Merge branch 'new-branch' of https://github.com/ucasFL/ClickHouse into ucasFL-new-branch

src/Core/Settings.h

@@ -396,6 +396,7 @@ class IColumn;
     \
     M(Bool, force_optimize_skip_unused_shards_no_nested, false, "Obsolete setting, does nothing. Will be removed after 2020-12-01. Use force_optimize_skip_unused_shards_nesting instead.", 0) \
     M(Bool, experimental_use_processors, true, "Obsolete setting, does nothing. Will be removed after 2020-11-29.", 0) \
+    M(Bool, optimize_trivial_insert_select, true, "Optimize trivial 'INSERT INTO table SELECT ... FROM TABLES' query", 0) \
     M(Bool, allow_experimental_database_atomic, true, "Obsolete setting, does nothing. Will be removed after 2021-02-12", 0)
 
 #define FORMAT_FACTORY_SETTINGS(M) \

src/Interpreters/Common/config.h

@@ -0,0 +1,15 @@
+#pragma once
+
+// .h autogenerated by cmake!
+
+#define USE_RE2_ST 0
+#define USE_SSL 0
+#define USE_HDFS 0
+#define USE_AWS_S3 0
+#define USE_BROTLI 0
+#define USE_UNWIND 0
+#define USE_OPENCL 0
+#define USE_CASSANDRA 0
+#define USE_SENTRY 0
+#define USE_GRPC 0
+#define CLICKHOUSE_SPLIT_BINARY 0

src/Interpreters/Common/config_version.h

@@ -0,0 +1,50 @@
+#pragma once
+
+// .h autogenerated by cmake!
+
+#define USE_DBMS_TCP_PROTOCOL_VERSION 0
+
+#if USE_DBMS_TCP_PROTOCOL_VERSION
+    #include "Core/Defines.h"
+    #ifndef VERSION_REVISION
+        #define VERSION_REVISION DBMS_TCP_PROTOCOL_VERSION
+    #endif
+#else
+/* #undef VERSION_REVISION */
+#endif
+
+
+#define VERSION_NAME "Project"
+#define DBMS_NAME VERSION_NAME
+/* #undef VERSION_MAJOR */
+/* #undef VERSION_MINOR */
+/* #undef VERSION_PATCH */
+/* #undef VERSION_STRING */
+#define VERSION_STRING_SHORT "."
+/* #undef VERSION_OFFICIAL */
+#define VERSION_FULL "Project "
+/* #undef VERSION_DESCRIBE */
+/* #undef VERSION_GITHASH */
+#define VERSION_INTEGER ERROR
+
+#if defined(VERSION_MAJOR)
+#define DBMS_VERSION_MAJOR VERSION_MAJOR
+#else
+#define DBMS_VERSION_MAJOR 0
+#endif
+
+#if defined(VERSION_MINOR)
+#define DBMS_VERSION_MINOR VERSION_MINOR
+#else
+#define DBMS_VERSION_MINOR 0
+#endif
+
+#if defined(VERSION_PATCH)
+#define DBMS_VERSION_PATCH VERSION_PATCH
+#else
+#define DBMS_VERSION_PATCH 0
+#endif
+
+#if !defined(VERSION_OFFICIAL)
+#   define VERSION_OFFICIAL ""
+#endif

src/Interpreters/Core/include/config_core.h

@@ -0,0 +1,11 @@
+#pragma once
+
+// .h autogenerated by cmake!
+
+#define USE_ICU 0
+#define USE_MYSQL 0
+#define USE_RDKAFKA 0
+#define USE_EMBEDDED_COMPILER 0
+#define USE_INTERNAL_LLVM_LIBRARY 0
+#define USE_SSL 0
+#define USE_OPENCL 0

src/Interpreters/InterpreterInsertQuery.cpp

@@ -1,5 +1,6 @@
 #include <Interpreters/InterpreterInsertQuery.h>
 
+#include <Access/AccessFlags.h>
 #include <DataStreams/AddingDefaultBlockOutputStream.h>
 #include <DataStreams/AddingDefaultsBlockInputStream.h>
 #include <DataStreams/CheckConstraintsBlockOutputStream.h>
@@ -14,20 +15,20 @@
 #include <IO/ConcatReadBuffer.h>
 #include <Interpreters/InterpreterSelectWithUnionQuery.h>
 #include <Interpreters/InterpreterWatchQuery.h>
-#include <Access/AccessFlags.h>
 #include <Interpreters/JoinedTables.h>
 #include <Parsers/ASTFunction.h>
 #include <Parsers/ASTInsertQuery.h>
 #include <Parsers/ASTSelectQuery.h>
 #include <Parsers/ASTSelectWithUnionQuery.h>
+#include <Parsers/ASTTablesInSelectQuery.h>
 #include <Parsers/queryToString.h>
+#include <Processors/NullSink.h>
+#include <Processors/Sources/SinkToOutputStream.h>
+#include <Processors/Sources/SourceFromInputStream.h>
+#include <Processors/Transforms/ConvertingTransform.h>
 #include <Storages/StorageDistributed.h>
 #include <TableFunctions/TableFunctionFactory.h>
 #include <Common/checkStackSize.h>
-#include <Processors/Sources/SourceFromInputStream.h>
-#include <Processors/NullSink.h>
-#include <Processors/Transforms/ConvertingTransform.h>
-#include <Processors/Sources/SinkToOutputStream.h>
 
