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Yanqin Jin 7d26e4c5a3 Basic Support for Merge with user-defined timestamp (#10819) 
Summary:
This PR implements the originally disabled `Merge()` APIs when user-defined timestamp is enabled.

Simplest usage:
```cpp
// assume string append merge op is used with '.' as delimiter.
// ts1 < ts2
db->Put(WriteOptions(), "key", ts1, "v0");
db->Merge(WriteOptions(), "key", ts2, "1");
ReadOptions ro;
ro.timestamp = &ts2;
db->Get(ro, "key", &value);
ASSERT_EQ("v0.1", value);
```

Some code comments are added for clarity.

Note: support for timestamp in `DB::GetMergeOperands()` will be done in a follow-up PR.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/10819

Test Plan: make check

Reviewed By: ltamasi

Differential Revision: D40603195

Pulled By: riversand963

fbshipit-source-id: f96d6f183258f3392d80377025529f7660503013
 		2022-10-31 22:28:58 -07:00
..
agg_merge Print stack traces on frozen tests in CI (#10828) 2022-10-18 00:35:35 -07:00
backup Run clang-format on utilities/ (except utilities/transactions/) (#10853) 2022-10-24 16:38:09 -07:00
blob_db Run clang-format on utilities/ (except utilities/transactions/) (#10853) 2022-10-24 16:38:09 -07:00
cassandra Run clang-format on utilities/ (except utilities/transactions/) (#10853) 2022-10-24 16:38:09 -07:00
checkpoint Run clang-format on utilities/ (except utilities/transactions/) (#10853) 2022-10-24 16:38:09 -07:00
compaction_filters Run clang-format on utilities/ (except utilities/transactions/) (#10853) 2022-10-24 16:38:09 -07:00
convenience Run clang-format on utilities/ (except utilities/transactions/) (#10853) 2022-10-24 16:38:09 -07:00
leveldb_options Run clang-format on utilities/ (except utilities/transactions/) (#10853) 2022-10-24 16:38:09 -07:00
memory Print stack traces on frozen tests in CI (#10828) 2022-10-18 00:35:35 -07:00
merge_operators Run clang-format on utilities/ (except utilities/transactions/) (#10853) 2022-10-24 16:38:09 -07:00
option_change_migration Option migration tool to break down files for FIFO compaction (#10600) 2022-08-31 12:08:23 -07:00
options Run clang-format on utilities/ (except utilities/transactions/) (#10853) 2022-10-24 16:38:09 -07:00
persistent_cache Run clang-format on utilities/ (except utilities/transactions/) (#10853) 2022-10-24 16:38:09 -07:00
simulator_cache Refactor block cache tracing APIs (#10811) 2022-10-21 12:15:35 -07:00
table_properties_collectors Run clang-format on utilities/ (except utilities/transactions/) (#10853) 2022-10-24 16:38:09 -07:00
trace Add rate limiter priority to ReadOptions (#9424) 2022-02-16 23:18:14 -08:00
transactions Basic Support for Merge with user-defined timestamp (#10819) 2022-10-31 22:28:58 -07:00
ttl Run clang-format on utilities/ (except utilities/transactions/) (#10853) 2022-10-24 16:38:09 -07:00
write_batch_with_index Run clang-format on utilities/ (except utilities/transactions/) (#10853) 2022-10-24 16:38:09 -07:00
cache_dump_load.cc Introduce a mechanism to dump out blocks from block cache and re-insert to secondary cache (#8912) 2021-10-07 11:42:31 -07:00
cache_dump_load_impl.cc Run clang-format on utilities/ (except utilities/transactions/) (#10853) 2022-10-24 16:38:09 -07:00
cache_dump_load_impl.h Refactor to avoid confusing "raw block" (#10408) 2022-09-22 11:25:32 -07:00
compaction_filters.cc Restore Regex support for ObjectLibrary::Register, rename new APIs to allow old one to be deprecated in the future (#9362) 2022-01-11 06:33:48 -08:00
counted_fs.cc Fix serious FSDirectory use-after-Close bug (missing fsync) (#10460) 2022-08-02 10:54:32 -07:00
counted_fs.h Explicitly closing all directory file descriptors (#10049) 2022-06-01 18:03:34 -07:00
debug.cc Skip swaths of range tombstone covered keys in merging iterator (2022 edition) (#10449) 2022-09-02 09:51:19 -07:00
env_mirror.cc Fix clang13 build error (#9374) 2022-01-11 10:36:22 -08:00
env_mirror_test.cc Run clang-format on utilities/ (except utilities/transactions/) (#10853) 2022-10-24 16:38:09 -07:00
env_timed.cc Make FileSystem a Customizable Class (#8649) 2021-11-02 09:07:11 -07:00
env_timed.h Make FileSystem a Customizable Class (#8649) 2021-11-02 09:07:11 -07:00
env_timed_test.cc Run clang-format on utilities/ (except utilities/transactions/) (#10853) 2022-10-24 16:38:09 -07:00
fault_injection_env.cc Explicitly closing all directory file descriptors (#10049) 2022-06-01 18:03:34 -07:00
fault_injection_env.h Run clang-format on utilities/ (except utilities/transactions/) (#10853) 2022-10-24 16:38:09 -07:00
fault_injection_fs.cc Run clang-format on utilities/ (except utilities/transactions/) (#10853) 2022-10-24 16:38:09 -07:00
fault_injection_fs.h Run clang-format on utilities/ (except utilities/transactions/) (#10853) 2022-10-24 16:38:09 -07:00
fault_injection_secondary_cache.cc Avoid recompressing cold block in CompressedSecondaryCache (#10527) 2022-09-07 19:00:27 -07:00
fault_injection_secondary_cache.h add SetCapacity and GetCapacity for secondary cache (#10712) 2022-09-29 19:15:04 -07:00
memory_allocators.h Make MemoryAllocator into a Customizable class (#8980) 2021-12-17 04:20:47 -08:00
merge_operators.cc Restore Regex support for ObjectLibrary::Register, rename new APIs to allow old one to be deprecated in the future (#9362) 2022-01-11 06:33:48 -08:00
merge_operators.h Run clang-format on utilities/ (except utilities/transactions/) (#10853) 2022-10-24 16:38:09 -07:00
object_registry.cc Added GetFactoryCount/Names/Types to ObjectRegistry (#9358) 2022-05-16 09:44:43 -07:00
object_registry_test.cc Print stack traces on frozen tests in CI (#10828) 2022-10-18 00:35:35 -07:00
util_merge_operators_test.cc Print stack traces on frozen tests in CI (#10828) 2022-10-18 00:35:35 -07:00
wal_filter.cc Make WalFilter, SstPartitionerFactory, FileChecksumGenFactory, and TableProperties Customizable (#8638) 2021-09-28 05:32:02 -07:00