From a3a8b2bbf77c094359d8a1bc5b14dc6d26671cb8 Mon Sep 17 00:00:00 2001
From: Ivan Lezhankin <ilezhankin@yandex-team.ru>
Date: Mon, 11 Mar 2019 17:01:45 +0300
Subject: [PATCH] Include IAST_fwd.h for using ASTPtr

---
 dbms/src/Compression/CompressionFactory.h     | 19 +++++++------
 dbms/src/DataTypes/DataTypeFactory.h          | 14 +++++-----
 dbms/src/Databases/IDatabase.h                | 18 ++++++-------
 dbms/src/Interpreters/Aliases.h               |  8 +++---
 dbms/src/Interpreters/Context.h               | 27 +++++++++----------
 .../Interpreters/DatabaseAndTableWithAlias.h  | 10 +++----
 dbms/src/Interpreters/ExpressionAnalyzer.h    |  7 +++--
 dbms/src/Interpreters/InterpreterAlterQuery.h |  3 +--
 .../Interpreters/InterpreterDescribeQuery.h   |  3 +--
 dbms/src/Interpreters/InterpreterDropQuery.h  |  6 ++---
 .../src/Interpreters/InterpreterExistsQuery.h |  3 +--
 .../Interpreters/InterpreterExplainQuery.h    |  5 +---
 dbms/src/Interpreters/InterpreterFactory.h    |  3 +--
 .../Interpreters/InterpreterKillQueryQuery.h  |  4 +--
 .../Interpreters/InterpreterOptimizeQuery.h   |  3 +--
 .../src/Interpreters/InterpreterRenameQuery.h |  3 +--
 .../Interpreters/InterpreterSelectQuery.cpp   |  6 +++--
 dbms/src/Interpreters/InterpreterSetQuery.h   |  3 +--
 .../Interpreters/InterpreterShowCreateQuery.h |  3 +--
 .../InterpreterShowProcesslistQuery.h         |  3 +--
 .../Interpreters/InterpreterShowTablesQuery.h |  3 +--
 .../src/Interpreters/InterpreterSystemQuery.h |  4 +--
 dbms/src/Interpreters/InterpreterUseQuery.h   |  3 +--
 dbms/src/Storages/StorageMaterializedView.h   |  5 +---
 dbms/src/Storages/StorageView.h               | 10 +++----
 dbms/src/TableFunctions/ITableFunction.h      |  5 ++--
 26 files changed, 76 insertions(+), 105 deletions(-)

diff --git a/dbms/src/Compression/CompressionFactory.h b/dbms/src/Compression/CompressionFactory.h
index db28a19201..b36bed1cf8 100644
--- a/dbms/src/Compression/CompressionFactory.h
+++ b/dbms/src/Compression/CompressionFactory.h
@@ -1,14 +1,17 @@
 #pragma once
 
-#include <memory>
+#include <Compression/CompressionInfo.h>
+#include <Compression/ICompressionCodec.h>
+#include <DataTypes/IDataType.h>
+#include <Parsers/IAST_fwd.h>
+#include <Common/IFactoryWithAliases.h>
+
+#include <ext/singleton.h>
+
 #include <functional>
+#include <memory>
 #include <optional>
 #include <unordered_map>
-#include <ext/singleton.h>
-#include <DataTypes/IDataType.h>
-#include <Common/IFactoryWithAliases.h>
-#include <Compression/ICompressionCodec.h>
-#include <Compression/CompressionInfo.h>
 
 namespace DB
 {
@@ -19,10 +22,6 @@ using CompressionCodecPtr = std::shared_ptr<ICompressionCodec>;
 
 using CodecNameWithLevel = std::pair<String, std::optional<int>>;
 
-class IAST;
-
-using ASTPtr = std::shared_ptr<IAST>;
-
 /** Creates a codec object by name of compression algorithm family and parameters.
  */
 class CompressionCodecFactory final : public ext::singleton<CompressionCodecFactory>
diff --git a/dbms/src/DataTypes/DataTypeFactory.h b/dbms/src/DataTypes/DataTypeFactory.h
index 95cda9002f..c6ef100bbb 100644
--- a/dbms/src/DataTypes/DataTypeFactory.h
+++ b/dbms/src/DataTypes/DataTypeFactory.h
@@ -1,12 +1,15 @@
 #pragma once
 
