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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 aux44;
+PRAGMA ignore_check_constraints = ON;
+SAVEPOINT sp2435;
+SAVEPOINT sp2550;
+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
+CREATE TABLE main.T (
+  a INTEGER,
+  b TEXT,
+  c INTEGER
+);
+INSERT INTO T VALUES (-(-(ifnull(x'0a61e433b2ab715e25765c', 2))),'a',NULL), (2,'b',1), (3,'c',2);
+WITH RECURSIVE d(a,b,c,e) AS (
+  SELECT *,1 FROM T WHERE c IS NULL
+  UNION ALL
+  SELECT T.a,T.b,T.c,d.e+1
+  FROM T JOIN d ON T.c=d.a
+)
+SELECT * FROM d;
+DELETE FROM T WHERE b IS NULL RETURNING *;
+SELECT * FROM T;
+DROP TABLE IF EXISTS T;
+ROLLBACK TRANSACTION TO SAVEPOINT sp2550;
+RELEASE SAVEPOINT sp2550;
+RELEASE sp2435;
+WITH cte AS (SELECT NULL AS x, NULL AS y) SELECT x, y, x IS NULL FROM cte;
+CREATE TABLE T (
+  a INTEGER,
+  b TEXT,
+  c INTEGER
+);
+INSERT INTO T VALUES (1,'a',NULL), (2,'b',1), (3,'c',2);
+WITH RECURSIVE d(a,b,c,e) AS (
+  SELECT *,1 FROM T WHERE c IS NULL
+  UNION ALL
+  SELECT T.a,T.b,T.c,d.e+1
+  FROM T JOIN d ON T.c=d.a
+)
+SELECT * FROM d;
+SELECT COUNT(*) FILTER (WHERE a IS NOT NULL), SUM(rowid) FILTER (WHERE a > 0), COUNT(*) FILTER (WHERE 1=0), COUNT(*) FILTER (WHERE 1=1), COUNT(*) FILTER (WHERE NULL), AVG(a) FILTER (WHERE a > 0 OR a < 100), COUNT(*) FILTER (WHERE typeof(a) = "text") FROM T;
+ANALYZE T;
+INSERT INTO T VALUES (NULL, 1, 'x') ON CONFLICT(a) DO UPDATE SET a = excluded.a, b = excluded.b, c = excluded.c;
+CREATE  INDEX IF NOT EXISTS idx_T_9641 ON T(a) WHERE a > 0;
+SELECT * FROM T AS a RIGHT JOIN T AS b ON a.rowid = b.rowid;
+REINDEX T;
+ALTER TABLE T DROP COLUMN b;
+VACUUM main;
+SELECT AVG(a) FROM T;
+DETACH DATABASE aux44;
+PRAGMA ignore_check_constraints = ON;
+ALTER TABLE T DROP COLUMN b;
+INSERT INTO T DEFAULT VALUES;
+SELECT * FROM T WHERE EXISTS (SELECT 1 FROM T WHERE EXISTS (SELECT 1 FROM T));
+ANALYZE T;
+ALTER TABLE T RENAME COLUMN a TO a_r5439;
+ALTER TABLE T DROP COLUMN a;
+```
+
+## 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
+
+```
+
+```
+