 
 namespace DB
@@ -200,9 +201,68 @@ BlockIO InterpreterInsertQuery::execute()
         size_t out_streams_size = 1;
         if (query.select)
         {
+            auto optimize_trivial_insert_select = settings.optimize_trivial_insert_select;
+            if (optimize_trivial_insert_select)
+            {
+                auto is_trivial_select = [](const auto && query_)
+                {
+                    if (query_.tables())
+                    {
+                        const auto & tables_in_select_query = query_.tables()->template as<ASTTablesInSelectQuery &>();
+                        for (const auto & child : tables_in_select_query.children)
+                        {
+                            const auto & table_element = child->template as<ASTTablesInSelectQueryElement &>();
+                            const auto & table_expr = table_element.table_expression->template as<ASTTableExpression &>();
+                            if (table_expr.subquery)
+                            {
+                                return false;
+                            }
+                        }
+                    }
+                    return (!query_.distinct && !query_.limit_with_ties && !query_.prewhere() && !query_.where() && !query_.groupBy()
+                        && !query_.having() && !query_.orderBy() && !query_.limitBy());
+                };
+
+                const auto & ast = query.select->as<ASTSelectWithUnionQuery &>();
+                size_t num_selects = ast.list_of_selects->children.size();
+                bool is_trivial_query = true;
+                for (size_t query_num = 0; query_num < num_selects; ++query_num)
+                {
+                    const auto & query_select = ast.list_of_selects->children.at(query_num)->as<ASTSelectQuery &>();
+                    if (!is_trivial_select(std::move(query_select)))
+                    {
+                        is_trivial_query = false;
+                        break;
+                    }
+                }
+
+                if (is_trivial_query)
+                {
+                    auto new_context = context;
+                    UInt64 max_threads = settings.max_insert_threads;
+                    UInt64 min_insert_block_size_rows = settings.min_insert_block_size_rows;
+                    new_context.setSetting("max_threads", std::max<UInt64>(1, max_threads));
+                    if (min_insert_block_size_rows)
+                        new_context.setSetting("max_block_size", min_insert_block_size_rows);
+
                     /// Passing 1 as subquery_depth will disable limiting size of intermediate result.
-            InterpreterSelectWithUnionQuery interpreter_select{ query.select, context, SelectQueryOptions(QueryProcessingStage::Complete, 1)};
+                    InterpreterSelectWithUnionQuery interpreter_select{
+                        query.select, new_context, SelectQueryOptions(QueryProcessingStage::Complete, 1)};
                     res = interpreter_select.execute();
+                }
+                else
+                {
+                    InterpreterSelectWithUnionQuery interpreter_select{
+                        query.select, context, SelectQueryOptions(QueryProcessingStage::Complete, 1)};
+                    res = interpreter_select.execute();
+                }
+            }
+            else
+            {
+                InterpreterSelectWithUnionQuery interpreter_select{
+                    query.select, context, SelectQueryOptions(QueryProcessingStage::Complete, 1)};
+                res = interpreter_select.execute();
+            }
 
             if (table->supportsParallelInsert() && settings.max_insert_threads > 1)
                 out_streams_size = std::min(size_t(settings.max_insert_threads), res.pipeline.getNumStreams());

tests/queries/0_stateless/00340_squashing_insert_select.sql

@@ -1,6 +1,7 @@
 DROP TABLE IF EXISTS numbers_squashed;
 CREATE TABLE numbers_squashed AS system.numbers ENGINE = StripeLog;
 
+SET optimize_trivial_insert_select = 'false';
 SET max_block_size = 10000;
 
 SET min_insert_block_size_rows = 1000000;

tests/queries/0_stateless/01278_min_insert_block_size_rows_for_materialized_views.sh

@@ -78,7 +78,7 @@ insert into data_01278 select
 from numbers(100000); -- { serverError 241; }
 EOL
     } | {
-        execute --max_memory_usage=$TEST_01278_MEMORY "$@"
+        execute --max_memory_usage=$TEST_01278_MEMORY --optimize_trivial_insert_select='false' "$@"
     }
     echo 'select count() from out_01278' | execute
 }