-#include <memory>
-#include <functional>
-#include <unordered_map>
-#include <Common/IFactoryWithAliases.h>
 #include <DataTypes/IDataType.h>
+#include <Parsers/IAST_fwd.h>
+#include <Common/IFactoryWithAliases.h>
+
 #include <ext/singleton.h>
 
+#include <functional>
+#include <memory>
+#include <unordered_map>
+
 
 namespace DB
 {
@@ -17,9 +20,6 @@ using DataTypePtr = std::shared_ptr<const IDataType>;
 class IDataTypeDomain;
 using DataTypeDomainPtr = std::unique_ptr<const IDataTypeDomain>;
 
-class IAST;
-using ASTPtr = std::shared_ptr<IAST>;
-
 
 /** Creates a data type by name of data type family and parameters.
   */
diff --git a/dbms/src/Databases/IDatabase.h b/dbms/src/Databases/IDatabase.h
index e6b67a87c9..7c0d501fc6 100644
--- a/dbms/src/Databases/IDatabase.h
+++ b/dbms/src/Databases/IDatabase.h
@@ -1,16 +1,18 @@
 #pragma once
 
-#include <Core/Types.h>
 #include <Core/NamesAndTypes.h>
+#include <Core/Types.h>
+#include <Interpreters/Context.h>
+#include <Parsers/IAST_fwd.h>
 #include <Storages/ColumnsDescription.h>
 #include <Storages/IndicesDescription.h>
-#include <ctime>
-#include <memory>
-#include <functional>
 #include <Poco/File.h>
-#include <Common/escapeForFileName.h>
 #include <Common/ThreadPool.h>
-#include <Interpreters/Context.h>
+#include <Common/escapeForFileName.h>
+
+#include <ctime>
+#include <functional>
+#include <memory>
 
 
 namespace DB
@@ -21,9 +23,6 @@ class Context;
 class IStorage;
 using StoragePtr = std::shared_ptr<IStorage>;
 
-class IAST;
-using ASTPtr = std::shared_ptr<IAST>;
-
 struct Settings;
 
 
@@ -157,4 +156,3 @@ using DatabasePtr = std::shared_ptr<IDatabase>;
 using Databases = std::map<String, DatabasePtr>;
 
 }
-
diff --git a/dbms/src/Interpreters/Aliases.h b/dbms/src/Interpreters/Aliases.h
index 80976c7551..5215944222 100644
--- a/dbms/src/Interpreters/Aliases.h
+++ b/dbms/src/Interpreters/Aliases.h
@@ -1,15 +1,13 @@
 #pragma once
 
-#include <unordered_map>
-
 #include <Core/Types.h>
+#include <Parsers/IAST_fwd.h>
+
+#include <unordered_map>
 
 namespace DB
 {
 
-class IAST;
-using ASTPtr = std::shared_ptr<IAST>;
-
 using Aliases = std::unordered_map<String, ASTPtr>;
 
 }
diff --git a/dbms/src/Interpreters/Context.h b/dbms/src/Interpreters/Context.h
index 8b4e66094f..4f90a50e34 100644
--- a/dbms/src/Interpreters/Context.h
+++ b/dbms/src/Interpreters/Context.h
@@ -1,23 +1,24 @@
 #pragma once
 
+#include <Core/Block.h>
+#include <Core/NamesAndTypes.h>
+#include <Core/Types.h>
+#include <Interpreters/ClientInfo.h>
+#include <Interpreters/Settings.h>
+#include <Parsers/IAST_fwd.h>
+#include <Common/LRUCache.h>
+#include <Common/MultiVersion.h>
+#include <Common/ThreadPool.h>
+#include <Common/config.h>
+
+#include <atomic>
 #include <chrono>
 #include <condition_variable>
 #include <functional>
 #include <memory>
 #include <mutex>
-#include <thread>
-#include <atomic>
 #include <optional>
-
-#include <Common/config.h>
-#include <Common/MultiVersion.h>
-#include <Common/LRUCache.h>
-#include <Common/ThreadPool.h>
-#include <Core/Types.h>
-#include <Core/NamesAndTypes.h>
-#include <Core/Block.h>
-#include <Interpreters/Settings.h>
-#include <Interpreters/ClientInfo.h>
+#include <thread>
 
