From efab707fbc3fb72dfe2caae54323ea6288054b08 Mon Sep 17 00:00:00 2001
From: Kozlov Ivan <i.kozlov@sape.ru>
Date: Tue, 5 Feb 2019 17:55:30 +0300
Subject: [PATCH] query for reproduce bug

---
 .../bugs/leak_when_memory_limit_exceeded.sql  | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 dbms/tests/queries/bugs/leak_when_memory_limit_exceeded.sql

diff --git a/dbms/tests/queries/bugs/leak_when_memory_limit_exceeded.sql b/dbms/tests/queries/bugs/leak_when_memory_limit_exceeded.sql
new file mode 100644
index 00000000000..68811ad061e
--- /dev/null
+++ b/dbms/tests/queries/bugs/leak_when_memory_limit_exceeded.sql
@@ -0,0 +1,22 @@
+--  max_memory_usage = 10000000000 (10 GB default)
+--  Intel® Xeon® E5-1650 v3 Hexadcore 128 GB DDR4 ECC
+--  Estimated time: ~ 250 seconds
+--  Read rows:      ~ 272 000 000
+SELECT
+  key,
+  uniqState(uuid_1) uuid_1_st,
+  uniqState(uuid_2) uuid_2_st,
+  uniqState(uuid_3) uuid_3_st
+FROM (
+  SELECT
+    rand64() value,
+    toString(value) value_str,
+    UUIDNumToString(toFixedString(substring(value_str, 1, 16), 16)) uuid_1, -- Any UUID
+    UUIDNumToString(toFixedString(substring(value_str, 2, 16), 16)) uuid_2, -- More memory
+    UUIDNumToString(toFixedString(substring(value_str, 3, 16), 16)) uuid_3, -- And more memory
+    modulo(value, 5000000) key -- Cardinality in my case
+  FROM numbers(550000000)
+)
+GROUP BY
+  key
+LIMIT 100;