From efbcac4e600430262e4999c2a799e92dc6e5c4c8 Mon Sep 17 00:00:00 2001
From: Smita Kulkarni <Smita.Kulkarni@clickhouse.com>
Date: Wed, 25 Oct 2023 10:21:06 +0200
Subject: [PATCH] Bug fix explain ast with parameterized view

---
 src/Interpreters/executeQuery.cpp                    |  6 ++++++
 .../02903_parameterized_view_explain_ast.reference   | 12 ++++++++++++
 .../02903_parameterized_view_explain_ast.sql         |  3 +++
 3 files changed, 21 insertions(+)
 create mode 100644 tests/queries/0_stateless/02903_parameterized_view_explain_ast.reference
 create mode 100644 tests/queries/0_stateless/02903_parameterized_view_explain_ast.sql

diff --git a/src/Interpreters/executeQuery.cpp b/src/Interpreters/executeQuery.cpp
index decda4c62f9..557f80e8d70 100644
--- a/src/Interpreters/executeQuery.cpp
+++ b/src/Interpreters/executeQuery.cpp
@@ -730,6 +730,12 @@ static std::tuple<ASTPtr, BlockIO> executeQueryImpl(
         bool is_create_parameterized_view = false;
         if (const auto * create_query = ast->as<ASTCreateQuery>())
             is_create_parameterized_view = create_query->isParameterizedView();
+        else if (const auto * explain_query = ast->as<ASTExplainQuery>())
+        {
+            assert(explain_query->children.size() => 1);
+            if (const auto * create_of_explain_query = explain_query->children[0]->as<ASTCreateQuery>())
+                is_create_parameterized_view = create_of_explain_query->isParameterizedView();
+        }
 
         /// Replace ASTQueryParameter with ASTLiteral for prepared statements.
         /// Even if we don't have parameters in query_context, check that AST doesn't have unknown parameters
diff --git a/tests/queries/0_stateless/02903_parameterized_view_explain_ast.reference b/tests/queries/0_stateless/02903_parameterized_view_explain_ast.reference
new file mode 100644
index 00000000000..6ee8d0c3d23
--- /dev/null
+++ b/tests/queries/0_stateless/02903_parameterized_view_explain_ast.reference
@@ -0,0 +1,12 @@
+CreateQuery  numbers_pv (children 2)
+ Identifier numbers_pv
+ SelectWithUnionQuery (children 1)
+  ExpressionList (children 1)
+   SelectQuery (children 3)
+    ExpressionList (children 1)
+     Asterisk
+    TablesInSelectQuery (children 1)
+     TablesInSelectQueryElement (children 1)
+      TableExpression (children 1)
+       TableIdentifier numbers
+    QueryParameter amount:UInt8
diff --git a/tests/queries/0_stateless/02903_parameterized_view_explain_ast.sql b/tests/queries/0_stateless/02903_parameterized_view_explain_ast.sql
new file mode 100644
index 00000000000..6af6dab2f4e
--- /dev/null
+++ b/tests/queries/0_stateless/02903_parameterized_view_explain_ast.sql
@@ -0,0 +1,3 @@
+EXPLAIN AST
+CREATE VIEW numbers_pv AS
+SELECT * FROM numbers LIMIT {amount:UInt8};
\ No newline at end of file