WITH tables_in_inheritance_hierarchy AS (SELECT pn.nspname AS parent_schema, p.oid AS parent_oid, p.relname AS parent_table, pi.inhrelid AS child_oid
FROM pg_inherits pi INNER JOIN pg_class p ON pi.inhparent=p.oid
INNER JOIN pg_namespace pn ON p.relnamespace=pn.oid
INNER JOIN pg_authid AS ap ON pn.nspowner=ap.oid
WHERE (pn.nspname='public' OR ap.rolname<>'postgres'))
SELECT parent_schema, parent_table, Count(*) AS number_of_direct_children
FROM tables_in_inheritance_hierarchy AS tih
WHERE NOT EXISTS (SELECT 1
FROM tables_in_inheritance_hierarchy AS tih_check
WHERE tih.parent_oid=tih_check.child_oid)
GROUP BY parent_schema, parent_table
ORDER BY Count(*) DESC, parent_schema, parent_table;
Collections
This query belongs to the following collections:
Name
Description
Find problems about base tables
A selection of queries that return information about the data types, field sizes, default values as well as general structure of base tables. Contains all the types of queries - problem detection, software measure, and general overview
Find problems by overview
Queries that results point to different aspects of database that might have problems. A human reviewer has to decide based on the results as to whether there are problems or not .
Find quick numeric overview of the database
Queries that return numeric values showing mostly the number of different types of database objects in the database
Categories
This query is classified under the following categories:
Name
Description
Table inheritance
Queries of this category provide information about the inheritance between base tables.