107 lines
4.2 KiB
C++
107 lines
4.2 KiB
C++
// Copyright (c) 2021 OceanBase
|
|
// OceanBase is licensed under Mulan PubL v2.
|
|
// You can use this software according to the terms and conditions of the Mulan PubL v2.
|
|
// You may obtain a copy of Mulan PubL v2 at:
|
|
// http://license.coscl.org.cn/MulanPubL-2.0
|
|
// THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
|
|
// EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
|
|
// MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
|
|
// See the Mulan PubL v2 for more details.
|
|
|
|
#ifndef OCEANBASE_STORAGE_MULTIPLE_SKIP_SCAN_MERGE_
|
|
#define OCEANBASE_STORAGE_MULTIPLE_SKIP_SCAN_MERGE_
|
|
|
|
#include "ob_multiple_scan_merge.h"
|
|
#include "storage/blocksstable/ob_datum_row.h"
|
|
|
|
namespace oceanbase
|
|
{
|
|
namespace storage
|
|
{
|
|
using namespace oceanbase::blocksstable;
|
|
|
|
class ObMultipleSkipScanMerge : public ObMultipleScanMerge
|
|
{
|
|
public:
|
|
ObMultipleSkipScanMerge();
|
|
virtual ~ObMultipleSkipScanMerge();
|
|
virtual int init(
|
|
ObTableAccessParam ¶m,
|
|
ObTableAccessContext &context,
|
|
ObGetTableParam &get_table_param) override;
|
|
virtual void reset() override;
|
|
virtual void reuse() override;
|
|
int open(const blocksstable::ObDatumRange &range) { return OB_NOT_SUPPORTED; }
|
|
int open(const blocksstable::ObDatumRange &range, const blocksstable::ObDatumRange &skip_scan_range);
|
|
protected:
|
|
virtual int inner_get_next_row(blocksstable::ObDatumRow &row) override;
|
|
virtual int inner_get_next_rows() override;
|
|
virtual int can_batch_scan(bool &can_batch) override;
|
|
private:
|
|
const static int32_t START_KEY_OFFSET_OF_SCAN_ROWKEY_RANGE = 0;
|
|
const static int32_t END_KEY_OFFSET_OF_SCAN_ROWKEY_RANGE = 1;
|
|
const static int32_t START_KEY_OFFSET_OF_SCAN_ROWS_RANGE = 2;
|
|
const static int32_t END_KEY_OFFSET_OF_SCAN_ROWS_RANGE = 3;
|
|
const static int32_t SKIP_SCAN_ROWKEY_DATUMS_ARRAY_CNT = 4;
|
|
const static int64_t SKIP_SCAN_CHECK_INTERRUPT_CNT = 100;
|
|
const static int64_t SKIP_SCAN_RETIRE_TO_NORMAL_SCAN_LIMIT = 1000;
|
|
int open_skip_scan(const blocksstable::ObDatumRange &range, const blocksstable::ObDatumRange &skip_scan_range);
|
|
int prepare_range(blocksstable::ObStorageDatum *datums, blocksstable::ObDatumRange &range);
|
|
void prepare_rowkey(blocksstable::ObStorageDatum *datums, const blocksstable::ObDatumRowkey &rowkey,
|
|
const int64_t datum_cnt, const bool is_min);
|
|
int update_scan_rowkey_range();
|
|
int update_scan_rows_range(blocksstable::ObDatumRow &row);
|
|
int shrink_scan_rows_range(bool &exceeded);
|
|
int prepare_scan_row_range();
|
|
void set_border_falg(const bool is_left, const blocksstable::ObDatumRange &src, blocksstable::ObDatumRange &dst);
|
|
OB_INLINE blocksstable::ObStorageDatum* start_key_of_scan_rowkey_range()
|
|
{ return datums_ + START_KEY_OFFSET_OF_SCAN_ROWKEY_RANGE * schema_rowkey_cnt_; }
|
|
OB_INLINE blocksstable::ObStorageDatum* end_key_of_scan_rowkey_range()
|
|
{ return datums_ + END_KEY_OFFSET_OF_SCAN_ROWKEY_RANGE * schema_rowkey_cnt_; }
|
|
OB_INLINE blocksstable::ObStorageDatum* start_key_of_scan_rows_range()
|
|
{ return datums_ + START_KEY_OFFSET_OF_SCAN_ROWS_RANGE * schema_rowkey_cnt_; }
|
|
OB_INLINE blocksstable::ObStorageDatum* end_key_of_scan_rows_range()
|
|
{ return datums_ + END_KEY_OFFSET_OF_SCAN_ROWS_RANGE * schema_rowkey_cnt_; }
|
|
OB_INLINE void reuse_datums()
|
|
{
|
|
if (OB_NOT_NULL(datums_)) {
|
|
for (int64_t i = 0; i < datums_cnt_; ++i) {
|
|
datums_[i].reuse();
|
|
}
|
|
}
|
|
}
|
|
OB_INLINE bool should_check_interrupt() const
|
|
{
|
|
return 0 == scan_rowkey_cnt_ % SKIP_SCAN_CHECK_INTERRUPT_CNT;
|
|
}
|
|
OB_INLINE bool should_retire_to_scan() const
|
|
{
|
|
return scan_rowkey_cnt_ > SKIP_SCAN_RETIRE_TO_NORMAL_SCAN_LIMIT;
|
|
}
|
|
|
|
enum SkipScanState {
|
|
SCAN_ROWKEY,
|
|
UPDATE_SCAN_ROWS_RANGE,
|
|
SCAN_ROWS,
|
|
UPDATE_SCAN_ROWKEY_RANGE,
|
|
SCAN_FINISHED,
|
|
RETIRED_TO_SCAN,
|
|
};
|
|
SkipScanState state_;
|
|
int64_t scan_rowkey_cnt_;
|
|
int64_t schema_rowkey_cnt_;
|
|
int64_t ss_rowkey_prefix_cnt_;
|
|
blocksstable::ObDatumRange scan_rowkey_range_;
|
|
blocksstable::ObDatumRange scan_rows_range_;
|
|
int64_t datums_cnt_;
|
|
blocksstable::ObStorageDatum *datums_;
|
|
const blocksstable::ObDatumRange *origin_range_;
|
|
const blocksstable::ObDatumRange *skip_scan_range_;
|
|
common::ObArenaAllocator range_allocator_;
|
|
common::ObArenaAllocator rowkey_allocator_;
|
|
};
|
|
|
|
}
|
|
}
|
|
|
|
#endif // OCEANBASE_STORAGE_MULTIPLE_SKIP_SCAN_MERGE_
|