Read PostgreSQL mapping rows by position during joint preflight

paper_atlas/ingestion/joint_editions.py

@@ -62,7 +62,7 @@ def inspect(c):
             WHERE v.acronym IN ('IJCAI','ECAI+IJCAI') AND e.year=? AND e.track='main' ''', (year,)).fetchall()
         if len(rows) != 1:
             raise ValueError('Expected one existing edition per year; missing or colliding editions require separate review')
-        edition, venue, acronym = rows[0]
+        edition, venue, acronym = (rows[0][i] for i in range(3))
         count = c.execute('SELECT count(*) FROM submissions WHERE edition_id=?', (edition,)).fetchone()[0]
         if not 0 < count <= 5000:
             raise ValueError('Existing edition must have a nonempty bounded submission scope')
@@ -73,7 +73,8 @@ def inspect(c):
             JOIN source_records r ON r.id=ss.source_record_id JOIN sources src ON src.id=r.source_id
             WHERE s.edition_id=? AND src.name='dblp' ORDER BY s.id,r.id''', (edition,)).fetchall()
         seen = set()
-        for sid, external, metadata in evidence:
+        for row in evidence:
+            sid, external, metadata = (row[i] for i in range(3))
             meta = json.loads(metadata)
             bibliography = meta.get('bibliography') or {}
             if (meta.get('snapshot_sha256') != XML_SHA