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34.40. routines

The view routines contains all functions in the current database. Only those functions are shown that the current user has access to (by way of being the owner or having some privilege).

Table 34-38. routines Columns

Name Data Type Description
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 (might 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 Always null, since this information is not applied to return data types in PostgreSQL
collation_schema sql_identifier Always null, since this information is not applied to return data types in PostgreSQL
collation_name sql_identifier Always null, since this information is not applied to return data types 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 cardinal_number 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 function is not owned by a currently enabled role). (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 yes_or_no 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 yes_or_no 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 yes_or_no 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 yes_or_no Applies to a feature not available in PostgreSQL
is_implicitly_invocable yes_or_no 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 yes_or_no Applies to a feature not available in PostgreSQL
created time_stamp Applies to a feature not available in PostgreSQL
last_altered time_stamp Applies to a feature not available in PostgreSQL
new_savepoint_level yes_or_no Applies to a feature not available in PostgreSQL
is_udt_dependent yes_or_no Currently always NO. The alternative YES applies to a feature not available in PostgreSQL.
result_cast_from_data_type character_data Applies to a feature not available in PostgreSQL
result_cast_as_locator yes_or_no Applies to a feature not available in PostgreSQL
result_cast_char_max_length cardinal_number Applies to a feature not available in PostgreSQL
result_cast_char_octet_length character_data Applies to a feature not available in PostgreSQL
result_cast_char_set_catalog sql_identifier Applies to a feature not available in PostgreSQL
result_cast_char_set_schema sql_identifier Applies to a feature not available in PostgreSQL
result_cast_char_set_name sql_identifier Applies to a feature not available in PostgreSQL
result_cast_collation_catalog sql_identifier Applies to a feature not available in PostgreSQL
result_cast_collation_schema sql_identifier Applies to a feature not available in PostgreSQL
result_cast_collation_name sql_identifier Applies to a feature not available in PostgreSQL
result_cast_numeric_precision cardinal_number Applies to a feature not available in PostgreSQL
result_cast_numeric_precision_radix cardinal_number Applies to a feature not available in PostgreSQL
result_cast_numeric_scale cardinal_number Applies to a feature not available in PostgreSQL
result_cast_datetime_precision character_data Applies to a feature not available in PostgreSQL
result_cast_interval_type character_data Applies to a feature not available in PostgreSQL
result_cast_interval_precision cardinal_number Applies to a feature not available in PostgreSQL
result_cast_type_udt_catalog sql_identifier Applies to a feature not available in PostgreSQL
result_cast_type_udt_schema sql_identifier Applies to a feature not available in PostgreSQL
result_cast_type_udt_name sql_identifier Applies to a feature not available in PostgreSQL
result_cast_scope_catalog sql_identifier Applies to a feature not available in PostgreSQL
result_cast_scope_schema sql_identifier Applies to a feature not available in PostgreSQL
result_cast_scope_name sql_identifier Applies to a feature not available in PostgreSQL
result_cast_maximum_cardinality cardinal_number Applies to a feature not available in PostgreSQL
result_cast_dtd_identifier sql_identifier Applies to a feature not available in PostgreSQL
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