feat: implement count_hash aggr function (#6342)

* feat: implement count_hash aggr function Signed-off-by: Ruihang Xia <waynestxia@gmail.com> * sqlness case Signed-off-by: Ruihang Xia <waynestxia@gmail.com> * change copyright year Signed-off-by: Ruihang Xia <waynestxia@gmail.com> * review changes Signed-off-by: Ruihang Xia <waynestxia@gmail.com> --------- Signed-off-by: Ruihang Xia <waynestxia@gmail.com>
2026-10-29 15:06:59 +00:00 · 2025-06-25 12:14:03 +00:00
parent cde7e11983
commit e728cb33fb
9 changed files with 752 additions and 1 deletions
@@ -0,0 +1,36 @@
+create table
+    t (
+        ts timestamp time index,
+        `id` int,
+        `name` string,
+        PRIMARY KEY (`id`),
+    );
+
+insert into
+    t (ts, `id`, `name`)
+values
+    (1, 1, 'a'),
+    (2, 2, 'b'),
+    (3, 3, 'c'),
+    (4, 4, 'd');
+
+select
+    count_hash (`id`)
+from
+    t;
+
+select
+    count_hash (`id`)
+from
+    t
+group by
+    `name`;
+
+select
+    count_hash (`id`, `name`)
+from
+    t
+group by
+    ts;
+
+drop table t;