Help Center/ GaussDB(DWS)/ Developer Guide/ Standard data warehouse (9.1.0.x)/ GaussDB(DWS) System Catalogs and Views/ System Catalogs/ PG_ATTRDEF

Updated on 2024-09-02 GMT+08:00

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PG_ATTRDEF

PG_ATTRDEF stores default values of columns.

**Table 1** PG_ATTRDEF columns
Name	Type	Description
adrelid	oid	Table to which the column belongs
adnum	smallint	Column No.
adbin	pg_node_tree	Internal representation of the column's default value
adsrc	text	Internal representation of the human-readable default value
adbin_on_update	pg_node_tree	Internal representation of the value of on_update_expr
adsrc_on_update	text	Internal representation of the human-readable value of on_update_expr

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