1 files changed, 40 insertions, 0 deletions
diff --git a/src/test/regress/expected/misc_functions.out b/src/test/regress/expected/misc_functions.out
index 130a0e4be3a..a1ee4dbb3b5 100644
--- a/src/test/regress/expected/misc_functions.out
+++ b/src/test/regress/expected/misc_functions.out
@@ -133,3 +133,43 @@ ERROR:  function num_nulls() does not exist
 LINE 1: SELECT num_nulls();
                ^
 HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
+--
+-- Test some built-in SRFs
+--
+-- The outputs of these are variable, so we can't just print their results
+-- directly, but we can at least verify that the code doesn't fail.
+--
+select setting as segsize
+from pg_settings where name = 'wal_segment_size'
+\gset
+select count(*) > 0 as ok from pg_ls_waldir();
+ ok 
+----
+ t
+(1 row)
+
+-- Test ProjectSet as well as FunctionScan
+select count(*) > 0 as ok from (select pg_ls_waldir()) ss;
+ ok 
+----
+ t
+(1 row)
+
+-- Test not-run-to-completion cases.
+select * from pg_ls_waldir() limit 0;
+ name | size | modification 
+------+------+--------------
+(0 rows)
+
+select count(*) > 0 as ok from (select * from pg_ls_waldir() limit 1) ss;
+ ok 
+----
+ t
+(1 row)
+
+select (pg_ls_waldir()).size = :segsize as ok limit 1;
+ ok 
+----
+ t
+(1 row)
+