mirror of https://gitee.com/bigwinds/arangodb
60 lines
1.7 KiB
C++
60 lines
1.7 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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///
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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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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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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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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Jan Steemann
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGOD_AQL_COLLECTION_SCANNER_H
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#define ARANGOD_AQL_COLLECTION_SCANNER_H 1
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#include "Basics/Common.h"
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#include "Indexes/IndexElement.h"
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namespace arangodb {
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class ManagedDocumentResult;
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struct OperationCursor;
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class Transaction;
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namespace aql {
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class CollectionScanner {
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public:
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CollectionScanner(arangodb::Transaction*, ManagedDocumentResult*, std::string const&, bool);
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~CollectionScanner();
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void scan(std::vector<IndexLookupResult>& result, size_t batchSize);
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void reset();
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/// @brief forwards the cursor n elements. Does not read the data.
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/// Will at most forward to the last element.
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/// In the second parameter we add how many elements are
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/// really skipped
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int forward(size_t, uint64_t&);
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private:
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std::unique_ptr<OperationCursor> _cursor;
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};
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}
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}
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#endif
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