about columns is stored in pg_attribute. Only columns that explicitly specify a default value (when the table is created or the column is added) will have an entry here.
| column | type | references | description |
|---|---|---|---|
oid | oid | The object ID | |
adrelid | oid | pg_class.oid | The table this column belongs to |
adnum | smallint | pg_attribute.attnum | The number of the column |
adbin | pg_node_tree | The internal representation of the column default value |
Parent topic: System Catalogs Definitions