PostgreSQL

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 “[.quote]#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