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Andrey Zagrebin 6a5e8486b6 Summary: 
This PR addresses issue #3865 and implements the following approach to fix it:
 - adds `MergeContext::GetOperandsDirectionForward` and `MergeContext::GetOperandsDirectionBackward` to query merge operands in a specific order
 - `MergeContext::GetOperands` becomes a shortcut for `MergeContext::GetOperandsDirectionForward`
 - pass `MergeContext::GetOperandsDirectionBackward` to `MergeOperator::ShouldMerge` and document the order
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4266

Differential Revision: D9360750

Pulled By: sagar0

fbshipit-source-id: 20cb73ff017760b062ecdcf4382560767086e092
2018-08-21 16:53:02 -07:00
..
builder.cc
Support for Column family specific paths.
2018-04-05 19:58:20 -07:00
builder.h
Stream
2017-11-10 09:26:24 -08:00
c_test.c
comment unused parameters to turn on -Wunused-parameter flag
2018-04-12 17:59:16 -07:00
c.cc
expose WAL iterator in the C API
2018-04-27 16:56:59 -07:00
column_family_test.cc
Fix segfault caused by object premature destruction
2018-05-25 15:12:29 -07:00
column_family.cc
Skip deleted WALs during recovery
2018-05-03 15:43:09 -07:00
column_family.h
Add max_subcompactions as a compaction option
2018-04-27 11:57:39 -07:00
compact_files_test.cc
fix memory leak in two_level_iterator
2018-04-15 17:26:26 -07:00
compacted_db_impl.cc
Fix coverity issues column_family, compaction_db/iterator
2017-10-27 11:26:42 -07:00
compacted_db_impl.h
Comment out unused variables
2018-03-05 13:13:41 -08:00
compaction_iteration_stats.h
add counter for deletion dropping optimization
2017-08-19 14:10:08 -07:00
compaction_iterator_test.cc
Comment out unused variables
2018-03-05 13:13:41 -08:00
compaction_iterator.cc
Blob DB: Improve FIFO eviction
2018-03-06 11:57:42 -08:00
compaction_iterator.h
Comment out unused variables
2018-03-05 13:13:41 -08:00
compaction_job_stats_test.cc
fix memory leak in two_level_iterator
2018-04-15 17:26:26 -07:00
compaction_job_test.cc
Add max_subcompactions as a compaction option
2018-04-27 11:57:39 -07:00
compaction_job.cc
MaxFileSizeForLevel: adjust max_file_size for dynamic level compaction
2018-05-03 16:42:13 -07:00
compaction_job.h
MaxFileSizeForLevel: adjust max_file_size for dynamic level compaction
2018-05-03 16:42:13 -07:00
compaction_picker_test.cc
Support for Column family specific paths.
2018-04-05 19:58:20 -07:00
compaction_picker_universal.cc
MaxFileSizeForLevel: adjust max_file_size for dynamic level compaction
2018-05-03 16:42:13 -07:00
compaction_picker_universal.h
Make Universal compaction options dynamic
2017-12-11 13:27:06 -08:00
compaction_picker.cc
Fix formatting in log message
2018-05-11 11:28:54 -07:00
compaction_picker.h
Add max_subcompactions as a compaction option
2018-04-27 11:57:39 -07:00
compaction.cc
MaxFileSizeForLevel: adjust max_file_size for dynamic level compaction
2018-05-03 16:42:13 -07:00
compaction.h
MaxFileSizeForLevel: adjust max_file_size for dynamic level compaction
2018-05-03 16:42:13 -07:00
comparator_db_test.cc
Comment out unused variables
2018-03-05 13:13:41 -08:00
convenience.cc
Delete files in multiple ranges at once
2018-01-30 13:56:39 -08:00
corruption_test.cc
Change and clarify the relationship between Valid(), status() and Seek*() for all iterators. Also fix some bugs
2018-05-17 02:56:56 -07:00
cuckoo_table_db_test.cc
fix memory leak in two_level_iterator
2018-04-15 17:26:26 -07:00
db_basic_test.cc
Disallow compactions if there isn't enough free space
2018-03-06 16:27:54 -08:00
db_blob_index_test.cc
fix lite build
2017-10-17 08:57:09 -07:00
db_block_cache_test.cc
