Query goal: | Find stable routines that contain INSERT, UPDATE, DELETE, SELECT … FOR UPDATE, or LOCK statement. The DBMS should get a correct background information about the behaviour of a routine. Stable routines cannot modify data in a database, lock tables, or its specific rows. |
Notes about the query: | Refers to the column pg_proc.prokind and thus works starting from PostgreSQL 11. In the returned body of routine the query replaces each newline character with the line break (br) tag for the better readability in case the query result is displayed in a web browser. There could be multiple routines with the same name but with different parameters in the same schema (overloading). Thus, for the unique identification of the routine it is necessary to present also its parameters in addition to the schema name and routine name. |
Query type: | Problem detection (Each row in the result could represent a flaw in the design) |
Query reliability: | High (Few or no false-positive results) |
Query license: | MIT License |
Fixing suggestion: | Define the routine as volatile. |
Data source: | INFORMATION_SCHEMA+system catalog |
SQL query: | Click on query to copy it
SELECT
pg_namespace.nspname AS routine_schema,
pg_proc.proname AS routine_name,
pg_get_function_identity_arguments(pg_proc.oid) AS parameters,
CASE WHEN pg_proc.prokind='f' THEN 'FUNCTION'
WHEN pg_proc.prokind='p' THEN 'PROCEDURE'
WHEN pg_proc.prokind='w' THEN 'WINDOW FUNCTION' END AS routine_type,
regexp_replace(pg_get_functiondef(pg_proc.oid),'[\r\n]','<br>','g') AS routine_src
FROM
pg_catalog.pg_proc,
pg_catalog.pg_namespace
WHERE
pg_proc.pronamespace = pg_namespace.oid
AND provolatile='s'
AND pg_proc.prokind<>'a'
AND pg_get_functiondef(pg_proc.oid)~*'((insert|update|delete|lock)[[:space:]]|select[[:space:]].*for[[:space:]]+update)'
AND pg_namespace.nspname NOT IN (SELECT schema_name
FROM INFORMATION_SCHEMA.schemata
WHERE schema_name<>'public' AND
schema_owner='postgres' AND schema_name IS NOT NULL)
ORDER BY routine_schema, routine_name, parameters; |