[2025-02-27] Building a dependency graph for materialized view(s) (PostgreSQL)

materialized-view-dependency-graph.sql

SELECT DISTINCT
  r.ev_class::regclass AS materialized_view,
  n.nspname AS schema_name,
  c.relname AS object_name,
  CASE c.relkind
    WHEN 'r' THEN 'Table'
    WHEN 'v' THEN 'View'
    WHEN 'm' THEN 'Materialized View'
    WHEN 'f' THEN 'Foreign Table'
    WHEN 'p' THEN 'Partitioned Table'
    ELSE '<Unknown>'
  END AS object_type
FROM
  pg_catalog.pg_depend AS d
  INNER JOIN pg_catalog.pg_rewrite AS r ON r.oid = d.objid
  INNER JOIN pg_catalog.pg_class AS c ON c.oid = d.refobjid
  INNER JOIN pg_catalog.pg_namespace AS n ON n.oid =c.relnamespace
WHERE
  r.ev_class IN (
    'foo'::regclass,
    'bar'::regclass,
    'baz'::regclass
    -- ...
  )
  AND d.refobjid <> r.ev_class
ORDER BY materialized_view, schema_name, object_name;