Struct Sbbf 

pub struct Sbbf(/* private fields */);

A split block Bloom filter.

The creation of this structure is based on the crate::file::properties::BloomFilterProperties struct set via crate::file::properties::WriterProperties and is thus hidden by default.

Implementations

impl Sbbf

pub fn write<W: Write>(&self, writer: W) -> Result<(), ParquetError>

Write the bloom filter data (header and then bitset) to the output. This doesn’t flush the writer in order to boost performance of bulk writing all blocks. Caller must remember to flush the writer. This method usually is used in conjunction with Self::from_bytes for serialization/deserialization.

pub fn read_from_column_chunk<R: ChunkReader>( column_metadata: &ColumnChunkMetaData, reader: &R, ) -> Result<Option<Self>, ParquetError>

Read a new bloom filter from the given offset in the given reader.

pub fn insert<T: AsBytes + ?Sized>(&mut self, value: &T)

Insert an AsBytes value into the filter

pub fn check<T: AsBytes>(&self, value: &T) -> bool

Check if an AsBytes value is probably present or definitely absent in the filter

pub fn from_bytes(bytes: &[u8]) -> Result<Self, ParquetError>

Reads a Sbff from Thrift encoded bytes

Examples

// In a real application, you would read serialized bloom filter bytes from a cache.
// This example demonstrates the deserialization process.
// Assuming you have bloom filter bytes from a Parquet file:
let bloom_filter = Sbbf::from_bytes(&serialized_bytes)?;
// Now you can use the bloom filter to check for values
if bloom_filter.check(&"some_value") {
    println!("Value might be present (or false positive)");
} else {
    println!("Value is definitely not present");
}

Trait Implementations

impl Clone for Sbbf

fn clone(&self) -> Sbbf

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Sbbf

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.