{"id":"map-side-join-cartesian-on-duplicates","text":"When multiple records share the same join key value, all three strategies produce the cartesian product of the matching left and right groups","truth_value":"IN","source":"entries/2026/05/29/map-side-join-map_side_joins.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"map-side-join-cartesian-on-duplicates","truth_value":"IN","reason":"premise"}]}}