The view data_type_privileges identifies all data type descriptors that the current user has access to, by way of being the owner of the described object or having some privilege for it. A data type descriptor is generated whenever a data type is used in the definition of a table column, a domain, or a function (as parameter or return type) and stores some information about how the data type is used in that instance (for example, the declared maximum length, if applicable). Each data type descriptors is assigned an arbitrary identifier that is unique among the data type descriptor identifiers assigned for one object (table, domain, function). This view is probably not useful for applications, but it is used to define some other views in the information schema.
Table 32-10. domain_constraints Columns
Name
Data Type
Description
object_catalog
sql_identifier
Name of the database that contains the described object (always the current database)
object_schema
sql_identifier
Name of the schema that contains the described object
object_name
sql_identifier
Name of the described object
object_type
character_data
The type of the described object: one of TABLE (the data type descriptor pertains to a column of that table), DOMAIN (the data type descriptors pertains to that domain), ROUTINE (the data type descriptor pertains to a parameter or the return data type of that function).
dtd_identifier
sql_identifier
The identifier of the data type descriptor, which is unique among the data type descriptors for that same object.
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