Analyzer support EXPLAIN ESTIMATE

src/Interpreters/InterpreterExplainQuery.cpp

@@ -536,11 +536,21 @@ QueryPipeline InterpreterExplainQuery::executeImpl()
 
             auto settings = checkAndGetSettings<QueryPlanSettings>(ast.getSettings());
             QueryPlan plan;
-            ContextPtr context;
+            ContextPtr context = getContext();
+
+            if (context->getSettingsRef().allow_experimental_analyzer)
+            {
+                InterpreterSelectQueryAnalyzer interpreter(ast.getExplainedQuery(), getContext(), SelectQueryOptions());
+                plan = std::move(interpreter).extractQueryPlan();
+                context = interpreter.getContext();
+            }
+            else
+            {
+                InterpreterSelectWithUnionQuery interpreter(ast.getExplainedQuery(), getContext(), SelectQueryOptions());
+                interpreter.buildQueryPlan(plan);
+                context = interpreter.getContext();
+            }
 
-            InterpreterSelectWithUnionQuery interpreter(ast.getExplainedQuery(), getContext(), SelectQueryOptions());
-            interpreter.buildQueryPlan(plan);
-            context = interpreter.getContext();
             // Collect the selected marks, rows, parts during build query pipeline.
             // Hold on to the returned QueryPipelineBuilderPtr because `plan` may have pointers into
             // it (through QueryPlanResourceHolder).

src/Storages/StorageDistributed.cpp

@@ -532,9 +532,6 @@ std::optional<QueryProcessingStage::Enum> StorageDistributed::getOptimizedQueryP
 
     const auto & query_node = query_info.query_tree->as<const QueryNode &>();
 
-    // std::cerr << query_node.dumpTree() << std::endl;
-    // std::cerr << query_info.table_expression->dumpTree() << std::endl;
-
     auto expr_contains_sharding_key = [&](const ListNode & exprs) -> bool
     {
         std::unordered_set<std::string> expr_columns;

tests/queries/0_stateless/02911_analyzer_explain_estimate.sql

@@ -0,0 +1,5 @@
+-- Tags: distributed
+
+SET allow_experimental_analyzer = 1;
+
+EXPLAIN ESTIMATE SELECT 0 = 1048577, NULL, groupBitmapOr(bitmapBuild([toInt32(65537)])) FROM cluster(test_cluster_two_shards) WHERE NULL = 1048575;