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35.60. `user_defined_types`
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35.60. `user_defined_types`#

The viewuser_defined_types currently contains all composite types defined in the current database. Only those types are shown that the current user has access to (by way of being the owner or having some privilege).

SQL knows about two kinds of user-defined types: structured types (also known as composite types inPostgreSQL) and distinct types (not implemented inPostgreSQL). To be future-proof, use the columnuser_defined_type_category to differentiate between these. Other user-defined types such as base types and enums, which arePostgreSQL extensions, are not shown here. For domains, seeSection 35.23 instead.

Table 35.58. user_defined_types Columns

Column Type Description
`user_defined_type_catalogsql_identifier` Name of the database that contains the type (always the current database)
`user_defined_type_schemasql_identifier` Name of the schema that contains the type
`user_defined_type_namesql_identifier` Name of the type
`user_defined_type_categorycharacter_data` Currently always`STRUCTURED`
`is_instantiableyes_or_no` Applies to a feature not available inPostgreSQL
`is_finalyes_or_no` Applies to a feature not available inPostgreSQL
`ordering_formcharacter_data` Applies to a feature not available inPostgreSQL
`ordering_categorycharacter_data` Applies to a feature not available inPostgreSQL
`ordering_routine_catalogsql_identifier` Applies to a feature not available inPostgreSQL
`ordering_routine_schemasql_identifier` Applies to a feature not available inPostgreSQL
`ordering_routine_namesql_identifier` Applies to a feature not available inPostgreSQL
`reference_typecharacter_data` Applies to a feature not available inPostgreSQL
`data_typecharacter_data` Applies to a feature not available inPostgreSQL
`character_maximum_lengthcardinal_number` Applies to a feature not available inPostgreSQL
`character_octet_lengthcardinal_number` Applies to a feature not available inPostgreSQL
`character_set_catalogsql_identifier` Applies to a feature not available inPostgreSQL
`character_set_schemasql_identifier` Applies to a feature not available inPostgreSQL
`character_set_namesql_identifier` Applies to a feature not available inPostgreSQL
`collation_catalogsql_identifier` Applies to a feature not available inPostgreSQL
`collation_schemasql_identifier` Applies to a feature not available inPostgreSQL
`collation_namesql_identifier` Applies to a feature not available inPostgreSQL
`numeric_precisioncardinal_number` Applies to a feature not available inPostgreSQL
`numeric_precision_radixcardinal_number` Applies to a feature not available inPostgreSQL
`numeric_scalecardinal_number` Applies to a feature not available inPostgreSQL
`datetime_precisioncardinal_number` Applies to a feature not available inPostgreSQL
`interval_typecharacter_data` Applies to a feature not available inPostgreSQL
`interval_precisioncardinal_number` Applies to a feature not available inPostgreSQL
`source_dtd_identifiersql_identifier` Applies to a feature not available inPostgreSQL
`ref_dtd_identifiersql_identifier` Applies to a feature not available inPostgreSQL

Column Type

Description

user_defined_type_catalogsql_identifier

Name of the database that contains the type (always the current database)

user_defined_type_schemasql_identifier

Name of the schema that contains the type

user_defined_type_namesql_identifier

Name of the type

user_defined_type_categorycharacter_data

Currently alwaysSTRUCTURED

is_instantiableyes_or_no