1 /*
2 * Copyright (c) 2015, 2021, Oracle and/or its affiliates.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License, version 2.0,
6 * as published by the Free Software Foundation.
7 *
8 * This program is also distributed with certain software (including
9 * but not limited to OpenSSL) that is licensed under separate terms,
10 * as designated in a particular file or component or in included license
11 * documentation. The authors of MySQL hereby grant you an additional
12 * permission to link the program and your derivative works with the
13 * separately licensed software that they have included with MySQL.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License, version 2.0, for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
23 * 02110-1301 USA
24 */
25
26 #include "crud_cmd_handler.h"
27 #include "admin_cmd_handler.h"
28
29 #include "xpl_log.h"
30 #include "ngs/mysqlx/getter_any.h"
31 #include "expr_generator.h"
32 #include "sql_data_context.h"
33 #include "xpl_server.h"
34 #include "xpl_session.h"
35 #include "xpl_dispatcher.h"
36 #include "xpl_error.h"
37 #include "ngs_common/protocol_protobuf.h"
38 #include "notices.h"
39 #include "expect.h"
40
41
42 namespace
43 {
44
45 class Stmt
46 {
47 public:
execute(xpl::Sql_data_context & da,ngs::Protocol_encoder & proto,const bool show_warnings,const bool compact_metadata,const std::string & query,const::google::protobuf::RepeatedPtrField<::Mysqlx::Datatypes::Any> & args)48 ngs::Error_code execute(xpl::Sql_data_context &da, ngs::Protocol_encoder &proto, const bool show_warnings,
49 const bool compact_metadata, const std::string &query,
50 const ::google::protobuf::RepeatedPtrField< ::Mysqlx::Datatypes::Any > &args)
51 {
52 const int args_size = args.size();
53
54 if (0 == args_size)
55 return execute(da, proto, show_warnings, compact_metadata, query.data(), query.length());
56
57 m_qb.clear();
58 m_qb.put(query);
59
60 try
61 {
62 for (int i = 0; i < args_size; ++i)
63 {
64 ngs::Getter_any::put_scalar_value_to_functor(args.Get(i), *this);
65 }
66 }
67 catch (const ngs::Error_code &error)
68 {
69 return error;
70 }
71
72 return execute(da, proto, show_warnings, compact_metadata, m_qb.get().data(), m_qb.get().length());
73 }
74
execute(xpl::Sql_data_context & da,ngs::Protocol_encoder & proto,const bool show_warnings,const bool compact_metadata,const char * query,std::size_t query_len)75 ngs::Error_code execute(xpl::Sql_data_context &da, ngs::Protocol_encoder &proto, const bool show_warnings, const bool compact_metadata,
76 const char* query, std::size_t query_len)
77 {
78 xpl::Sql_data_context::Result_info info;
79 ngs::Error_code error = da.execute_sql_and_stream_results(query, query_len, compact_metadata, info);
80
81 if (!error)
82 {
83 if (info.num_warnings > 0 && show_warnings)
84 xpl::notices::send_warnings(da, proto);
85 xpl::notices::send_rows_affected(proto, info.affected_rows);
86 if (info.last_insert_id > 0)
87 xpl::notices::send_generated_insert_id(proto, info.last_insert_id);
88 if (!info.message.empty())
89 xpl::notices::send_message(proto, info.message);
90 proto.send_exec_ok();
91 }
92 else
93 {
94 if (show_warnings)
95 xpl::notices::send_warnings(da, proto, true);
96 }
97
98 return error;
99 }
100
operator ()()101 void operator() ()
102 {
103 static const char *value_null = "NULL";
104
105 m_qb.format() % xpl::Query_formatter::No_escape<const char*>(value_null);
106 }
107
108 template <typename Value_type>
operator ()(const Value_type & value)109 void operator() (const Value_type &value)
110 {
111 m_qb.format() % value;
112 }
113
114 private:
115 xpl::Query_string_builder m_qb;
116 };
117
118
on_stmt_execute(xpl::Session & session,const Mysqlx::Sql::StmtExecute & msg)119 ngs::Error_code on_stmt_execute(xpl::Session &session, const Mysqlx::Sql::StmtExecute &msg)
120 {
121 log_debug("%s: %s", session.client().client_id(), msg.stmt().c_str());
122
123 if (msg.namespace_() == "sql" || !msg.has_namespace_())
124 {
125 session.update_status<&xpl::Common_status_variables::m_stmt_execute_sql>();
126 return Stmt().execute(session.data_context(), session.proto(), session.options().get_send_warnings(),
127 msg.compact_metadata(), msg.stmt(), msg.args());
128 }
129
130 if (msg.namespace_() == "xplugin")
131 {
132 session.update_status<&xpl::Common_status_variables::m_stmt_execute_xplugin>();
133 if (session.options().get_send_xplugin_deprecation())