avoid double delete on dummy record insertion failure
2018-05-01 16:01:28 -07:00
db_bloom_filter_test.cc
comment unused parameters to turn on -Wunused-parameter flag
2018-04-12 17:59:16 -07:00
db_compaction_filter_test.cc
fix wrong length in snprintf
2018-03-16 13:27:55 -07:00
db_compaction_test.cc
Bottommost level-based compactions in bottom-pri pool
2018-05-14 14:57:15 -07:00
db_dynamic_level_test.cc
fix memory leak in two_level_iterator
2018-04-15 17:26:26 -07:00
db_encryption_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
db_filesnapshot.cc
fix behavior does not match name for "IsFileDeletionsEnabled"
2018-03-21 22:13:34 -07:00
db_flush_test.cc
Skip deleted WALs during recovery
2018-05-03 15:43:09 -07:00
db_impl_compaction_flush.cc
Bottommost level-based compactions in bottom-pri pool
2018-05-14 14:57:15 -07:00
db_impl_debug.cc
Pass manual_wal_flush also to the first wal file
2018-05-14 10:57:56 -07:00
db_impl_experimental.cc
Inform caller when rocksdb is stalling writes
2017-10-05 18:11:43 -07:00
db_impl_files.cc
DBImpl::FindObsoleteFiles() not to call GetChildren() on the same path
2018-08-21 14:37:05 -07:00
db_impl_open.cc
Pass manual_wal_flush also to the first wal file
2018-05-14 10:57:56 -07:00
db_impl_readonly.cc
comment unused parameters to turn on -Wunused-parameter flag
2018-04-12 17:59:16 -07:00
db_impl_readonly.h
allowing CompactFiles to return new file names
2018-03-15 11:58:12 -07:00
db_impl_write.cc
Skip deleted WALs during recovery
2018-05-03 15:43:09 -07:00
db_impl.cc
Fix race condition between log_.erase and log_.back
2018-05-16 13:01:33 -07:00
db_impl.h
Pass manual_wal_flush also to the first wal file
2018-05-14 10:57:56 -07:00
db_info_dumper.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
db_info_dumper.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
db_inplace_update_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
db_io_failure_test.cc
Fix LITE unit tests
2017-07-26 21:11:47 -07:00
db_iter_stress_test.cc
Change and clarify the relationship between Valid(), status() and Seek*() for all iterators. Also fix some bugs
2018-05-17 02:56:56 -07:00
db_iter_test.cc
Fix regression bug of Prev() with upper bound (#3989)
2018-06-12 17:03:28 -07:00
db_iter.cc
Change and clarify the relationship between Valid(), status() and Seek*() for all iterators. Also fix some bugs
2018-05-17 02:56:56 -07:00
db_iter.h
WritePrepared Txn: Return NotSupported on iterator refresh
2017-12-18 22:29:30 -08:00
db_iterator_test.cc
Fix regression bug of Prev() with upper bound (#3989)
2018-06-12 17:03:28 -07:00
db_log_iter_test.cc
fix memory leak in two_level_iterator
2018-04-15 17:26:26 -07:00
db_memtable_test.cc
Comment out unused variables
2018-03-05 13:13:41 -08:00
db_merge_operator_test.cc
Fix TSAN timeout in MergeOperatorPinningTest.Randomized/x test
2018-03-02 16:27:21 -08:00
db_options_test.cc
comment unused parameters to turn on -Wunused-parameter flag
2018-04-12 17:59:16 -07:00
db_properties_test.cc
Add block cache related DB properties
2018-04-18 21:42:25 -07:00
db_range_del_test.cc
Add max_subcompactions as a compaction option
2018-04-27 11:57:39 -07:00
db_sst_test.cc
comment unused parameters to turn on -Wunused-parameter flag
2018-04-12 17:59:16 -07:00
db_statistics_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
db_table_properties_test.cc
fix deletion-triggered compaction in table builder
2017-09-28 18:17:30 -07:00
db_tailing_iter_test.cc
fix memory leak in two_level_iterator
2018-04-15 17:26:26 -07:00
db_test2.cc
Apply use_direct_io_for_flush_and_compaction to writes only
2018-05-09 19:42:58 -07:00
db_test_util.cc
Support for Column family specific paths.