 
 namespace Poco
@@ -68,8 +69,6 @@ class IStorage;
 class ITableFunction;
 using StoragePtr = std::shared_ptr<IStorage>;
 using Tables = std::map<String, StoragePtr>;
-class IAST;
-using ASTPtr = std::shared_ptr<IAST>;
 class IBlockInputStream;
 class IBlockOutputStream;
 using BlockInputStreamPtr = std::shared_ptr<IBlockInputStream>;
diff --git a/dbms/src/Interpreters/DatabaseAndTableWithAlias.h b/dbms/src/Interpreters/DatabaseAndTableWithAlias.h
index 0f1cbe8bbc..22b03a5ed4 100644
--- a/dbms/src/Interpreters/DatabaseAndTableWithAlias.h
+++ b/dbms/src/Interpreters/DatabaseAndTableWithAlias.h
@@ -1,18 +1,16 @@
 #pragma once
 
+#include <Core/Names.h>
+#include <Core/Types.h>
+#include <Parsers/IAST_fwd.h>
+
 #include <memory>
 #include <optional>
 
-#include <Core/Types.h>
-#include <Core/Names.h>
-
 
 namespace DB
 {
 
-class IAST;
-using ASTPtr = std::shared_ptr<IAST>;
-
 class ASTSelectQuery;
 class ASTIdentifier;
 struct ASTTableExpression;
diff --git a/dbms/src/Interpreters/ExpressionAnalyzer.h b/dbms/src/Interpreters/ExpressionAnalyzer.h
index c7441efe4c..b9ec5c3ca7 100644
--- a/dbms/src/Interpreters/ExpressionAnalyzer.h
+++ b/dbms/src/Interpreters/ExpressionAnalyzer.h
@@ -1,9 +1,11 @@
 #pragma once
 
+#include <Interpreters/ActionsVisitor.h>
 #include <Interpreters/AggregateDescription.h>
 #include <Interpreters/Settings.h>
-#include <Interpreters/ActionsVisitor.h>
 #include <Interpreters/SyntaxAnalyzer.h>
+#include <Parsers/IAST_fwd.h>
+
 
 namespace DB
 {
@@ -15,9 +17,6 @@ struct ExpressionActionsChain;
 class ExpressionActions;
 using ExpressionActionsPtr = std::shared_ptr<ExpressionActions>;
 
-class IAST;
-using ASTPtr = std::shared_ptr<IAST>;
-using ASTs = std::vector<ASTPtr>;
 struct ASTTableJoin;
 
 class IBlockInputStream;
diff --git a/dbms/src/Interpreters/InterpreterAlterQuery.h b/dbms/src/Interpreters/InterpreterAlterQuery.h
index bd9f3a89d6..776409a225 100644
--- a/dbms/src/Interpreters/InterpreterAlterQuery.h
+++ b/dbms/src/Interpreters/InterpreterAlterQuery.h
@@ -1,14 +1,13 @@
 #pragma once
 
 #include <Interpreters/IInterpreter.h>
+#include <Parsers/IAST_fwd.h>
 
 
 namespace DB
 {
 
 class Context;
-class IAST;
-using ASTPtr = std::shared_ptr<IAST>;
 
 /** Allows you add or remove a column in the table.
   * It also allows you to manipulate the partitions of the MergeTree family tables.
diff --git a/dbms/src/Interpreters/InterpreterDescribeQuery.h b/dbms/src/Interpreters/InterpreterDescribeQuery.h
index fc0bea10f2..4fafe61f22 100644
--- a/dbms/src/Interpreters/InterpreterDescribeQuery.h
+++ b/dbms/src/Interpreters/InterpreterDescribeQuery.h
@@ -1,14 +1,13 @@
 #pragma once
 
 #include <Interpreters/IInterpreter.h>
+#include <Parsers/IAST_fwd.h>
 
 
 namespace DB
 {
 
 class Context;
-class IAST;
-using ASTPtr = std::shared_ptr<IAST>;
 
 
 /** Return names, types and other information about columns in specified table.
diff --git a/dbms/src/Interpreters/InterpreterDropQuery.h b/dbms/src/Interpreters/InterpreterDropQuery.h
index 2bea9f85c9..1493d262a2 100644
--- a/dbms/src/Interpreters/InterpreterDropQuery.h
+++ b/dbms/src/Interpreters/InterpreterDropQuery.h
@@ -1,16 +1,14 @@
 #pragma once
 
