37.42. routine_routine_usage

37.42. routine_routine_usage

The view routine_routine_usage identifies all functions or procedures that are used by another (or the same) function or procedure, either in the SQL body or in parameter default expressions. (This only works for unquoted SQL bodies, not quoted bodies or functions in other languages.) An entry is included here only if the used function is owned by a currently enabled role. (There is no such restriction on the using function.)

Note that the entries for both functions in the view refer to the “specific” name of the routine, even though the column names are used in a way that is inconsistent with other information schema views about routines. This is per SQL standard, although it is arguably a misdesign. See Section 37.45 for more information about specific names.

Table 37.40. routine_routine_usage Columns

Column Type Description
specific_catalog sql_identifier Name of the database containing the using function (always the current database)
specific_schema sql_identifier Name of the schema containing the using function
specific_name sql_identifier The “specific name” of the using function.
routine_catalog sql_identifier Name of the database that contains the function that is used by the first function (always the current database)
routine_schema sql_identifier Name of the schema that contains the function that is used by the first function
routine_name sql_identifier The “specific name” of the function that is used by the first function.

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原文：PostgreSQL 15.19 Documentation（英文原文，待翻譯）