How to properly use TRIM()?

Hi, ALL,

draft=# SELECT c.relname AS name, ixs.tablespace, ARRAY(SELECT
a.attname FROM pg_attribute a WHERE a.attrelid = idx.indrelid AND
a.attnum = ANY(idx.indkey) AND a.attnum > 0 ORDER BY
array_position(idx.indkey, a.attnum) OFFSET idx.indnkeyatts) AS
included, NULLIF( TRIM( c.reloptions ), '' ) AS storage FROM pg_index
idx, pg_class c, pg_namespace n, pg_class t, pg_indexes ixs WHERE
ixs.indexname = c.relname AND c.oid = idx.indexrelid AND t.oid =
idx.indrelid AND n.oid = c.relnamespace AND idx.indisprimary AND
n.nspname = 'public' AND t.relname = 'leagues';
ERROR: function pg_catalog.btrim(text[]) does not exist
LINE 1: ...num) OFFSET idx.indnkeyatts) AS included, NULLIF( TRIM( c.re...
^
HINT: No function matches the given name and argument types. You
might need to add explicit type casts.
draft=# SELECT c.relname AS name, ixs.tablespace, ARRAY(SELECT
a.attname FROM pg_attribute a WHERE a.attrelid = idx.indrelid AND
a.attnum = ANY(idx.indkey) AND a.attnum > 0 ORDER BY
array_position(idx.indkey, a.attnum) OFFSET idx.indnkeyatts) AS
included, NULLIF( TRIM( BOTH FROM c.reloptions ), '' ) AS storage FROM
pg_index idx, pg_class c, pg_namespace n, pg_class t, pg_indexes ixs
WHERE ixs.indexname = c.relname AND c.oid = idx.indexrelid AND t.oid =
idx.indrelid AND n.oid = c.relnamespace AND idx.indisprimary AND
n.nspname = 'public' AND t.relname = 'leagues';
ERROR: function pg_catalog.btrim(text[]) does not exist
LINE 1: ...num) OFFSET idx.indnkeyatts) AS included, NULLIF( TRIM( BOTH...
^
HINT: No function matches the given name and argument types. You
might need to add explicit type casts.
draft=#

Thank you.