November 21, 2024: PostgreSQL 17.2, 16.6, 15.10, 14.15, 13.18, and 12.22 Released!
Supported Versions: Current (17) / 16 / 15 / 14 / 13
Development Versions: devel
Unsupported versions: 12 / 11 / 10 / 9.6 / 9.5 / 9.4 / 9.3 / 9.2 / 9.1 / 9.0 / 8.4 / 8.3 / 8.2 / 8.1 / 8.0 / 7.4 / 7.3 / 7.2 / 7.1
This documentation is for an unsupported version of PostgreSQL.
You may want to view the same page for the current version, or one of the other supported versions listed above instead.
51.6. pg_attrdef
Prev  Up Chapter 51. System Catalogs Home  Next

51.6. pg_attrdef

The catalog pg_attrdef stores column default values. The main information about columns is stored in pg_attribute. Only columns for which a default value has been explicitly set will have an entry here.

Table 51.6. pg_attrdef Columns

Name Type References Description
oid oid   Row identifier
adrelid oid pg_class.oid The table this column belongs to
adnum int2 pg_attribute.attnum The number of the column
adbin pg_node_tree   The column default value, in nodeToString() representation. Use pg_get_expr(adbin, adrelid) to convert it to an SQL expression.

Prev  Up  Next
51.5. pg_amproc  Home  51.7. pg_attribute