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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:54:28 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:54:28 +0000 |
commit | e6918187568dbd01842d8d1d2c808ce16a894239 (patch) | |
tree | 64f88b554b444a49f656b6c656111a145cbbaa28 /src/rocksdb/examples/column_families_example.cc | |
parent | Initial commit. (diff) | |
download | ceph-e6918187568dbd01842d8d1d2c808ce16a894239.tar.xz ceph-e6918187568dbd01842d8d1d2c808ce16a894239.zip |
Adding upstream version 18.2.2.upstream/18.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/rocksdb/examples/column_families_example.cc | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/rocksdb/examples/column_families_example.cc b/src/rocksdb/examples/column_families_example.cc new file mode 100644 index 000000000..3828d3fb3 --- /dev/null +++ b/src/rocksdb/examples/column_families_example.cc @@ -0,0 +1,88 @@ +// Copyright (c) 2011-present, Facebook, Inc. All rights reserved. +// This source code is licensed under both the GPLv2 (found in the +// COPYING file in the root directory) and Apache 2.0 License +// (found in the LICENSE.Apache file in the root directory). +#include <cstdio> +#include <string> +#include <vector> + +#include "rocksdb/db.h" +#include "rocksdb/options.h" +#include "rocksdb/slice.h" + +#if defined(OS_WIN) +std::string kDBPath = "C:\\Windows\\TEMP\\rocksdb_column_families_example"; +#else +std::string kDBPath = "/tmp/rocksdb_column_families_example"; +#endif + +using ROCKSDB_NAMESPACE::ColumnFamilyDescriptor; +using ROCKSDB_NAMESPACE::ColumnFamilyHandle; +using ROCKSDB_NAMESPACE::ColumnFamilyOptions; +using ROCKSDB_NAMESPACE::DB; +using ROCKSDB_NAMESPACE::DBOptions; +using ROCKSDB_NAMESPACE::Options; +using ROCKSDB_NAMESPACE::ReadOptions; +using ROCKSDB_NAMESPACE::Slice; +using ROCKSDB_NAMESPACE::Status; +using ROCKSDB_NAMESPACE::WriteBatch; +using ROCKSDB_NAMESPACE::WriteOptions; + +int main() { + // open DB + Options options; + options.create_if_missing = true; + DB* db; + Status s = DB::Open(options, kDBPath, &db); + assert(s.ok()); + + // create column family + ColumnFamilyHandle* cf; + s = db->CreateColumnFamily(ColumnFamilyOptions(), "new_cf", &cf); + assert(s.ok()); + + // close DB + s = db->DestroyColumnFamilyHandle(cf); + assert(s.ok()); + delete db; + + // open DB with two column families + std::vector<ColumnFamilyDescriptor> column_families; + // have to open default column family + column_families.push_back(ColumnFamilyDescriptor( + ROCKSDB_NAMESPACE::kDefaultColumnFamilyName, ColumnFamilyOptions())); + // open the new one, too + column_families.push_back( + ColumnFamilyDescriptor("new_cf", ColumnFamilyOptions())); + std::vector<ColumnFamilyHandle*> handles; + s = DB::Open(DBOptions(), kDBPath, column_families, &handles, &db); + assert(s.ok()); + + // put and get from non-default column family + s = db->Put(WriteOptions(), handles[1], Slice("key"), Slice("value")); + assert(s.ok()); + std::string value; + s = db->Get(ReadOptions(), handles[1], Slice("key"), &value); + assert(s.ok()); + + // atomic write + WriteBatch batch; + batch.Put(handles[0], Slice("key2"), Slice("value2")); + batch.Put(handles[1], Slice("key3"), Slice("value3")); + batch.Delete(handles[0], Slice("key")); + s = db->Write(WriteOptions(), &batch); + assert(s.ok()); + + // drop column family + s = db->DropColumnFamily(handles[1]); + assert(s.ok()); + + // close db + for (auto handle : handles) { + s = db->DestroyColumnFamilyHandle(handle); + assert(s.ok()); + } + delete db; + + return 0; +} |