Module key_existence 

Key existence tracking for merge insert conflict detection.

A merge insert records the join keys it inserted into a bloom filter, which is carried in the transaction so a concurrent commit can detect whether it inserted any of the same keys. The filter is serialized into the transaction protobuf, so it lives at the table layer next to crate::format::pb.

Structs

KeyExistenceFilter

Tracks keys of inserted rows for conflict detection. Only created when ON columns match the schema’s unenforced primary key.

KeyExistenceFilterBuilder

Builder for KeyExistenceFilter using Split Block Bloom Filter.

Enums

FilterType

Filter type for key existence data.

KeyValue

Key value for conflict detection.

Constants

BLOOM_FILTER_DEFAULT_NUMBER_OF_ITEMS

BLOOM_FILTER_DEFAULT_PROBABILITY

Functions

extract_key_value_from_batch

Extract key value from a batch row. Returns None if null or unsupported type.