FilterBuilder

risingwave_storage::hummock::sstable

Trait FilterBuilder 

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pub trait FilterBuilder: Send {
    // Required methods
    fn add_key(&mut self, dist_key: &[u8], table_id: u32);
    fn finish(&mut self, memory_limiter: Option<Arc<MemoryLimiter>>) -> Vec<u8> ⓘ;
    fn approximate_len(&self) -> usize;
    fn create(fpr: f64, capacity: usize) -> Self;
    fn approximate_building_memory(&self) -> usize;

    // Provided methods
    fn switch_block(&mut self, _memory_limiter: Option<Arc<MemoryLimiter>>) { ... }
    fn add_raw_data(&mut self, _raw: Vec<u8>) { ... }
    fn support_blocked_raw_data(&self) -> bool { ... }
}

Required Methods§

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fn add_key(&mut self, dist_key: &[u8], table_id: u32)

add key which need to be filter for construct filter data.

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fn finish(&mut self, memory_limiter: Option<Arc<MemoryLimiter>>) -> Vec<u8> ⓘ

Builds Bloom filter from key hashes

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fn approximate_len(&self) -> usize

approximate memory of filter builder

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fn create(fpr: f64, capacity: usize) -> Self

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fn approximate_building_memory(&self) -> usize

approximate memory when finish filter

Provided Methods§

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fn switch_block(&mut self, _memory_limiter: Option<Arc<MemoryLimiter>>)

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fn add_raw_data(&mut self, _raw: Vec<u8>)

Add raw data which build by keys directly. Please make sure that you have finished the last block by calling switch_block

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fn support_blocked_raw_data(&self) -> bool

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors§