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Historical version. PostgreSQL 7.3 has reached end of support. See the current manual.

3.6. pg_attrdef

This catalog stores column default values. The main information about columns is stored in pg_attribute (see below). Only columns that explicitly specify a default value (when the table is created or the column is added) will have an entry here.

Table 3-6. pg_attrdef Columns

Name	Type	References	Description
adrelid	`oid`	pg_class.oid	The table this column belongs to
adnum	`int2`	pg_attribute.attnum	The number of the column
adbin	`text`		An internal representation of the column default value
adsrc	`text`		A human-readable representation of the default value

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