+#include <Databases/IDatabase.h>
 #include <Interpreters/IInterpreter.h>
 #include <Parsers/ASTDropQuery.h>
-#include <Databases/IDatabase.h>
-
+#include <Parsers/IAST_fwd.h>
 
 
 namespace DB
 {
 class Context;
-class IAST;
-using ASTPtr = std::shared_ptr<IAST>;
 using DatabaseAndTable = std::pair<DatabasePtr, StoragePtr>;
 
 /** Allow to either drop table with all its data (DROP),
diff --git a/dbms/src/Interpreters/InterpreterExistsQuery.h b/dbms/src/Interpreters/InterpreterExistsQuery.h
index b2050b443d..1860e1d0aa 100644
--- a/dbms/src/Interpreters/InterpreterExistsQuery.h
+++ b/dbms/src/Interpreters/InterpreterExistsQuery.h
@@ -1,14 +1,13 @@
 #pragma once
 
 #include <Interpreters/IInterpreter.h>
+#include <Parsers/IAST_fwd.h>
 
 
 namespace DB
 {
 
 class Context;
-class IAST;
-using ASTPtr = std::shared_ptr<IAST>;
 
 
 /** Check that table exists. Return single row with single column "result" of type UInt8 and value 0 or 1.
diff --git a/dbms/src/Interpreters/InterpreterExplainQuery.h b/dbms/src/Interpreters/InterpreterExplainQuery.h
index 4db796ad01..0d3b183857 100644
--- a/dbms/src/Interpreters/InterpreterExplainQuery.h
+++ b/dbms/src/Interpreters/InterpreterExplainQuery.h
@@ -2,15 +2,12 @@
 
 #include <Interpreters/Context.h>
 #include <Interpreters/IInterpreter.h>
+#include <Parsers/IAST_fwd.h>
 
 
 namespace DB
 {
 
-class IAST;
-using ASTPtr = std::shared_ptr<IAST>;
-
-
 /// Returns single row with explain results
 class InterpreterExplainQuery : public IInterpreter
 {
diff --git a/dbms/src/Interpreters/InterpreterFactory.h b/dbms/src/Interpreters/InterpreterFactory.h
index 25bad6659d..1f065bbf69 100644
--- a/dbms/src/Interpreters/InterpreterFactory.h
+++ b/dbms/src/Interpreters/InterpreterFactory.h
@@ -2,14 +2,13 @@
 
 #include <Core/QueryProcessingStage.h>
 #include <Interpreters/IInterpreter.h>
+#include <Parsers/IAST_fwd.h>
 
 
 namespace DB
 {
 
 class Context;
-class IAST;
-using ASTPtr = std::shared_ptr<IAST>;
 
 
 class InterpreterFactory
diff --git a/dbms/src/Interpreters/InterpreterKillQueryQuery.h b/dbms/src/Interpreters/InterpreterKillQueryQuery.h
index 9294e45eab..fab4b30486 100644
--- a/dbms/src/Interpreters/InterpreterKillQueryQuery.h
+++ b/dbms/src/Interpreters/InterpreterKillQueryQuery.h
@@ -1,14 +1,13 @@
 #pragma once
 
 #include <Interpreters/IInterpreter.h>
+#include <Parsers/IAST.h>
 
 
 namespace DB
 {
 
 class Context;
-class IAST;
-using ASTPtr = std::shared_ptr<IAST>;
 
 
 class InterpreterKillQueryQuery : public IInterpreter
@@ -28,4 +27,3 @@ private:
 
 
 }
-
diff --git a/dbms/src/Interpreters/InterpreterOptimizeQuery.h b/dbms/src/Interpreters/InterpreterOptimizeQuery.h
index 03c369b0e4..251d8ea02f 100644
--- a/dbms/src/Interpreters/InterpreterOptimizeQuery.h
+++ b/dbms/src/Interpreters/InterpreterOptimizeQuery.h
@@ -1,14 +1,13 @@
 #pragma once
 
 #include <Interpreters/IInterpreter.h>
+#include <Parsers/IAST_fwd.h>
 
 
 namespace DB
 {
 
 class Context;
-class IAST;
-using ASTPtr = std::shared_ptr<IAST>;
 
 
 /** Just call method "optimize" for table.
diff --git a/dbms/src/Interpreters/InterpreterRenameQuery.h b/dbms/src/Interpreters/InterpreterRenameQuery.h
index e9a36277ef..0433c63846 100644
--- a/dbms/src/Interpreters/InterpreterRenameQuery.h
+++ b/dbms/src/Interpreters/InterpreterRenameQuery.h
@@ -1,14 +1,13 @@
 #pragma once
 
