Fix recursive materialized view

dbms/src/DataStreams/PushingToViewsBlockOutputStream.cpp

 #include <DataStreams/AddingDefaultBlockOutputStream.h>
+#include <DataStreams/ConvertingBlockInputStream.h>
 #include <DataStreams/PushingToViewsBlockOutputStream.h>
 #include <DataStreams/SquashingBlockInputStream.h>
 #include <DataTypes/NestedUtils.h>
@@ -192,6 +193,7 @@ void PushingToViewsBlockOutputStream::process(const Block & block, size_t view_n
         /// and two-level aggregation is triggered).
         in = std::make_shared<SquashingBlockInputStream>(
             in, context.getSettingsRef().min_insert_block_size_rows, context.getSettingsRef().min_insert_block_size_bytes);
+        in = std::make_shared<ConvertingBlockInputStream>(context, in, view.out->getHeader(), ConvertingBlockInputStream::MatchColumnsMode::Position);
 
         in->readPrefix();
 

dbms/tests/queries/0_stateless/00975_recursive_materialized_view.reference

+2
+3
+3
+4

dbms/tests/queries/0_stateless/00975_recursive_materialized_view.sql

+DROP TABLE IF EXISTS test.src;
+DROP TABLE IF EXISTS test.dst1;
+DROP TABLE IF EXISTS test.dst2;
+
+USE test;
+
+CREATE TABLE src (x UInt8) ENGINE Memory;
+CREATE TABLE dst1 (x UInt8) ENGINE Memory;
+CREATE MATERIALIZED VIEW src_to_dst1 TO dst1 AS SELECT x + 1 as x FROM src;
+CREATE MATERIALIZED VIEW dst2 ENGINE Memory AS SELECT x + 1 as x FROM dst1;
+
+INSERT INTO src VALUES (1), (2);
+SELECT * FROM dst1 ORDER BY x;
+SELECT * FROM dst2 ORDER BY x;
+
+DROP TABLE src;
+DROP TABLE dst1;
+DROP TABLE dst2;