dbms: added tests; fixed error in prev. revision [#METR-17472].

dbms/src/Interpreters/ExpressionAnalyzer.cpp

@@ -603,7 +603,7 @@ void ExpressionAnalyzer::executeScalarSubqueriesImpl(ASTPtr & ast)
 			tuple->name = "tuple";
 			ASTExpressionList * exp_list = new ASTExpressionList(ast->range);
 			tuple->arguments = exp_list;
-			tuple->children.push_back(exp_list);
+			tuple->children.push_back(tuple->arguments);
 
 			exp_list->children.resize(columns);
 			for (size_t i = 0; i < columns; ++i)

dbms/tests/queries/0_stateless/00205_scalar_subqueries.reference

+1	1

dbms/tests/queries/0_stateless/00205_scalar_subqueries.sql

+SELECT (SELECT (SELECT (SELECT (SELECT (SELECT count() FROM (SELECT * FROM system.numbers LIMIT 10)))))) = (SELECT 10), ((SELECT 1, 'Hello', [1, 2]).3)[1];