| specific_catalog | sql_identifier | Name of the database containing the function (always the current database) |
| specific_schema | sql_identifier | Name of the schema containing the function |
| specific_name | sql_identifier | The "specific name" of the function. This is a
name that uniquely identifies the function in the schema, even
if the real name of the function is overloaded. The format of
the specific name is not defined, it should only be used to
compare it to other instances of specific routine names.
|
| routine_catalog | sql_identifier | Name of the database containing the function (always the current database) |
| routine_schema | sql_identifier | Name of the schema containing the function |
| routine_name | sql_identifier | Name of the function (may be duplicated in case of overloading) |
| routine_type | character_data | Always FUNCTION (In the future there might
be other types of routines.)
|
| module_catalog | sql_identifier | Applies to a feature not available in PostgreSQL |
| module_schema | sql_identifier | Applies to a feature not available in PostgreSQL |
| module_name | sql_identifier | Applies to a feature not available in PostgreSQL |
| udt_catalog | sql_identifier | Applies to a feature not available in PostgreSQL |
| udt_schema | sql_identifier | Applies to a feature not available in PostgreSQL |
| udt_name | sql_identifier | Applies to a feature not available in PostgreSQL |
| data_type | character_data | Return data type of the function, if it is a built-in type, or
ARRAY if it is some array (in that case, see
the view element_types), else
USER-DEFINED (in that case, the type is
identified in type_udt_name and associated
columns).
|
| character_maximum_length | cardinal_number | Always null, since this information is not applied to return data types in PostgreSQL |
| character_octet_length | cardinal_number | Always null, since this information is not applied to return data types 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 | Always null, since this information is not applied to return data types in PostgreSQL |
| numeric_precision_radix | cardinal_number | Always null, since this information is not applied to return data types in PostgreSQL |
| numeric_scale | cardinal_number | Always null, since this information is not applied to return data types in PostgreSQL |
| datetime_precision | cardinal_number | Always null, since this information is not applied to return data types in PostgreSQL |
| interval_type | character_data | Always null, since this information is not applied to return data types in PostgreSQL |
| interval_precision | character_data | Always null, since this information is not applied to return data types in PostgreSQL |
| type_udt_catalog | sql_identifier | Name of the database that the return data type of the function
is defined in (always the current database)
|
| type_udt_schema | sql_identifier | Name of the schema that the return data type of the function is
defined in
|
| type_udt_name | sql_identifier | Name of the return data type of the function
|
| scope_catalog | sql_identifier | Applies to a feature not available in PostgreSQL |
| scope_schema | sql_identifier | Applies to a feature not available in PostgreSQL |
| scope_name | sql_identifier | Applies to a feature not available in PostgreSQL |
| maximum_cardinality | cardinal_number | Always null, because arrays always have unlimited maximum cardinality in PostgreSQL |
| dtd_identifier | sql_identifier | An identifier of the data type descriptor of the return data
type of this function, unique among the data type descriptors
pertaining to the function. This is mainly useful for joining
with other instances of such identifiers. (The specific format
of the identifier is not defined and not guaranteed to remain
the same in future versions.)
|
| routine_body | character_data | If the function is an SQL function, then
SQL, else EXTERNAL.
|
| routine_definition | character_data | The source text of the function (null if the current user is
not the owner of the function). (According to the SQL
standard, this column is only applicable if
routine_body is SQL, but
in PostgreSQL it will contain
whatever source text was specified when the function was
created.)
|
| external_name | character_data | If this function is a C function, then the external name (link
symbol) of the function; else null. (This works out to be the
same value that is shown in
routine_definition.)
|
| external_language | character_data | The language the function is written in |
| parameter_style | character_data | Always GENERAL (The SQL standard defines
other parameter styles, which are not available in PostgreSQL.)
|
| is_deterministic | character_data | If the function is declared immutable (called deterministic in
the SQL standard), then YES, else
NO. (You cannot query the other volatility
levels available in PostgreSQL through the information schema.)
|
| sql_data_access | character_data | Always MODIFIES, meaning that the function
possibly modifies SQL data. This information is not useful for
PostgreSQL.
|
| is_null_call | character_data | If the function automatically returns null if any of its
arguments are null, then YES, else
NO.
|
| sql_path | character_data | Applies to a feature not available in PostgreSQL |
| schema_level_routine | character_data | Always YES (The opposite would be a method
of a user-defined type, which is a feature not available in
PostgreSQL.)
|
| max_dynamic_result_sets | cardinal_number | Applies to a feature not available in PostgreSQL |
| is_user_defined_cast | character_data | Applies to a feature not available in PostgreSQL |
| is_implicitly_invocable | character_data | Applies to a feature not available in PostgreSQL |
| security_type | character_data | If the function runs with the privileges of the current user,
then INVOKER, if the function runs with the
privileges of the user who defined it, then
DEFINER.
|
| to_sql_specific_catalog | sql_identifier | Applies to a feature not available in PostgreSQL |
| to_sql_specific_schema | sql_identifier | Applies to a feature not available in PostgreSQL |
| to_sql_specific_name | sql_identifier | Applies to a feature not available in PostgreSQL |
| as_locator | character_data | Applies to a feature not available in PostgreSQL |