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2026-06-24 13:47:14 +02:00
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+## Summary
+<!--Explain briefly what goes wrong and explain why you believe this is a bug and not the intended behavior of SQLite (if it is not a crash).-->**No review yet**
+
+## Minimized query
+
+```sql
+ATTACH DATABASE ':memory:' AS aux92;
+PRAGMA read_uncommitted;
+PRAGMA empty_result_callbacks = NO;
+PRAGMA vdbe_listing = FALSE;
+.timer on
+CREATE TABLE q(s string, id string, constraint pk_q primary key(id));
+BEGIN;
+INSERT INTO q(s,id) VALUES('hello','id.1');
+INSERT INTO q(s,id) VALUES('goodbye','id.2');
+INSERT INTO q(s,id) VALUES('again','id.3');
+END;
+SELECT * FROM q;
+DELETE FROM q WHERE rowid > 1;
+
+SELECT LEAD(id, 0, 'default') OVER (ORDER BY id RANGE BETWEEN 1 PRECEDING AND 1 FOLLOWING) FROM q;
+DETACH DATABASE aux92;
+INSERT OR FAIL INTO q VALUES (NULL, NULL);
+```
+
+## Actual output
+
+```sql
+0
+Run Time: real 0.000 user 0.000126 sys 0.000000
+Run Time: real 0.000 user 0.000003 sys 0.000000
+Run Time: real 0.000 user 0.000019 sys 0.000000
+Run Time: real 0.000 user 0.000006 sys 0.000000
+Run Time: real 0.000 user 0.000005 sys 0.000000
+Run Time: real 0.000 user 0.000003 sys 0.000000
+hello|id.1
+goodbye|id.2
+again|id.3
+Run Time: real 0.000 user 0.000012 sys 0.000000
+Run Time: real 0.000 user 0.000020 sys 0.000000
+id.1
+Run Time: real 0.001 user 0.000089 sys 0.000000
+Run Time: real 0.000 user 0.000006 sys 0.000000
+Run Time: real 0.000 user 0.000013 sys 0.000000
+```
+
+## Expectation
+
+```sql
+0
+Run Time: real 0.000072 user 0.000085 sys 0.000000
+Run Time: real 0.000002 user 0.000002 sys 0.000000
+Run Time: real 0.000015 user 0.000015 sys 0.000000
+Run Time: real 0.000004 user 0.000004 sys 0.000000
+Run Time: real 0.000003 user 0.000002 sys 0.000000
+Run Time: real 0.000002 user 0.000002 sys 0.000000
+hello|id.1
+goodbye|id.2
+again|id.3
+Run Time: real 0.000006 user 0.000006 sys 0.000000
+Run Time: real 0.000015 user 0.000014 sys 0.000000
+id.1
+Run Time: real 0.000080 user 0.000081 sys 0.000000
+Run Time: real 0.000004 user 0.000003 sys 0.000000
+Run Time: real 0.000061 user 0.000062 sys 0.000000
+```
+
+## Flag
+
+```
+
+```
+