Cloud Firestore V1 Client - Class BloomFilter (1.45.0)

Reference documentation and code samples for the Cloud Firestore V1 Client class BloomFilter.

A bloom filter (https://en.wikipedia.org/wiki/Bloom_filter).

The bloom filter hashes the entries with MD5 and treats the resulting 128-bit hash as 2 distinct 64-bit hash values, interpreted as unsigned integers using 2's complement encoding. These two hash values, named h1 and h2, are then used to compute the hash_count hash values using the formula, starting at i=0: h(i) = h1 + (i * h2) These resulting values are then taken modulo the number of bits in the bloom filter to get the bits of the bloom filter to test for the given entry.

Generated from protobuf message google.firestore.v1.BloomFilter

Namespace

Google \ Cloud \ Firestore \ V1

Methods

__construct

Constructor.

Parameters
Name Description
data array

Optional. Data for populating the Message object.

↳ bits Google\Cloud\Firestore\V1\BitSequence

The bloom filter data.

↳ hash_count int

The number of hashes used by the algorithm.

getBits

The bloom filter data.

Returns
Type Description
Google\Cloud\Firestore\V1\BitSequence|null

hasBits

clearBits

setBits

The bloom filter data.

Parameter
Name Description
var Google\Cloud\Firestore\V1\BitSequence
Returns
Type Description
$this

getHashCount

The number of hashes used by the algorithm.

Returns
Type Description
int

setHashCount

The number of hashes used by the algorithm.

Parameter
Name Description
var int
Returns
Type Description
$this