Module predicate 

Scan predicates for block-level predicate pushdown.

A ScanPredicate describes a filter on a single column that can be evaluated against BlockStats to skip entire blocks without decompressing.

Predicates work for both numeric columns (comparing against BlockStats.min / BlockStats.max) and string columns (comparing against BlockStats.str_min / BlockStats.str_max). For string Eq predicates the optional bloom filter provides an additional fast-reject path.

Structs

ScanPredicate

A predicate on a single column for block-level pushdown.

Enums

PredicateOp

Comparison operator for scan predicates.

PredicateValue

The value side of a scan predicate.

Constants

BLOOM_BITS_DEFAULT

Default bloom filter size in bits (2048 bits = 256 bytes).

BLOOM_BYTES

Convenience byte count for the default bit array size.

BLOOM_K_DEFAULT

Default number of independent hash functions.

Functions

bloom_insert

Insert a string value into a BloomFilter.

bloom_may_contain

Test whether a string value may be present in a BloomFilter.

build_bloom

Build a new BloomFilter with the default parameters (k=3, m=2048) and insert all provided string values.

build_bloom_with_params

Build a BloomFilter with explicit k (hash function count) and m (bit-array size). m must be a power of two and at least 8.

f64_to_exact_i64

Convert an f64 to i64 only if the conversion is exact.