Using lexer (incomplete) [#CLICKHOUSE-2].

dbms/src/Parsers/ParserCase.cpp

@@ -17,7 +17,7 @@ bool ParserCase::parseImpl(Pos & pos, ASTPtr & node, Expected & expected)
     ParserKeyword s_then{"THEN"};
     ParserKeyword s_else{"ELSE"};
     ParserKeyword s_end{ "END"};
-    ParserExpression p_expr{false};
+    ParserExpressionWithOptionalAlias p_expr{false};
 
     if (!s_case.parse(pos, node, expected))
     {

dbms/src/Parsers/ParserKillQueryQuery.cpp

@@ -27,7 +27,7 @@ bool ParserKillQueryQuery::parseImpl(Pos & pos, ASTPtr & node, Expected & expect
     if (!ParserKeyword{"WHERE"}.ignore(pos, expected))
         return false;
 
-    ParserExpression p_where_expression(false);
+    ParserExpression p_where_expression;
     if (!p_where_expression.parse(pos, query->where_expression, expected))
         return false;
 

dbms/src/Parsers/ParserSelectQuery.cpp

@@ -44,7 +44,7 @@ bool ParserSelectQuery::parseImpl(Pos & pos, ASTPtr & node, Expected & expected)
 
     ParserNotEmptyExpressionList exp_list(false);
     ParserNotEmptyExpressionList exp_list_for_select_clause(true);    /// Allows aliases without AS keyword.
-    ParserExpression exp_elem(false);
+    ParserExpression exp_elem;
     ParserOrderByExpressionList order_list;
 
     /// SELECT [DISTINCT] expr list