PostgreSQL: Documentation: 13: 36.41. routines

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36.41. `routines`
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36.41. `routines`

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

Table 36.39. routines Columns

Column 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` `FUNCTION` for a function, `PROCEDURE` for a procedure
`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). Null for a procedure.
`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). Null for a procedure.
`type_udt_schema` `sql_identifier` Name of the schema that the return data type of the function is defined in. Null for a procedure.
`type_udt_name` `sql_identifier` Name of the return data type of the function. Null for a procedure.
`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`. Null for a procedure.
`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` `cardinal_number` 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` `cardinal_number` 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

Column 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

FUNCTION for a function, PROCEDURE for a procedure

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). Null for a procedure.

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). Null for a procedure.

type_udt_schema sql_identifier

Name of the schema that the return data type of the function is defined in. Null for a procedure.

type_udt_name sql_identifier

Name of the return data type of the function. Null for a procedure.

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. Null for a procedure.

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 cardinal_number

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 cardinal_number

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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