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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
+CREATE TABLE t1(a INTEGER PRIMARY KEY, b TEXT, c INT, d INT);
+INSERT INTO t1 VALUES (1, 'Wernher', 10, 100);
+INSERT INTO t1 VALUES (2, 'von', 20, 200);
+INSERT INTO t1 VALUES (3, 'Braun', 30, 300);
+
+CREATE INDEX t1bc ON t1(b, c);
+
+PRAGMA writable_schema = ON;
+
+.imposter t1bc t2
+
+SELECT * FROM t2;
+
+SELECT b, c FROM t1 ORDER BY b, c;
+
+.quit
+PRAGMA pragma_list;
+CREATE TABLE T1 (
+  A VARCHAR(-(-(hex(2790980413263895699)))),
+  X VARCHAR(10),
+  PRIMARY KEY (A, X),
+  UNIQUE (X)
+);
+CREATE TABLE T2 (
+  A VARCHAR(20),
+  Y VARCHAR(10) UNIQUE,
+  PRIMARY KEY (A, Y)
+);
+INSErT INTO T1 VALUES ('a', 'm');
+INSERT INTO T1 VALUES ('b', 'n');
+INSERT INTO T2 VALUES ('b', 'k');
+WITH _m AS MATERIALIZED (SELECT * FROM T1) SELECT A FROM _m UNION ALL SELECT A FROM T2 ORDER BY A;
+SELECT * FROM T1 NATURAL JOIN T1;
+ALTER TABLE T1 ADD COLUMN extra_1763 NCHAR(55);
+ALTER TABLE T2 RENAME TO T2_r7203;
+ALTER TABLE T2 DROP COLUMN Y;
+CREATE UNIQUE  INDEX IF NOT EXISTS idx_T1_4762 ON T1((A + 1)) WHERE A IS NOT NULL;
+ANALYZE T2;
+REINDEX T2;
+INSERT INTO T2 VALUES ('x', 1) ON CONFLICT(A) DO UPDATE SET A = excluded.A, Y = excluded.Y;
+INSERT OR FAIL INTO T2 VALUES (1, 'x');
+SELECT LAST_VALUE(A) OVER (ORDER BY A ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING EXCLUDE GROUP) FROM T2;
+INSERT INTO T2 VALUES (NULL, NULL);
+```
+
+## Actual output
+
+```sql
+CREATE TABLE "t2"("b","c","_ROWID_",PRIMARY KEY("b","c","_ROWID_"))WITHOUT ROWID;
+WARNING: writing to an imposter table will corrupt the "t1bc" index!
+Braun|30|3
+Wernher|10|1
+von|20|2
+Braun|30
+Wernher|10
+von|20
+```
+
+## Expectation
+
+```sql
+CREATE TABLE "t2"("b","c","_ROWID_",PRIMARY KEY("b","c","_ROWID_"))WITHOUT ROWID;
+Braun|30|3
+Wernher|10|1
+von|20|2
+Braun|30
+Wernher|10
+von|20
+```
+
+## Flag
+
+```
+
+```
+