 #include <Interpreters/IInterpreter.h>
+#include <Parsers/IAST_fwd.h>
 
 
 namespace DB
 {
 
 class Context;
-class IAST;
-using ASTPtr = std::shared_ptr<IAST>;
 
 
 /** Rename one table
diff --git a/dbms/src/Interpreters/InterpreterSelectQuery.cpp b/dbms/src/Interpreters/InterpreterSelectQuery.cpp
index 44b8f85a93..70c2561988 100644
--- a/dbms/src/Interpreters/InterpreterSelectQuery.cpp
+++ b/dbms/src/Interpreters/InterpreterSelectQuery.cpp
@@ -1078,7 +1078,8 @@ void InterpreterSelectQuery::executeFetchColumns(
 
 void InterpreterSelectQuery::executeWhere(Pipeline & pipeline, const ExpressionActionsPtr & expression, bool remove_fiter)
 {
-    pipeline.transform([&](auto & stream) {
+    pipeline.transform([&](auto & stream)
+    {
         stream = std::make_shared<FilterBlockInputStream>(
             stream, expression, query_ptr->as<ASTSelectQuery>()->where_expression->getColumnName(), remove_fiter);
     });
@@ -1206,7 +1207,8 @@ void InterpreterSelectQuery::executeMergeAggregated(Pipeline & pipeline, bool ov
 
 void InterpreterSelectQuery::executeHaving(Pipeline & pipeline, const ExpressionActionsPtr & expression)
 {
-    pipeline.transform([&](auto & stream) {
+    pipeline.transform([&](auto & stream)
+    {
         stream = std::make_shared<FilterBlockInputStream>(
             stream, expression, query_ptr->as<ASTSelectQuery>()->having_expression->getColumnName());
     });
diff --git a/dbms/src/Interpreters/InterpreterSetQuery.h b/dbms/src/Interpreters/InterpreterSetQuery.h
index 7dbd444f6f..434765cf7d 100644
--- a/dbms/src/Interpreters/InterpreterSetQuery.h
+++ b/dbms/src/Interpreters/InterpreterSetQuery.h
@@ -1,15 +1,14 @@
 #pragma once
 
 #include <Interpreters/IInterpreter.h>
+#include <Parsers/IAST_fwd.h>
 
 
 namespace DB
 {
 
 class Context;
-class IAST;
 class ASTSetQuery;
-using ASTPtr = std::shared_ptr<IAST>;
 
 
 /** Change one or several settings for the session or just for the current context.
diff --git a/dbms/src/Interpreters/InterpreterShowCreateQuery.h b/dbms/src/Interpreters/InterpreterShowCreateQuery.h
index 5e8672c176..5ac98509b2 100644
--- a/dbms/src/Interpreters/InterpreterShowCreateQuery.h
+++ b/dbms/src/Interpreters/InterpreterShowCreateQuery.h
@@ -1,14 +1,13 @@
 #pragma once
 
 #include <Interpreters/IInterpreter.h>
+#include <Parsers/IAST_fwd.h>
 
 
 namespace DB
 {
 
 class Context;
-class IAST;
-using ASTPtr = std::shared_ptr<IAST>;
 
 
 /** Return single row with single column "statement" of type String with text of query to CREATE specified table.
diff --git a/dbms/src/Interpreters/InterpreterShowProcesslistQuery.h b/dbms/src/Interpreters/InterpreterShowProcesslistQuery.h
index ee180e7669..6b87fd7edc 100644
--- a/dbms/src/Interpreters/InterpreterShowProcesslistQuery.h
+++ b/dbms/src/Interpreters/InterpreterShowProcesslistQuery.h
@@ -1,14 +1,13 @@
 #pragma once
 
 #include <Interpreters/IInterpreter.h>
+#include <Parsers/IAST_fwd.h>
 
 
 namespace DB
 {
 
 class Context;
-class IAST;
-using ASTPtr = std::shared_ptr<IAST>;
 
