1/* Copyright (c) 2018 BlackBerry Limited
2
3Licensed under the Apache License, Version 2.0 (the "License");
4you may not use this file except in compliance with the License.
5You may obtain a copy of the License at
6http://www.apache.org/licenses/LICENSE-2.0
7Unless required by applicable law or agreed to in writing, software
8distributed under the License is distributed on an "AS IS" BASIS,
9WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
10See the License for the specific language governing permissions and
11limitations under the License. */
12#pragma once
13
14#include <Parsers/ASTQueryWithTableAndOutput.h>
15#include <Common/quoteString.h>
16
17
18namespace DB
19{
20
21class ASTWatchQuery : public ASTQueryWithTableAndOutput
22{
23
24public:
25 ASTPtr limit_length;
26 bool is_watch_events;
27
28 ASTWatchQuery() = default;
29 String getID(char) const override { return "WatchQuery_" + database + "_" + table; }
30
31 ASTPtr clone() const override
32 {
33 std::shared_ptr<ASTWatchQuery> res = std::make_shared<ASTWatchQuery>(*this);
34 res->children.clear();
35 cloneOutputOptions(*res);
36 return res;
37 }
38
39protected:
40 void formatQueryImpl(const FormatSettings & s, FormatState & state, FormatStateStacked frame) const override
41 {
42 std::string indent_str = s.one_line ? "" : std::string(4 * frame.indent, ' ');
43
44 s.ostr << (s.hilite ? hilite_keyword : "") << "WATCH" << " " << (s.hilite ? hilite_none : "")
45 << (!database.empty() ? backQuoteIfNeed(database) + "." : "") << backQuoteIfNeed(table);
46
47 if (is_watch_events)
48 {
49 s.ostr << " " << (s.hilite ? hilite_keyword : "") << "EVENTS" << (s.hilite ? hilite_none : "");
50 }
51
52 if (limit_length)
53 {
54 s.ostr << (s.hilite ? hilite_keyword : "") << s.nl_or_ws << indent_str << "LIMIT " << (s.hilite ? hilite_none : "");
55 limit_length->formatImpl(s, state, frame);
56 }
57 }
58};
59
60}
61