Building off of Kong Man's answer, the below CTE returns all the tables and views that interact with a given table/view. Tested in PostgreSQL 15.3.
Example usage, filtering for a specific schema and table at the end of the CTE:
SELECT *
FROM final
WHERE CAST(dependency_sort_chain as VARCHAR) like '%manual.dim_command%'
AND schema_and_object <> 'manual.dim_command'
ORDER BY schema_and_object;
Returns all the tables and views that reference it:
![enter image description here]()
-- Credit to Kong Man. Source: https://mcmap.net/q/269539/-find-dependent-objects-for-a-table-or-view
WITH RECURSIVE preference AS (
SELECT 10 AS max_depth
, 16384 AS min_oid -- user objects only
, '^(londiste|pgq|pg_toast)'::text AS schema_exclusion
, '^pg_(conversion|language|ts_(dict|template))'::text AS class_exclusion
, '{"SCHEMA":"00", "TABLE":"01", "TABLE CONSTRAINT":"02", "DEFAULT VALUE":"03",
"INDEX":"05", "SEQUENCE":"06", "TRIGGER":"07", "FUNCTION":"08",
"VIEW":"10", "MATERIALIZED VIEW":"11", "FOREIGN TABLE":"12"}'::json AS type_sort_orders
),
dependency_pair AS (
SELECT objid
, array_agg(objsubid ORDER BY objsubid) AS objsubids
, upper(obj.type) AS object_type
, coalesce(obj.schema, substring(obj.identity, E'(\\w+?)\\.'), '') AS object_schema
, obj.name AS object_name
, obj.identity AS object_identity
, refobjid
, array_agg(refobjsubid ORDER BY refobjsubid) AS refobjsubids
, upper(refobj.type) AS refobj_type
, coalesce(CASE WHEN refobj.type='schema' THEN refobj.identity
ELSE refobj.schema END
, substring(refobj.identity, E'(\\w+?)\\.'), '') AS refobj_schema
, refobj.name AS refobj_name
, refobj.identity AS refobj_identity
, CASE deptype
WHEN 'n' THEN 'normal'
WHEN 'a' THEN 'automatic'
WHEN 'i' THEN 'internal'
WHEN 'e' THEN 'extension'
WHEN 'p' THEN 'pinned'
END AS dependency_type
FROM pg_depend AS dep
, LATERAL pg_identify_object(classid, objid, 0) AS obj
, LATERAL pg_identify_object(refclassid, refobjid, 0) AS refobj
, preference
WHERE deptype = ANY('{n,a}')
AND objid >= preference.min_oid
AND (refobjid >= preference.min_oid OR refobjid = 2200) -- need public schema as root node
AND coalesce(obj.schema, substring(obj.identity, E'(\\w+?)\\.'), '') !~ preference.schema_exclusion
AND coalesce(CASE WHEN refobj.type='schema' THEN refobj.identity
ELSE refobj.schema END
, substring(refobj.identity, E'(\\w+?)\\.'), '') !~ preference.schema_exclusion
GROUP BY objid, obj.type, obj.schema, obj.name, obj.identity
, refobjid, refobj.type, refobj.schema, refobj.name, refobj.identity, deptype
),
dependency_hierarchy AS (
SELECT DISTINCT
0 AS level,
refobjid AS objid,
refobj_type AS object_type,
refobj_identity AS object_identity,
--refobjsubids AS objsubids,
NULL::text AS dependency_type,
ARRAY[refobjid] AS dependency_chain,
ARRAY[concat(preference.type_sort_orders->>refobj_type,refobj_type,':',refobj_identity)] AS dependency_sort_chain
FROM dependency_pair root
, preference
WHERE NOT EXISTS
(SELECT 'x' FROM dependency_pair branch WHERE branch.objid = root.refobjid)
AND refobj_schema !~ preference.schema_exclusion
UNION ALL
SELECT
level + 1 AS level,
child.objid,
child.object_type,
child.object_identity,
--child.objsubids,
child.dependency_type,
parent.dependency_chain || child.objid,
parent.dependency_sort_chain || concat(preference.type_sort_orders->>child.object_type,child.object_type,':',child.object_identity)
FROM dependency_pair child
JOIN dependency_hierarchy parent ON (parent.objid = child.refobjid)
, preference
WHERE level < preference.max_depth
AND child.object_schema !~ preference.schema_exclusion
AND child.refobj_schema !~ preference.schema_exclusion
AND NOT (child.objid = ANY(parent.dependency_chain)) -- prevent circular referencing
),
aliased_and_filtered as (
SELECT level
, objid as object_id
, object_type
, object_identity
, dependency_type
, dependency_chain
, dependency_sort_chain
FROM dependency_hierarchy
WHERE object_type IN ('TABLE CONSTRAINT','RULE')
),
text_search as (
SELECT level
, object_id
, object_type
, CASE WHEN object_identity like '% on %'
THEN SUBSTR(object_identity, position(' on ' in object_identity)+ 4)
END AS schema_and_object
, object_identity
, dependency_type
, dependency_chain
, dependency_sort_chain
FROM aliased_and_filtered
),
final as (
SELECT *
FROM text_search
)
SELECT *
FROM final
ORDER BY schema_and_object;
