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2021-05-31 22:56:52 +08:00
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src/storage/ob_range_skip.cpp Normal file
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/**
* Copyright (c) 2021 OceanBase
* OceanBase CE 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.
*/
#include "ob_range_skip.h"
#include "storage/memtable/ob_memtable_iterator.h"
#include "storage/memtable/mvcc/ob_query_engine.h"
namespace oceanbase {
namespace storage {
int ObRangeSkip::inspect_gap(int idx, const bool is_memtable, uint8_t in_gap_flag, int64_t& range_idx,
const ObStoreRowkey*& rowkey, int64_t limit)
{
int ret = OB_SUCCESS;
bool in_gap = (in_gap_flag & STORE_ITER_ROW_IN_GAP);
bool big_gap_hint = (in_gap_flag & STORE_ITER_ROW_BIG_GAP_HINT);
int64_t gap_size = 0;
if (!in_gap) {
ret = OB_ENTRY_NOT_EXIST;
} else if (!big_gap_hint) {
ret = OB_ENTRY_NOT_EXIST;
} else {
ObStoreRowIterator* iter = (typeof(iter))(*iters_)[idx];
if (OB_FAIL(iter->get_gap_end(range_idx, rowkey, gap_size))) {
STORAGE_LOG(WARN, "RangeSkip: fail", K(ret));
} else if (gap_size < limit) {
STORAGE_LOG(TRACE, "RangeSkip: gap_size too small", K(is_memtable), K(*rowkey), K(gap_size), K(idx));
ret = OB_ENTRY_NOT_EXIST;
if (is_memtable) {
EVENT_INC(MEMSTORE_SMALL_GAP_COUNT);
EVENT_ADD(MEMSTORE_SMALL_GAP_ROW_COUNT, gap_size);
} else {
EVENT_INC(SSSTORE_SMALL_GAP_COUNT);
EVENT_ADD(SSSTORE_SMALL_GAP_ROW_COUNT, gap_size);
}
} else {
STORAGE_LOG(TRACE, "RangeSkip: skip range", K(idx), K(is_memtable), K(range_idx), K(*rowkey), K(gap_size));
if (is_memtable) {
EVENT_INC(MEMSTORE_BIG_GAP_COUNT);
EVENT_ADD(MEMSTORE_BIG_GAP_ROW_COUNT, gap_size);
} else {
EVENT_INC(SSSTORE_BIG_GAP_COUNT);
EVENT_ADD(SSSTORE_BIG_GAP_ROW_COUNT, gap_size);
}
}
}
return ret;
}
}; // end namespace storage
}; // end namespace oceanbase