 
 /** Return list of currently executing queries.
diff --git a/dbms/src/Interpreters/InterpreterShowTablesQuery.h b/dbms/src/Interpreters/InterpreterShowTablesQuery.h
index 3f661da3e2..fc5cb2b750 100644
--- a/dbms/src/Interpreters/InterpreterShowTablesQuery.h
+++ b/dbms/src/Interpreters/InterpreterShowTablesQuery.h
@@ -1,14 +1,13 @@
 #pragma once
 
 #include <Interpreters/IInterpreter.h>
+#include <Parsers/IAST_fwd.h>
 
 
 namespace DB
 {
 
 class Context;
-class IAST;
-using ASTPtr = std::shared_ptr<IAST>;
 
 
 /** Return a list of tables or databases meets specified conditions.
diff --git a/dbms/src/Interpreters/InterpreterSystemQuery.h b/dbms/src/Interpreters/InterpreterSystemQuery.h
index fb92e79976..65aaf78941 100644
--- a/dbms/src/Interpreters/InterpreterSystemQuery.h
+++ b/dbms/src/Interpreters/InterpreterSystemQuery.h
@@ -1,15 +1,15 @@
 #pragma once
+
 #include <Interpreters/IInterpreter.h>
+#include <Parsers/IAST_fwd.h>
 
 
 namespace DB
 {
 
 class Context;
-class IAST;
 class ASTSystemQuery;
 class IStorage;
-using ASTPtr = std::shared_ptr<IAST>;
 using StoragePtr = std::shared_ptr<IStorage>;
 
 
diff --git a/dbms/src/Interpreters/InterpreterUseQuery.h b/dbms/src/Interpreters/InterpreterUseQuery.h
index 988ccb741f..ae409117af 100644
--- a/dbms/src/Interpreters/InterpreterUseQuery.h
+++ b/dbms/src/Interpreters/InterpreterUseQuery.h
@@ -1,14 +1,13 @@
 #pragma once
 
 #include <Interpreters/IInterpreter.h>
+#include <Parsers/IAST_fwd.h>
 
 
 namespace DB
 {
 
 class Context;
-class IAST;
-using ASTPtr = std::shared_ptr<IAST>;
 
 
 /** Change default database for session.
diff --git a/dbms/src/Storages/StorageMaterializedView.h b/dbms/src/Storages/StorageMaterializedView.h
index 8c2657b484..665f6243a3 100644
--- a/dbms/src/Storages/StorageMaterializedView.h
+++ b/dbms/src/Storages/StorageMaterializedView.h
@@ -2,16 +2,13 @@
 
 #include <ext/shared_ptr_helper.h>
 
+#include <Parsers/IAST_fwd.h>
 #include <Storages/IStorage.h>
 
 
 namespace DB
 {
 
-class IAST; // XXX: should include full class - for proper use inside inline methods
-using ASTPtr = std::shared_ptr<IAST>;
-
-
 class StorageMaterializedView : public ext::shared_ptr_helper<StorageMaterializedView>, public IStorage
 {
 public:
diff --git a/dbms/src/Storages/StorageView.h b/dbms/src/Storages/StorageView.h
index fed6664b8e..afd9b5ce32 100644
--- a/dbms/src/Storages/StorageView.h
+++ b/dbms/src/Storages/StorageView.h
@@ -1,17 +1,15 @@
 #pragma once
 
-#include <ext/shared_ptr_helper.h>
-#include <Storages/IStorage.h>
 #include <Parsers/ASTSelectQuery.h>
+#include <Parsers/IAST_fwd.h>
+#include <Storages/IStorage.h>
+
+#include <ext/shared_ptr_helper.h>
 
 
 namespace DB
 {
 
-class IAST;
-using ASTPtr = std::shared_ptr<IAST>;
-
-
 class StorageView : public ext::shared_ptr_helper<StorageView>, public IStorage
 {
 public:
diff --git a/dbms/src/TableFunctions/ITableFunction.h b/dbms/src/TableFunctions/ITableFunction.h
index ddf900fa65..39ef7857a3 100644
--- a/dbms/src/TableFunctions/ITableFunction.h
+++ b/dbms/src/TableFunctions/ITableFunction.h
@@ -1,14 +1,15 @@
 #pragma once
 
+#include <Parsers/IAST_fwd.h>
+
 #include <string>
 #include <memory>
 
+
 namespace DB
 {
 
 class Context;
-class IAST;
-using ASTPtr = std::shared_ptr<IAST>;
 class IStorage;
 using StoragePtr = std::shared_ptr<IStorage>;
 
-- 
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