From 28e0e64638b2487282bb0f5de85ee530dc1e55c0 Mon Sep 17 00:00:00 2001
From: Alexey Milovidov <milovidov@yandex-team.ru>
Date: Sun, 11 Aug 2019 23:04:14 +0300
Subject: [PATCH] Added a test

---
 .../00989_parallel_parts_loading.reference    |  2 ++
 .../00989_parallel_parts_loading.sql          | 19 +++++++++++++++++++
 2 files changed, 21 insertions(+)
 create mode 100644 dbms/tests/queries/0_stateless/00989_parallel_parts_loading.reference
 create mode 100644 dbms/tests/queries/0_stateless/00989_parallel_parts_loading.sql

diff --git a/dbms/tests/queries/0_stateless/00989_parallel_parts_loading.reference b/dbms/tests/queries/0_stateless/00989_parallel_parts_loading.reference
new file mode 100644
index 00000000000..aa6663eb9c7
--- /dev/null
+++ b/dbms/tests/queries/0_stateless/00989_parallel_parts_loading.reference
@@ -0,0 +1,2 @@
+1000	499500
+1000	499500
diff --git a/dbms/tests/queries/0_stateless/00989_parallel_parts_loading.sql b/dbms/tests/queries/0_stateless/00989_parallel_parts_loading.sql
new file mode 100644
index 00000000000..5e0011483b3
--- /dev/null
+++ b/dbms/tests/queries/0_stateless/00989_parallel_parts_loading.sql
@@ -0,0 +1,19 @@
+DROP TABLE IF EXISTS mt;
+
+CREATE TABLE mt (x UInt64) ENGINE = MergeTree ORDER BY x SETTINGS max_part_loading_threads = 16, parts_to_delay_insert = 100000, parts_to_throw_insert = 100000;
+
+SYSTEM STOP MERGES;
+
+SET max_block_size = 1, min_insert_block_size_rows = 0, min_insert_block_size_bytes = 0;
+INSERT INTO mt SELECT * FROM numbers(1000);
+SET max_block_size = 65536;
+
+SELECT count(), sum(x) FROM mt;
+
+DETACH TABLE mt;
+ATTACH TABLE mt;
+
+SELECT count(), sum(x) FROM mt;
+
+SYSTEM START MERGES;
+DROP TABLE mt;