1 sql-dk --db "$postgresql_db" --sql "

     2 SELECT

     3 	table_schema,

     4 	table_name,

     5 	table_type

     6 FROM information_schema.tables

     7 WHERE table_schema IN ('pg_catalog', 'information_schema')

     8 LIMIT 3;

     9 

    10 SELECT

    11 	typName,

    12 	typCategory,

    13 	typByVal

    14 FROM pg_type

    15 LIMIT 4" \

    16 	--relation tables \

    17 	--relation types \

    18 	--formatter xml \

    19 	| relpipe-in-xml