GS_DATABASE_LINK

GS_DATABASE_LINK stores database link information, mainly recording detailed information about database links. Only sysadmin can read this system catalog.

**Table 1** GS_DATABASE_LINK columns
Name	Type	Description
oid	oid	Unique ID of the current database link object (hidden attribute, which must be specified).
dlname	name	Name of the current database link.
dlowner	oid	ID of the owner of the current database link. If the owner is public, the value is 0.
dlfdw	oid	OID of the foreign-data wrapper of the current database link.
dlcreater	oid	ID of the creator of the current database link.
options	text[]	Current database link connection information in the format of "keyword=value".
useroptions	text[]	User information used by the current database link to connect to the remote end, in the format of "keyword=value".
dlacl	aclitem[]	Current database link access permission.