PostgreSQL : Documentation: 13: 36.56. user_defined

36.56. `user_defined_types`
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36.56. `user_defined_types`

The view user_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 in PostgreSQL) and distinct types (not implemented in PostgreSQL). To be future-proof, use the column user_defined_type_category to differentiate between these. Other user-defined types such as base types and enums, which are PostgreSQL extensions, are not shown here. For domains, see Section 36.23 instead.

Table 36.54. user_defined_types Columns

Column Type Description
`user_defined_type_catalog` `sql_identifier` Name of the database that contains the type (always the current database)
`user_defined_type_schema` `sql_identifier` Name of the schema that contains the type
`user_defined_type_name` `sql_identifier` Name of the type
`user_defined_type_category` `character_data` Currently always `STRUCTURED`
`is_instantiable` `yes_or_no` Applies to a feature not available in PostgreSQL
`is_final` `yes_or_no` Applies to a feature not available in PostgreSQL
`ordering_form` `character_data` Applies to a feature not available in PostgreSQL
`ordering_category` `character_data` Applies to a feature not available in PostgreSQL
`ordering_routine_catalog` `sql_identifier` Applies to a feature not available in PostgreSQL
`ordering_routine_schema` `sql_identifier` Applies to a feature not available in PostgreSQL
`ordering_routine_name` `sql_identifier` Applies to a feature not available in PostgreSQL
`reference_type` `character_data` Applies to a feature not available in PostgreSQL
`data_type` `character_data` Applies to a feature not available in PostgreSQL
`character_maximum_length` `cardinal_number` Applies to a feature not available in PostgreSQL
`character_octet_length` `cardinal_number` Applies to a feature not available in PostgreSQL
`character_set_catalog` `sql_identifier` Applies to a feature not available in PostgreSQL
`character_set_schema` `sql_identifier` Applies to a feature not available in PostgreSQL
`character_set_name` `sql_identifier` Applies to a feature not available in PostgreSQL
`collation_catalog` `sql_identifier` Applies to a feature not available in PostgreSQL
`collation_schema` `sql_identifier` Applies to a feature not available in PostgreSQL
`collation_name` `sql_identifier` Applies to a feature not available in PostgreSQL
`numeric_precision` `cardinal_number` Applies to a feature not available in PostgreSQL
`numeric_precision_radix` `cardinal_number` Applies to a feature not available in PostgreSQL
`numeric_scale` `cardinal_number` Applies to a feature not available in PostgreSQL
`datetime_precision` `cardinal_number` Applies to a feature not available in PostgreSQL
`interval_type` `character_data` Applies to a feature not available in PostgreSQL
`interval_precision` `cardinal_number` Applies to a feature not available in PostgreSQL
`source_dtd_identifier` `sql_identifier` Applies to a feature not available in PostgreSQL
`ref_dtd_identifier` `sql_identifier` Applies to a feature not available in PostgreSQL

Column Type

Description

user_defined_type_catalog sql_identifier

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

user_defined_type_schema sql_identifier

Name of the schema that contains the type

user_defined_type_name sql_identifier

Name of the type

user_defined_type_category character_data

Currently always STRUCTURED

is_instantiable yes_or_no