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33 lines
1.5 KiB
33 lines
1.5 KiB
#include "db/db_impl.h"
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#include "leveldb/db.h"
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#include "leveldb/options.h"
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#include "leveldb/status.h"
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namespace leveldb{
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class FieldDB:leveldb::DB {
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public:
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/*lab1的要求*/
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Status Put(const WriteOptions &options, const Slice &key, const Slice &value) override;
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Status PutFields(const WriteOptions &, const Slice &key, const FieldArray &fields) override;
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Status Delete(const WriteOptions &options, const Slice &key) override;
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Status Write(const WriteOptions &options, WriteBatch *updates) override;
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Status Get(const ReadOptions &options, const Slice &key, std::string *value) override;
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Status GetFields(const ReadOptions &options, const Slice &key, FieldArray *fields) override;
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std::vector<std::string> FindKeysByField(Field &field) override;
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Iterator * NewIterator(const ReadOptions &options) override;
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const Snapshot * GetSnapshot() override;
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void ReleaseSnapshot(const Snapshot *snapshot) override;
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bool GetProperty(const Slice &property, std::string *value) override;
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void GetApproximateSizes(const Range *range, int n, uint64_t *sizes) override;
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void CompactRange(const Slice *begin, const Slice *end) override;
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/*与索引相关*/
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bool CreateIndexOnField(const std::string& field_name);
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bool DeleteIndex(std::string &field_name);
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std::vector<std::string> QueryByIndex(Field &field);
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private:
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static Status OpenFieldDB(const Options& options,const std::string& name,DB** dbptr);
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leveldb::DBImpl *indexDB;
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leveldb::DBImpl *kvDB;
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};
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} // end of namespace
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