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78 lines
1.9 KiB
C++
78 lines
1.9 KiB
C++
/* Copyright (c) 2018 BlackBerry Limited
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License. */
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#include <Parsers/ASTLiteral.h>
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#include <Parsers/ASTIdentifier.h>
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#include <Parsers/ASTWatchQuery.h>
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#include <Parsers/CommonParsers.h>
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#include <Parsers/ParserWatchQuery.h>
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#include <Parsers/ExpressionElementParsers.h>
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namespace DB
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{
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bool ParserWatchQuery::parseImpl(Pos & pos, ASTPtr & node, Expected & expected)
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{
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ParserKeyword s_watch("WATCH");
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ParserToken s_dot(TokenType::Dot);
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ParserIdentifier name_p;
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ParserKeyword s_events("EVENTS");
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ParserKeyword s_limit("LIMIT");
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ASTPtr database;
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ASTPtr table;
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auto query = std::make_shared<ASTWatchQuery>();
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if (!s_watch.ignore(pos, expected))
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{
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return false;
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}
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if (!name_p.parse(pos, table, expected))
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return false;
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if (s_dot.ignore(pos, expected))
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{
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database = table;
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if (!name_p.parse(pos, table, expected))
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return false;
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}
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/// EVENTS
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if (s_events.ignore(pos, expected))
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{
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query->is_watch_events = true;
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}
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/// LIMIT length
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if (s_limit.ignore(pos, expected))
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{
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ParserNumber num;
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if (!num.parse(pos, query->limit_length, expected))
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return false;
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}
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if (database)
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query->database = getIdentifierName(database);
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if (table)
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query->table = getIdentifierName(table);
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node = query;
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return true;
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}
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}
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