Function rewriteMapElement

src/Interpreters/QueryNormalizer.cpp:140–152

    }

    void rewriteMapElement(ASTPtr & ast, const String & map_name, const String & key_name)
    {
        String my_alias = ast->tryGetAlias();
        if (!key_name.empty())
        {
            // create identifier
            String implicit_name = getImplicitColNameForMapKey(map_name, key_name);
            ast = std::make_shared<ASTIdentifier>(implicit_name);
            ast->as<ASTIdentifier>()->is_implicit_map_key = true;
            //set alias back
            ast->setAlias(my_alias);
        }
    }
}

void QueryNormalizer::visit(ASTFunction & node, ASTPtr & ast, Data & data)