make random_smallint function work in postgresql 16

2024-12-22 19:01:32 +00:00 · 2024-12-19 13:30:05 -07:00 · 2024-12-19 13:30:05 -07:00 · cd1b202612
commit cd1b202612
parent fbbf088932
1 changed files with 4 additions and 2 deletions
--- a/migrations/2024-12-18-200602_optimize_get_random_community/up.sql
+++ b/migrations/2024-12-18-200602_optimize_get_random_community/up.sql
@ -5,8 +5,10 @@
 CREATE FUNCTION random_smallint ()
    RETURNS smallint
    LANGUAGE sql
-    VOLATILE PARALLEL RESTRICTED RETURN random (
-        -32768, 32767
+    VOLATILE PARALLEL RESTRICTED RETURN
+    -- https://stackoverflow.com/questions/1400505/generate-a-random-number-in-the-range-1-10/1400752#1400752
+    -- (`+ 1` makes the upper bound inclusive)
+    trunc ((random() * (32768 + 32767 + 1)) - 32768
 );

 ALTER TABLE community