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v5.0

Documentation:v5.0

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PG_ATTRDEF

PG_ATTRDEF records default values of columns.

Table 1 PG_ATTRDEF columns

Name Type Description
oid oid Row identifier (hidden attribute, which must be specified)
adrelid oid Table to which a column belongs
adnum smallint Number of columns
adbin pg_node_tree Internal representation of the default value of a column or of a generated expression
adsrc text Internal representation of a readable default value or of a generated expression
adgencol "char" Specifies whether a column is a generated column. The value s indicates that the column is a generated column, and the value '\0 indicates that the column is a common column. The default value is '\0.
adbin_on_update pg_node_tree Converts a storage expression into a character string.
adsrc_on_update text Specifies the name of a storage expression.
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