134 {
135 xpl::notices::send_message(session.proto(), "Namespace 'xplugin' is deprecated, please use 'mysqlx' instead");
136 session.options().set_send_xplugin_deprecation(false);
137 }
138 xpl::Admin_command_arguments_list args(msg.args());
139 return xpl::Admin_command_handler(session).execute(msg.namespace_(), msg.stmt(), args);
140 }
141
142 if (msg.namespace_() == "mysqlx")
143 {
144 session.update_status<&xpl::Common_status_variables::m_stmt_execute_mysqlx>();
145 xpl::Admin_command_arguments_object args(msg.args());
146 return xpl::Admin_command_handler(session).execute(msg.namespace_(), msg.stmt(), args);
147 }
148
149 return ngs::Error(ER_X_INVALID_NAMESPACE, "Unknown namespace %s", msg.namespace_().c_str());
150 }
151
152
on_expect_open(xpl::Session & session,xpl::Expectation_stack & expect,const Mysqlx::Expect::Open & msg)153 ngs::Error_code on_expect_open(xpl::Session &session, xpl::Expectation_stack &expect, const Mysqlx::Expect::Open &msg)
154 {
155 session.update_status<&xpl::Common_status_variables::m_expect_open>();
156
157 ngs::Error_code error = expect.open(msg);
158 if (!error)
159 session.proto().send_ok();
160 return error;
161 }
162
163
on_expect_close(xpl::Session & session,xpl::Expectation_stack & expect,const Mysqlx::Expect::Close & msg)164 ngs::Error_code on_expect_close(xpl::Session &session, xpl::Expectation_stack &expect, const Mysqlx::Expect::Close &msg)
165 {
166 session.update_status<&xpl::Common_status_variables::m_expect_close>();
167
168 ngs::Error_code error = expect.close();
169 if (!error)
170 session.proto().send_ok();
171 return error;
172 }
173
174
do_dispatch_command(xpl::Session & session,xpl::Crud_command_handler & crudh,xpl::Expectation_stack & expect,ngs::Request & command)175 ngs::Error_code do_dispatch_command(xpl::Session &session, xpl::Crud_command_handler &crudh,
176 xpl::Expectation_stack &expect, ngs::Request &command)
177 {
178 switch (command.get_type())
179 {
180 case Mysqlx::ClientMessages::SQL_STMT_EXECUTE:
181 return on_stmt_execute(session, static_cast<const Mysqlx::Sql::StmtExecute&>(*command.message()));
182
183 case Mysqlx::ClientMessages::CRUD_FIND:
184 return crudh.execute_crud_find(session, static_cast<const Mysqlx::Crud::Find&>(*command.message()));
185
186 case Mysqlx::ClientMessages::CRUD_INSERT:
187 return crudh.execute_crud_insert(session, static_cast<const Mysqlx::Crud::Insert&>(*command.message()));
188
189 case Mysqlx::ClientMessages::CRUD_UPDATE:
190 return crudh.execute_crud_update(session, static_cast<const Mysqlx::Crud::Update&>(*command.message()));
191
192 case Mysqlx::ClientMessages::CRUD_DELETE:
193 return crudh.execute_crud_delete(session, static_cast<const Mysqlx::Crud::Delete&>(*command.message()));
194
195 case Mysqlx::ClientMessages::CRUD_CREATE_VIEW:
196 return crudh.execute_create_view(session, static_cast<const Mysqlx::Crud::CreateView&>(*command.message()));
197
198 case Mysqlx::ClientMessages::CRUD_MODIFY_VIEW:
199 return crudh.execute_modify_view(session, static_cast<const Mysqlx::Crud::ModifyView&>(*command.message()));
200
201 case Mysqlx::ClientMessages::CRUD_DROP_VIEW:
202 return crudh.execute_drop_view(session, static_cast<const Mysqlx::Crud::DropView&>(*command.message()));
203
204 case Mysqlx::ClientMessages::EXPECT_OPEN:
205 return on_expect_open(session, expect, static_cast<const Mysqlx::Expect::Open&>(*command.message()));
206
207 case Mysqlx::ClientMessages::EXPECT_CLOSE:
208 return on_expect_close(session, expect, static_cast<const Mysqlx::Expect::Close&>(*command.message()));
209 }
210
211 session.proto().get_protocol_monitor().on_error_unknown_msg_type();
212 return ngs::Error(ER_UNKNOWN_COM_ERROR, "Unexpected message received");
213 }
214
215 } // namespace
216
217
dispatch_command(Session & session,Crud_command_handler & crudh,Expectation_stack & expect,ngs::Request & command)218 bool xpl::dispatcher::dispatch_command(Session &session, Crud_command_handler &crudh,
219 Expectation_stack &expect, ngs::Request &command)
220 {
221 ngs::Error_code error = expect.pre_client_stmt(command.get_type());
222 if (!error)
223 {
224 error = do_dispatch_command(session, crudh, expect, command);
225 if (error)
226 session.proto().send_result(error);
227 expect.post_client_stmt(command.get_type(), error);
228 }
229 else
230 session.proto().send_result(error);
231 return error.error != ER_UNKNOWN_COM_ERROR;
232 }
233