2018-04-05 19:58:20 -07:00
db_test_util.h
Skip deleted WALs during recovery
2018-05-03 15:43:09 -07:00
db_test.cc
Introduce and use the option to disable stall notifications structures
2018-05-09 10:13:53 -07:00
db_universal_compaction_test.cc
Bottommost level-based compactions in bottom-pri pool
2018-05-14 14:57:15 -07:00
db_wal_test.cc
Skip deleted WALs during recovery
2018-05-03 15:43:09 -07:00
db_write_test.cc
Suppress tsan lock-order-inversion on FlushWAL
2018-05-14 21:13:35 -07:00
dbformat_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
dbformat.cc
add kEntryRangeDeletion
2018-04-13 11:27:17 -07:00
dbformat.h
Imporve perf of random read and insert compare by suggesting inlining to the compiler
2018-03-23 13:26:55 -07:00
deletefile_test.cc
fix memory leak in two_level_iterator
2018-04-15 17:26:26 -07:00
event_helpers.cc
comment unused parameters to turn on -Wunused-parameter flag
2018-04-12 17:59:16 -07:00
event_helpers.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
experimental.cc
comment unused parameters to turn on -Wunused-parameter flag
2018-04-12 17:59:16 -07:00
external_sst_file_basic_test.cc
optimize file ingestion checks for range deletion overlap
2017-11-28 11:27:02 -08:00
external_sst_file_ingestion_job.cc
Improve accuracy of I/O stats collection of external SST ingestion.
2018-04-13 10:58:42 -07:00
external_sst_file_ingestion_job.h
Initialize a boolean member variable of a struct.
2018-04-16 14:28:01 -07:00
external_sst_file_test.cc
Skip deleted WALs during recovery
2018-05-03 15:43:09 -07:00
fault_injection_test.cc
Split FaultInjectionTest.FaultTest to avoid timeout
2018-05-07 12:29:58 -07:00
file_indexer_test.cc
Comment out unused variables
2018-03-05 13:13:41 -08:00
file_indexer.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
file_indexer.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
filename_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
flush_job_test.cc
Skip deleted WALs during recovery
2018-05-03 15:43:09 -07:00
flush_job.cc
Skip deleted WALs during recovery
2018-05-03 15:43:09 -07:00
flush_job.h
Skip deleted WALs during recovery
2018-05-03 15:43:09 -07:00
flush_scheduler.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
flush_scheduler.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
forward_iterator_bench.cc
fix gflags namespace
2017-12-01 10:42:05 -08:00
forward_iterator.cc
Change and clarify the relationship between Valid(), status() and Seek*() for all iterators. Also fix some bugs
2018-05-17 02:56:56 -07:00
forward_iterator.h
Comment out unused variables
2018-03-05 13:13:41 -08:00
internal_stats.cc
Rename vars to satisfy unity built
2018-05-04 15:28:06 -07:00
internal_stats.h
Skip deleted WALs during recovery
2018-05-03 15:43:09 -07:00
job_context.h
Introduce and use the option to disable stall notifications structures
2018-05-09 10:13:53 -07:00
listener_test.cc
fix some text in comments.
2018-04-10 15:59:24 -07:00
log_format.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
log_reader.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
log_reader.h
Suppress lint in old files
2018-01-29 12:56:42 -08:00
log_test.cc
Use nullptr instead of NULL / 0 more consistently.
2018-03-07 12:42:12 -08:00
log_writer.cc
Pass manual_wal_flush also to the first wal file
2018-05-14 10:57:56 -07:00
log_writer.h
Pass manual_wal_flush also to the first wal file
2018-05-14 10:57:56 -07:00
logs_with_prep_tracker.cc
Skip deleted WALs during recovery
2018-05-03 15:43:09 -07:00
logs_with_prep_tracker.h
Skip deleted WALs during recovery
2018-05-03 15:43:09 -07:00
malloc_stats.cc
Disallow compactions if there isn't enough free space
2018-03-06 16:27:54 -08:00
malloc_stats.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
managed_iterator.cc
Change and clarify the relationship between Valid(), status() and Seek*() for all iterators. Also fix some bugs
2018-05-17 02:56:56 -07:00
managed_iterator.h
Change and clarify the relationship between Valid(), status() and Seek*() for all iterators. Also fix some bugs
2018-05-17 02:56:56 -07:00
manual_compaction_test.cc
Speedup ManualCompactionTest.Test
2018-05-03 16:13:09 -07:00
memtable_list_test.cc
Skip deleted WALs during recovery
2018-05-03 15:43:09 -07:00
memtable_list.cc
Skip deleted WALs during recovery
2018-05-03 15:43:09 -07:00
memtable_list.h
Skip deleted WALs during recovery
2018-05-03 15:43:09 -07:00
memtable.cc
Summary:
2018-08-21 16:53:02 -07:00
memtable.h
InlineSkiplist: don't decode keys unnecessarily during comparisons
2018-03-23 12:14:30 -07:00
merge_context.h
Summary:
2018-08-21 16:53:02 -07:00
merge_helper_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
merge_helper.cc
WritePrepared Txn: Support merge operator
2018-02-09 14:57:54 -08:00
merge_helper.h
WritePrepared Txn: Support merge operator
2018-02-09 14:57:54 -08:00
merge_operator.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
merge_test.cc
Comment out unused variables
2018-03-05 13:13:41 -08:00
obsolete_files_test.cc
fix memory leak in two_level_iterator
2018-04-15 17:26:26 -07:00
options_file_test.cc
fix memory leak in two_level_iterator
2018-04-15 17:26:26 -07:00
perf_context_test.cc
Improve write time breakdown stats
2018-04-23 17:58:54 -07:00
pinned_iterators_manager.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
plain_table_db_test.cc
fix memory leak in two_level_iterator
2018-04-15 17:26:26 -07:00
pre_release_callback.h
Fix pre_release callback argument list.
