Redshift Research Project

System Table Tracker

System view information_schema.constraint_table_usage version 1.0.38698 / 2022-05-27

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SELECT CAST(current_database() AS information_schema.sql_identifier) AS table_catalog,
       CAST(nr.nspname AS information_schema.sql_identifier) AS table_schema,
       CAST(r.relname AS information_schema.sql_identifier) AS table_name,
       CAST(current_database() AS information_schema.sql_identifier) AS constraint_catalog,
       CAST(nc.nspname AS information_schema.sql_identifier) AS constraint_schema,
       CAST(c.conname AS information_schema.sql_identifier) AS constraint_name
FROM pg_constraint AS c, pg_namespace AS nc, pg_class AS r, pg_namespace AS nr, pg_user AS u
WHERE c.connamespace = nc.oid
  AND r.relnamespace = nr.oid
  AND ((c.contype = CAST('f' AS "char")
    AND c.confrelid = r.oid)
    OR ((c.contype = CAST('p' AS "char")
      OR c.contype = CAST('u' AS "char"))
    AND c.conrelid = r.oid))
  AND r.relkind = CAST('r' AS "char")
  AND r.relowner = u.usesysid
  AND u.usename = CAST("current_user"() AS name)

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