Merge branch 'master' of github.com:ClickHouse/ClickHouse into fix-union-distinct

contrib/grpc

@@ -1 +1 @@
-Subproject commit 48d1d322358658d8ac6d9b284de9f4ad1ac2bc6b
+Subproject commit 80e8fd63fef4a8d35c1abe612854f238eadadf0a

docs/en/getting-started/install.md

@@ -380,7 +380,7 @@ build.
 
 ### macOS-only: Install with Homebrew
 
-To install ClickHouse using the popular `brew` package manager, follow the instructions listed in the [ClickHouse Homebrew tap](https://github.com/ClickHouse/homebrew-clickhouse).
+To install ClickHouse using [homebrew](https://brew.sh/), see [here](https://formulae.brew.sh/cask/clickhouse).
 
 ## Launch {#launch}
 

docs/en/sql-reference/functions/array-functions.md

@@ -1144,11 +1144,32 @@ SELECT arrayFold( x,acc -> acc + x*2,  [1, 2, 3, 4], toInt64(3)) AS res;
 Result:
 
 ``` text
-┌─arrayFold(lambda(tuple(x, acc), plus(acc, multiply(x, 2))), [1, 2, 3, 4], toInt64(3))─┐
-│                                                                                     3 │
-└───────────────────────────────────────────────────────────────────────────────────────┘
+┌─res─┐
+│  23 │
+└─────┘
 ```
 
+**Example with the Fibonacci sequence**
+
+```sql
+SELECT arrayFold( x, acc -> (acc.2, acc.2 + acc.1), range(number), (1::Int64, 0::Int64)).1 AS fibonacci
+FROM numbers(1,10);
+
+┌─fibonacci─┐
+│         0 │
+│         1 │
+│         1 │
+│         2 │
+│         3 │
+│         5 │
+│         8 │
+│        13 │
+│        21 │
+│        34 │
+└───────────┘
+```
+
+
 ## arrayReverse(arr)
 
 Returns an array of the same size as the original array containing the elements in reverse order.

tests/analyzer_tech_debt.txt

@@ -85,3 +85,4 @@
 01940_custom_tld_sharding_key
 02815_range_dict_no_direct_join
 02861_join_on_nullsafe_compare
+01019_alter_materialized_view_consistent

tests/queries/0_stateless/02901_parallel_replicas_rollup.reference

@@ -0,0 +1,15 @@
+1
+02901_parallel_replicas_rollup-default	Used parallel replicas: true
+0	0	0	6
+2019	0	0	2
+2019	1	0	2
+2019	1	5	1
+2019	1	15	1
+2020	0	0	4
+2020	1	0	2
+2020	1	5	1
+2020	1	15	1
+2020	10	0	2
+2020	10	5	1
+2020	10	15	1
+02901_parallel_replicas_rollup2-default	Used parallel replicas: true

tests/queries/0_stateless/02901_parallel_replicas_rollup.sh

@@ -0,0 +1,74 @@
+#!/usr/bin/env bash
+
+CUR_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
+# shellcheck source=../shell_config.sh
+. "$CUR_DIR"/../shell_config.sh
+
+function were_parallel_replicas_used ()
+{
+    $CLICKHOUSE_CLIENT --query "SYSTEM FLUSH LOGS"
+
+    # Not using current_database = '$CLICKHOUSE_DATABASE' as nested parallel queries aren't run with it
+    $CLICKHOUSE_CLIENT --query "
+        SELECT
+            initial_query_id,
+            concat('Used parallel replicas: ', (countIf(initial_query_id != query_id) != 0)::bool::String) as used
+        FROM system.query_log
+    WHERE event_date >= yesterday()
+      AND initial_query_id = '$1'
+    GROUP BY initial_query_id
+    ORDER BY min(event_time_microseconds) ASC
+    FORMAT TSV"
+}
+
+$CLICKHOUSE_CLIENT --query "DROP TABLE IF EXISTS nested"
+$CLICKHOUSE_CLIENT --query "CREATE TABLE nested (x UInt8) ENGINE = MergeTree ORDER BY () AS Select 1";
+
+query_id="02901_parallel_replicas_rollup-$CLICKHOUSE_DATABASE"
+$CLICKHOUSE_CLIENT \
+  --query_id "${query_id}" \
+  --max_parallel_replicas 3 \
+  --prefer_localhost_replica 1 \
+  --use_hedged_requests 0 \
+  --cluster_for_parallel_replicas "parallel_replicas" \
+  --allow_experimental_parallel_reading_from_replicas 1 \
+  --parallel_replicas_for_non_replicated_merge_tree 1 \
+  --parallel_replicas_min_number_of_rows_per_replica 0 \
+  --query "
+  SELECT 1 FROM nested
+  GROUP BY 1 WITH ROLLUP
+  ORDER BY max((SELECT 1 WHERE 0));
+";
+were_parallel_replicas_used $query_id
+$CLICKHOUSE_CLIENT --query "DROP TABLE IF EXISTS nested"
+
+
+$CLICKHOUSE_CLIENT --query "DROP TABLE IF EXISTS days"
+$CLICKHOUSE_CLIENT --query "
+    CREATE TABLE days
+    (
+        year Int64,
+        month Int64,
+        day Int64
+    )
+    ENGINE = MergeTree()
+    ORDER BY year";
+$CLICKHOUSE_CLIENT --query "
+  INSERT INTO days VALUES (2019, 1, 5), (2019, 1, 15), (2020, 1, 5), (2020, 1, 15), (2020, 10, 5), (2020, 10, 15);
+";
+
+# Note that we enforce ordering of the final output because it's not guaranteed by GROUP BY ROLLUP, only the values of count() are
+query_id="02901_parallel_replicas_rollup2-$CLICKHOUSE_DATABASE"
+$CLICKHOUSE_CLIENT \
+  --query_id "${query_id}" \
+  --max_parallel_replicas 3 \
+  --prefer_localhost_replica 1 \
+  --use_hedged_requests 0 \
+  --cluster_for_parallel_replicas "parallel_replicas" \
+  --allow_experimental_parallel_reading_from_replicas 1 \
+  --parallel_replicas_for_non_replicated_merge_tree 1 \
+  --parallel_replicas_min_number_of_rows_per_replica 0 \
+  --query "SELECT * FROM (SELECT year, month, day, count(*) FROM days GROUP BY year, month, day WITH ROLLUP) ORDER BY 1, 2, 3";
+
+were_parallel_replicas_used $query_id
+$CLICKHOUSE_CLIENT --query "DROP TABLE IF EXISTS days"

utils/check-style/aspell-ignore/en/aspell-dict.txt

@@ -1455,6 +1455,7 @@ farmFingerprint
 farmHash
 fastops
 fcoverage
+fibonacci
 fifo
 filesystem
 filesystemAvailable