From 74e785a2fedb8f6c49d85e9e66ae7c34bf29195a Mon Sep 17 00:00:00 2001
From: Nikolai Kochetov <nik-kochetov@yandex-team.ru>
Date: Wed, 23 Sep 2020 20:42:46 +0300
Subject: [PATCH] Add optimize setting to explain plan.

---
 src/Interpreters/InterpreterExplainQuery.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/Interpreters/InterpreterExplainQuery.cpp b/src/Interpreters/InterpreterExplainQuery.cpp
index c936556ce39..a0a63dfed08 100644
--- a/src/Interpreters/InterpreterExplainQuery.cpp
+++ b/src/Interpreters/InterpreterExplainQuery.cpp
@@ -119,13 +119,17 @@ struct QueryPlanSettings
 {
     QueryPlan::ExplainPlanOptions query_plan_options;
 
+    /// Apply query plan optimisations.
+    bool optimize = true;
+
     constexpr static char name[] = "PLAN";
 
     std::unordered_map<std::string, std::reference_wrapper<bool>> boolean_settings =
     {
             {"header", query_plan_options.header},
             {"description", query_plan_options.description},
-            {"actions", query_plan_options.actions}
+            {"actions", query_plan_options.actions},
+            {"optimize", optimize},
     };
 };
 
@@ -248,7 +252,8 @@ BlockInputStreamPtr InterpreterExplainQuery::executeImpl()
         InterpreterSelectWithUnionQuery interpreter(ast.getExplainedQuery(), context, SelectQueryOptions());
         interpreter.buildQueryPlan(plan);
 
-        plan.optimize();
+        if (settings.optimize)
+            plan.optimize();
 
         WriteBufferFromOStream buffer(ss);
         plan.explainPlan(buffer, settings.query_plan_options);