contrib/indexscan/sql/create_function.sql - cloudberry - Git at Google

 -- select * from readindex('pg_class_oid_index'::regclass) as (ictid tid, hctid tid, aotid text, istatus text, hstatus text, oid oid);

 -- We'll be using the function to read indexes on the segments, mark the
 -- function as EXECUTE ON ALL SEGMENTS.
 CREATE OR REPLACE FUNCTION readindex(oid) RETURNS SETOF record AS
 '$libdir/indexscan', 'readindex'
 LANGUAGE C STRICT VOLATILE EXECUTE ON ALL SEGMENTS;
	-- select * from readindex('pg_class_oid_index'::regclass) as (ictid tid, hctid tid, aotid text, istatus text, hstatus text, oid oid);

	-- We'll be using the function to read indexes on the segments, mark the
	-- function as EXECUTE ON ALL SEGMENTS.
	CREATE OR REPLACE FUNCTION readindex(oid) RETURNS SETOF record AS
	'$libdir/indexscan', 'readindex'
	LANGUAGE C STRICT VOLATILE EXECUTE ON ALL SEGMENTS;