2018-04-05 11:12:16 -07:00
prefix_test.cc
fix memory leak in two_level_iterator
2018-04-15 17:26:26 -07:00
range_del_aggregator_test.cc
optimize file ingestion checks for range deletion overlap
2017-11-28 11:27:02 -08:00
range_del_aggregator.cc
Recommit "Avoid adding tombstones of the same file to RangeDelAggregator multiple times"
2018-05-04 16:45:15 -07:00
range_del_aggregator.h
Recommit "Avoid adding tombstones of the same file to RangeDelAggregator multiple times"
2018-05-04 16:45:15 -07:00
read_callback.h
write-prepared txn: call IsInSnapshot
2017-09-11 09:14:48 -07:00
repair_test.cc
fix memory leak in two_level_iterator
2018-04-15 17:26:26 -07:00
repair.cc
Fix formatting in log message
2018-05-11 11:28:54 -07:00
snapshot_checker.h
Comment out unused variables
2018-03-05 13:13:41 -08:00
snapshot_impl.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
snapshot_impl.h
WritePrepared Txn: smallest_prepare optimization
2018-04-02 20:27:41 -07:00
table_cache.cc
Disable readahead when using mmap for reads
2018-05-08 12:13:18 -07:00
table_cache.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
table_properties_collector_test.cc
Comment out unused variables
2018-03-05 13:13:41 -08:00
table_properties_collector.cc
Comment out unused variables
2018-03-05 13:13:41 -08:00
table_properties_collector.h
Comment out unused variables
2018-03-05 13:13:41 -08:00
transaction_log_impl.cc
Comment out unused variables
2018-03-05 13:13:41 -08:00
transaction_log_impl.h
WritePrepared Txn: Refactor conf params
2017-11-10 17:28:12 -08:00
version_builder_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
version_builder.cc
Fix some typos in comments and docs.
2018-03-08 10:27:25 -08:00
version_builder.h
Allow DB reopen with reduced options.num_levels
2017-08-24 16:10:54 -07:00
version_edit_test.cc
Skip deleted WALs during recovery
2018-05-03 15:43:09 -07:00
version_edit.cc
Skip deleted WALs during recovery
2018-05-03 15:43:09 -07:00
version_edit.h
Skip deleted WALs during recovery
2018-05-03 15:43:09 -07:00
version_set_test.cc
Comment out unused variables
2018-03-05 13:13:41 -08:00
version_set.cc
Change and clarify the relationship between Valid(), status() and Seek*() for all iterators. Also fix some bugs
2018-05-17 02:56:56 -07:00
version_set.h
Skip deleted WALs during recovery
2018-05-03 15:43:09 -07:00
wal_manager_test.cc
fix memory leak in two_level_iterator
2018-04-15 17:26:26 -07:00
wal_manager.cc
Fix memleak when DB::DeleteFile()
2018-01-11 18:57:33 -08:00
wal_manager.h
Fix memleak when DB::DeleteFile()
2018-01-11 18:57:33 -08:00
write_batch_base.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
write_batch_internal.h
Fix some typos in comments and docs.
2018-03-08 10:27:25 -08:00
write_batch_test.cc
Comment out unused variables
2018-03-05 13:13:41 -08:00
write_batch.cc
WritePrepared Txn: enable TryAgain for duplicates at the end of the batch
2018-04-20 15:28:19 -07:00
write_callback_test.cc
fix memory leak in two_level_iterator
2018-04-15 17:26:26 -07:00
write_callback.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
write_controller_test.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
write_controller.cc
Change RocksDB License
2017-07-15 16:11:23 -07:00
write_controller.h
Change RocksDB License
2017-07-15 16:11:23 -07:00
write_thread.cc
Improve write time breakdown stats
2018-04-23 17:58:54 -07:00
write_thread.h
WritePrepared Txn: Duplicate Keys, Txn Part
2018-02-05 18:43:24 -08:00