Redshift Observatory

System Table Tracker

System view information_schema.table_constraints version 1.0.54899 / 2023-08-15

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SELECT 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,
       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(CASE
              WHEN c.contype = CAST('c' AS "char")
                THEN CAST('CHECK' AS text)
              WHEN c.contype = CAST('f' AS "char")
                THEN CAST('FOREIGN KEY' AS text)
              WHEN c.contype = CAST('p' AS "char")
                THEN CAST('PRIMARY KEY' AS text)
              WHEN c.contype = CAST('u' AS "char")
                THEN CAST('UNIQUE' AS text)
              ELSE CAST(NULL AS text)
            END AS information_schema.character_data) AS constraint_type,
       CAST(CASE
              WHEN c.condeferrable
                THEN CAST('YES' AS text)
              ELSE CAST('NO' AS text)
            END AS information_schema.character_data) AS is_deferrable,
       CAST(CASE
              WHEN c.condeferred
                THEN CAST('YES' AS text)
              ELSE CAST('NO' AS text)
            END AS information_schema.character_data) AS initially_deferred
FROM pg_namespace AS nc, pg_namespace AS nr, pg_constraint AS c, pg_class AS r, pg_user AS u
WHERE nc.oid = c.connamespace
  AND nr.oid = r.relnamespace
  AND c.conrelid = r.oid
  AND r.relowner = u.usesysid
  AND r.relkind = CAST('r' AS "char")
  AND u.usename = CAST("current_user"() AS name)

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