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[Quy Anh] «Elliot» Nguyen
2026-06-24 13:47:14 +02:00
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part1/results/3/bug_10755d38-396f-4729-a18f-88e8859d82a0_logic.md
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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
PRAGMA wal_checkpoint('RESTART');
.progress
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
((ATTACH)) DATABASE ':memory:' AS aux0;
CREATE TABLE t1(a int);
ALTER TABLE t1 ADD COLUMN b INTEGER DEFAULT NULL;
ALTER TABLE t1 ADD COLUMN c TEXT DEFAULT 'default-text';
ALTER TABLE t1 RENAME TO t2;
ALTER TABLE t2 ADD COLUMN d BLOB DEFAULT X'ABCD';
DETACH DATABASE aux0;
SELECT STRING_AGG(a, '|') FROM t1;
INSERT INTO t1 VALUES (NULL);
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
DROP TRIGGER IF EXISTS t1;
CREATE INDEX IF NOT EXISTS idx_t1_3560 ON t1((c + 1)) WHERE c IS NOT NULL;
SELECT * FROM (SELECT * FROM t1) AS sub;
SELECT * FROM t1;
ALTER TABLE t1 ADD COLUMN extra_4679 SMALLINT DEFAULT (random());
INSERT INTO t1 DEFAULT VALUES;
SELECT GROUP_CONCAT(c, '|') FROM t1;
PRAGMA wal_checkpoint('RESTART');
.progress
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
((ATTACH)) DATABASE ':memory:' AS aux0;
CREATE TABLE t1(a int);
ALTER TABLE t1 ADD COLUMN b INTEGER DEFAULT NULL;
ALTER TABLE t1 ADD COLUMN c TEXT DEFAULT 'default-text';
ALTER TABLE t1 RENAME TO t2;
ALTER TABLE t2 ADD COLUMN d BLOB DEFAULT X'ABCD';
DETACH DATABASE aux0;
SELECT STRING_AGG(a, '|') FROM t1;
INSERT INTO t1 VALUES (NULL);
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
DROP TRIGGER IF EXISTS t1;
CREATE INDEX IF NOT EXISTS idx_t1_3560 ON t1((c + 1)) WHERE c IS NOT NULL;
SELECT * FROM (SELECT * FROM t1) AS sub;
SELECT * FROM t1;
ALTER TABLE t1 ADD COLUMN extra_4679 SMALLINT DEFAULT (random());
INSERT INTO t1 DEFAULT VALUES;
SELECT GROUP_CONCAT(c, '|') FROM t1;
PRAGMA wal_checkpoint('RESTART');
.progress
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
((ATTACH)) DATABASE ':memory:' AS aux0;
CREATE TABLE t1(a int);
ALTER TABLE t1 ADD COLUMN b INTEGER DEFAULT NULL;
ALTER TABLE t1 ADD COLUMN c TEXT DEFAULT 'default-text';
ALTER TABLE t1 RENAME TO t2;
ALTER TABLE t2 ADD COLUMN d BLOB DEFAULT X'ABCD';
DETACH DATABASE aux0;
SELECT STRING_AGG(a, '|') FROM t1;
INSERT INTO t1 VALUES (NULL);
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
DROP TRIGGER IF EXISTS t1;
CREATE INDEX IF NOT EXISTS idx_t1_3560 ON t1((c + 1)) WHERE c IS NOT NULL;
SELECT * FROM (SELECT * FROM t1) AS sub;
SELECT * FROM t1;
ALTER TABLE t1 ADD COLUMN extra_4679 SMALLINT DEFAULT (random());
INSERT INTO t1 DEFAULT VALUES;
SELECT GROUP_CONCAT(c, '|') FROM t1;
PRAGMA wal_checkpoint('RESTART');
.progress
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
((ATTACH)) DATABASE ':memory:' AS aux0;
CREATE TABLE t1(a int);
ALTER TABLE t1 ADD COLUMN b INTEGER DEFAULT NULL;
ALTER TABLE t1 ADD COLUMN c TEXT DEFAULT 'default-text';
ALTER TABLE t1 RENAME TO t2;
ALTER TABLE t2 ADD COLUMN d BLOB DEFAULT X'ABCD';
DETACH DATABASE aux0;
SELECT STRING_AGG(a, '|') FROM t1;
INSERT INTO t1 VALUES (NULL);
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
DROP TRIGGER IF EXISTS t1;
CREATE INDEX IF NOT EXISTS idx_t1_3560 ON t1((c + 1)) WHERE c IS NOT NULL;
SELECT * FROM (SELECT * FROM t1) AS sub;
SELECT * FROM t1;
ALTER TABLE t1 ADD COLUMN extra_4679 SMALLINT DEFAULT (random());
INSERT INTO t1 DEFAULT VALUES;
SELECT GROUP_CONCAT(c, '|') FROM t1;
```
## Actual output
```sql
0,-1,-1
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
0,-1,-1
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
```
-quote
```