Struct SstFileWriter

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pub struct SstFileWriter<'a> { /* private fields */ }

Expand description

SstFileWriter is used to create sst files that can be added to database later All keys in files generated by SstFileWriter will have sequence number = 0.

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impl<'a> SstFileWriter<'a>

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pub fn create(opts: &'a Options) -> Self

Initializes SstFileWriter with given DB options.

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pub fn open<P: AsRef<Path>>(&'a self, path: P) -> Result<(), Error>

Prepare SstFileWriter to write into file located at “file_path”.

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pub fn finish(&mut self) -> Result<(), Error>

Finalize writing to sst file and close file.

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pub fn file_size(&self) -> u64

returns the current file size

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pub fn put<K, V>(&mut self, key: K, value: V) -> Result<(), Error>
where K: AsRef<[u8]>, V: AsRef<[u8]>,

Adds a Put key with value to currently opened file REQUIRES: key is after any previously added key according to comparator.

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pub fn put_with_ts<K, V, S>( &mut self, key: K, ts: S, value: V, ) -> Result<(), Error>
where K: AsRef<[u8]>, V: AsRef<[u8]>, S: AsRef<[u8]>,

Adds a Put key with value to currently opened file REQUIRES: key is after any previously added key according to comparator.

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pub fn merge<K, V>(&mut self, key: K, value: V) -> Result<(), Error>
where K: AsRef<[u8]>, V: AsRef<[u8]>,

Adds a Merge key with value to currently opened file REQUIRES: key is after any previously added key according to comparator.

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pub fn delete<K: AsRef<[u8]>>(&mut self, key: K) -> Result<(), Error>

Adds a deletion key to currently opened file REQUIRES: key is after any previously added key according to comparator.

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pub fn delete_range<K: AsRef<[u8]>>( &mut self, begin_key: K, end_key: K, ) -> Result<(), Error>

Adds a range deletion tombstone to the currently opened file. Unlike point entries, range tombstones may be added out of order. REQUIRES: begin_key <= end_key according to the comparator. REQUIRES: comparator is not timestamp-aware.

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