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38.60. `user_defined_types`
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38.60. `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 Postgres Pro) and distinct types (not implemented in Postgres Pro). 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 Postgres Pro extensions, are not shown here. For domains, see Section 38.23 instead.

Table 38.58. 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 Postgres Pro
`is_final` `yes_or_no` Applies to a feature not available in Postgres Pro
`ordering_form` `character_data` Applies to a feature not available in Postgres Pro
`ordering_category` `character_data` Applies to a feature not available in Postgres Pro
`ordering_routine_catalog` `sql_identifier` Applies to a feature not available in Postgres Pro
`ordering_routine_schema` `sql_identifier` Applies to a feature not available in Postgres Pro
`ordering_routine_name` `sql_identifier` Applies to a feature not available in Postgres Pro
`reference_type` `character_data` Applies to a feature not available in Postgres Pro
`data_type` `character_data` Applies to a feature not available in Postgres Pro
`character_maximum_length` `cardinal_number` Applies to a feature not available in Postgres Pro
`character_octet_length` `cardinal_number` Applies to a feature not available in Postgres Pro
`character_set_catalog` `sql_identifier` Applies to a feature not available in Postgres Pro
`character_set_schema` `sql_identifier` Applies to a feature not available in Postgres Pro
`character_set_name` `sql_identifier` Applies to a feature not available in Postgres Pro
`collation_catalog` `sql_identifier` Applies to a feature not available in Postgres Pro
`collation_schema` `sql_identifier` Applies to a feature not available in Postgres Pro
`collation_name` `sql_identifier` Applies to a feature not available in Postgres Pro
`numeric_precision` `cardinal_number` Applies to a feature not available in Postgres Pro
`numeric_precision_radix` `cardinal_number` Applies to a feature not available in Postgres Pro
`numeric_scale` `cardinal_number` Applies to a feature not available in Postgres Pro
`datetime_precision` `cardinal_number` Applies to a feature not available in Postgres Pro
`interval_type` `character_data` Applies to a feature not available in Postgres Pro
`interval_precision` `cardinal_number` Applies to a feature not available in Postgres Pro
`source_dtd_identifier` `sql_identifier` Applies to a feature not available in Postgres Pro
`ref_dtd_identifier` `sql_identifier` Applies to a feature not available in Postgres Pro

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