Merge branch 'master' of github.com:ClickHouse/ClickHouse

dbms/tests/performance/prewhere.xml

+<test>
+    <type>loop</type>
+
+    <stop_conditions>
+        <all_of>
+            <iterations>5</iterations>
+            <min_time_not_changing_for_ms>10000</min_time_not_changing_for_ms>
+        </all_of>
+        <any_of>
+            <iterations>50</iterations>
+            <total_time_ms>60000</total_time_ms>
+        </any_of>
+    </stop_conditions>
+
+    <main_metric>
+        <min_time />
+    </main_metric>
+
+    <preconditions>
+        <table_exists>default.hits_10m_single</table_exists>
+    </preconditions>
+
+    <settings>
+        <max_threads>1</max_threads>
+    </settings>
+
+    <query>SELECT Title, URL FROM hits_10m_single PREWHERE WatchID % 2 = 1 WHERE UserID = 10000 FORMAT Null</query>
+</test>

docker/builder/build.sh

@@ -3,7 +3,7 @@
 #ccache -s # uncomment to display CCache statistics
 mkdir -p /server/build_docker
 cd /server/build_docker
-cmake -G Ninja /server -DCMAKE_C_COMPILER=`which gcc-8` -DCMAKE_CXX_COMPILER=`which g++-8`
+cmake -G Ninja /server -DCMAKE_C_COMPILER=`which gcc-9` -DCMAKE_CXX_COMPILER=`which g++-9`
 
 # Set the number of build jobs to the half of number of virtual CPU cores (rounded up).
 # By default, ninja use all virtual CPU cores, that leads to very high memory consumption without much improvement in build time.