column default values. The main information about columns is stored
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.
||Row identifier (hidden attribute; must be explicitly selected)|
||The table this column belongs to|
||The number of the column|
||The internal representation of the column default value|
||A human-readable representation of the default value|
adsrc field is historical,
and is best not used, because it does not track outside changes
that might affect the representation of the default value.
pg_get_expr for example) is a
better way to display the default value.
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