Module: PgHero::Methods::Constraints

Included in:
Database
Defined in:
lib/pghero/methods/constraints.rb

Instance Method Summary collapse

Instance Method Details

#invalid_constraints ⇒ Object

referenced fields can be nil as not all constraints are foreign keys



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# File 'lib/pghero/methods/constraints.rb', line 6

def invalid_constraints
  select_all <<~SQL
    SELECT
      nsp.nspname AS schema,
      rel.relname AS table,
      con.conname AS name,
      fnsp.nspname AS referenced_schema,
      frel.relname AS referenced_table
    FROM
      pg_catalog.pg_constraint con
    INNER JOIN
      pg_catalog.pg_class rel ON rel.oid = con.conrelid
    LEFT JOIN
      pg_catalog.pg_class frel ON frel.oid = con.confrelid
    LEFT JOIN
      pg_catalog.pg_namespace nsp ON nsp.oid = con.connamespace
    LEFT JOIN
      pg_catalog.pg_namespace fnsp ON fnsp.oid = frel.relnamespace
    WHERE
      con.convalidated = 'f'
  SQL
end