{"id":"broadcast-hash-join-requires-small-side-in-memory","text":"`BroadcastHashJoin` loads the entire small dataset into a hash table at construction time via `_build_hash_table`, so the small side must fit in a single mapper's memory","truth_value":"IN","source":"entries/2026/05/29/topic-ddia-ch10-reduce-side-joins.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"broadcast-hash-join-requires-small-side-in-memory","truth_value":"IN","reason":"premise"}]}}